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From: Kalin K. <me....@gm...> - 2017-05-19 09:14:06
|
Hello, On Thu, May 18, 2017 at 4:05 AM, Wah Jong <wa...@gm...> wrote: > I have been trying regular expression in Scalpel version 2.1, no luch with > carriage return \r inside character class bracket, e.g. [\r\n] > > /[\r\n]+/ > I don't know what exactly are you trying to do, please post more info/test case (e.g. a simple configuration file you try to use)? > Any one has hints? > May be instead of "\n" try "\0x0A", etc. Kalin. |
From: Freeman Ng <fr...@is...> - 2017-05-18 11:07:22
|
Hi, I have happily downloaded Autopsy v4.3.0 64-bit for Windows (currently on Windows 7 Pro), but have done a couple of test runs. Two out of two tries I found Autopsy hanging without response in the middle of ingesting files. Do I miss anything here? -- Best regards, Freeman |
From: Wah J. <wa...@gm...> - 2017-05-18 02:06:03
|
Dear all, I have been trying regular expression in Scalpel version 2.1, no luch with carriage return \r inside character class bracket, e.g. [\r\n] /[\r\n]+/ Any one has hints? Best wishes Wah Jong |
From: Brian C. <ca...@sl...> - 2017-05-05 14:09:30
|
*Autopsy training is 1-month away (June 13) in Herndon, VA. We'll also be doing a 2-day event after OSDFCon (Oct 18-19). Registration links are available at: http://www.autopsy.com/training/ <http://www.autopsy.com/training/>The 1-day Autopsy course is $499 and provides an overview of using and configuring Autopsy. It combines lecture sessions with hands on exercises. All sessions are worth 6 CPE credits and students receive certificates of completion for attendance. At the end of the class, you’ll know about how all of the modules work and how to efficiently use the tool.More details can be found here: http://www.autopsy.com/training/ <http://www.autopsy.com/training/>We’re looking to add more events to the schedule. If you’d like training closer to you, then let us know where. * |
From: Brian C. <ca...@sl...> - 2017-05-05 13:59:12
|
If you didn't see it, Autopsy was nominated for the Forensic 4Cast awards in the open source category. You can vote for it here. https://forensic4cast.com/forensic-4cast-awards/ Votes are due May 31. thanks, brian |
From: Luís F. N. <lfc...@gm...> - 2017-04-28 20:03:08
|
Opened https://github.com/sleuthkit/sleuthkit/issues/821 I will provide any other info needed to help fix the issue, now that I have at hand an image to reproduce the problem. Thanks, Luis 2017-04-28 16:46 GMT-03:00 Luís Filipe Nassif <lfc...@gm...>: > Hi folks, > > We are still having this issue with tsk-4.4. I have received one report > yesterday and one today about the processing hanging with thousands of > orphan files with ~4GB of size, which together result in 140TB of data in > one image! > > Fortunately I have access to the image of the other report. Looking at it, > the orphans together resulted in ~500GB of data, they were recovered from a > FAT32 file system of only ~32GB of size! That 32GB FAT32 FS was recovered > from a 92,5 KB volume/partition! This 92,5KB partition recognized by > TSK-4.4 is shown by FTKImager as an unpartitioned space, but I think this > is another issue. > > I have trimmed the image down from the original 320GB to 10GB (5GB in ewf > format) without the user data. Because of that, the orphan files together > now result in ~45GB (not the original 500GB). I will open a ticket at > github and post the link to the trimmed image there for reproducing the > problem. > > PS: In the past I have received similar reports with thumbdrives. So looks > like the issue is with FAT and not with NTFS like I originally reported > below. Probably those ntfs images had fat32 partitions side by side. This > explains the upper limit of 4GB of size of those orphans. > > Regards, > Luis Nassif > > > 2015-09-07 12:12 GMT-03:00 Luís Filipe Nassif <lfc...@gm...>: > >> Sorry for the long delay. I do not have the image with me, I will ask my >> colleague if trimming the image is possible... We worked around the problem >> by filtering out orphans with logical size greater than 10 MB before >> sending them to the processing engine. >> >> Thank you, >> Luis >> >> 2015-08-13 14:13 GMT-03:00 Stefan Petrea <ste...@gm...>: >> >>> Hi Luis, >>> >>> Could the NTFS image you're looking at be trimmed down and provided as >>> sample input to reproduce the problem ? >>> >>> Best Regards, >>> Stefan >>> >>> On Thu, Aug 13, 2015 at 8:05 PM, Luís Filipe Nassif <lfc...@gm... >>> > wrote: >>> >>>> This error have happened again with a colleague's NTFS image, using the >>>> develop branch compiled about 1 month ago. Thousands of huge corrupted >>>> orphans were added by loaddb, which caused our processing application (and >>>> probably Autopsy too) to process indefinitely the evidence. >>>> >>>> Any help will be appreciated. >>>> >>>> Regards, >>>> Luis Nassif >>>> >>>> >>>> 2014-09-30 21:00 GMT-03:00 Luís Filipe Nassif <lfc...@gm...>: >>>> >>>>> This problem still happens with 4.2.0 branch. If I can help with some >>>>> more information, please let me know. >>>>> >>>>> Thanks >>>>> Luis >>>>> >>>>> 2014-07-24 9:21 GMT-03:00 Luís Filipe Nassif <lfc...@gm...>: >>>>> >>>>>> Another information: the sum of the millions of file sizes resulted >>>>>> in 1,1 petabyte, while the image has only 250 GB. >>>>>> >>>>>> >>>>>> 2014-07-23 22:21 GMT-03:00 Luís Filipe Nassif <lfc...@gm...>: >>>>>> >>>>>>> We tested loaddb of both the released 4.1.3 version and the develop >>>>>>> branch of sleuthkit on a NTFS image of a hard disk with a lot of bad >>>>>>> blocks, many of them at the beginning of the disk. >>>>>>> >>>>>>> The 4.1.3 version found ~400.000 allocated files more ~100.000 >>>>>>> orphan files, about the same found by other forensic tools. The develop >>>>>>> branch found the same ~400.000 allocated files more ~2.500.000 orphan >>>>>>> files! Most of these millions of orphans have corrupted names or the name >>>>>>> OrphanFile-xxxxxxx and have lengths ranging from 0 to 4.294.967.296 bytes. >>>>>>> We think the recent changes to NTFS code are causing this large number of >>>>>>> corrupted orphans to be added to the case. Maybe it should be investigated >>>>>>> before the final 4.2 release. >>>>>>> >>>>>>> Luis >>>>>>> >>>>>> >>>>>> >>>>> >>>> >>>> ------------------------------------------------------------ >>>> ------------------ >>>> >>>> _______________________________________________ >>>> sleuthkit-developers mailing list >>>> sle...@li... >>>> https://lists.sourceforge.net/lists/listinfo/sleuthkit-developers >>>> >>>> >>> >> > |
From: Luís F. N. <lfc...@gm...> - 2017-04-28 19:47:07
|
Hi folks, We are still having this issue with tsk-4.4. I have received one report yesterday and one today about the processing hanging with thousands of orphan files with ~4GB of size, which together result in 140TB of data in one image! Fortunately I have access to the image of the other report. Looking at it, the orphans together resulted in ~500GB of data, they were recovered from a FAT32 file system of only ~32GB of size! That 32GB FAT32 FS was recovered from a 92,5 KB volume/partition! This 92,5KB partition recognized by TSK-4.4 is shown by FTKImager as an unpartitioned space, but I think this is another issue. I have trimmed the image down from the original 320GB to 10GB (5GB in ewf format) without the user data. Because of that, the orphan files together now result in ~45GB (not the original 500GB). I will open a ticket at github and post the link to the trimmed image there for reproducing the problem. PS: In the past I have received similar reports with thumbdrives. So looks like the issue is with FAT and not with NTFS like I originally reported below. Probably those ntfs images had fat32 partitions side by side. This explains the upper limit of 4GB of size of those orphans. Regards, Luis Nassif 2015-09-07 12:12 GMT-03:00 Luís Filipe Nassif <lfc...@gm...>: > Sorry for the long delay. I do not have the image with me, I will ask my > colleague if trimming the image is possible... We worked around the problem > by filtering out orphans with logical size greater than 10 MB before > sending them to the processing engine. > > Thank you, > Luis > > 2015-08-13 14:13 GMT-03:00 Stefan Petrea <ste...@gm...>: > >> Hi Luis, >> >> Could the NTFS image you're looking at be trimmed down and provided as >> sample input to reproduce the problem ? >> >> Best Regards, >> Stefan >> >> On Thu, Aug 13, 2015 at 8:05 PM, Luís Filipe Nassif <lfc...@gm...> >> wrote: >> >>> This error have happened again with a colleague's NTFS image, using the >>> develop branch compiled about 1 month ago. Thousands of huge corrupted >>> orphans were added by loaddb, which caused our processing application (and >>> probably Autopsy too) to process indefinitely the evidence. >>> >>> Any help will be appreciated. >>> >>> Regards, >>> Luis Nassif >>> >>> >>> 2014-09-30 21:00 GMT-03:00 Luís Filipe Nassif <lfc...@gm...>: >>> >>>> This problem still happens with 4.2.0 branch. If I can help with some >>>> more information, please let me know. >>>> >>>> Thanks >>>> Luis >>>> >>>> 2014-07-24 9:21 GMT-03:00 Luís Filipe Nassif <lfc...@gm...>: >>>> >>>>> Another information: the sum of the millions of file sizes resulted in >>>>> 1,1 petabyte, while the image has only 250 GB. >>>>> >>>>> >>>>> 2014-07-23 22:21 GMT-03:00 Luís Filipe Nassif <lfc...@gm...>: >>>>> >>>>>> We tested loaddb of both the released 4.1.3 version and the develop >>>>>> branch of sleuthkit on a NTFS image of a hard disk with a lot of bad >>>>>> blocks, many of them at the beginning of the disk. >>>>>> >>>>>> The 4.1.3 version found ~400.000 allocated files more ~100.000 orphan >>>>>> files, about the same found by other forensic tools. The develop branch >>>>>> found the same ~400.000 allocated files more ~2.500.000 orphan files! Most >>>>>> of these millions of orphans have corrupted names or the name >>>>>> OrphanFile-xxxxxxx and have lengths ranging from 0 to 4.294.967.296 bytes. >>>>>> We think the recent changes to NTFS code are causing this large number of >>>>>> corrupted orphans to be added to the case. Maybe it should be investigated >>>>>> before the final 4.2 release. >>>>>> >>>>>> Luis >>>>>> >>>>> >>>>> >>>> >>> >>> ------------------------------------------------------------ >>> ------------------ >>> >>> _______________________________________________ >>> sleuthkit-developers mailing list >>> sle...@li... >>> https://lists.sourceforge.net/lists/listinfo/sleuthkit-developers >>> >>> >> > |
From: Brian C. <ca...@sl...> - 2017-04-19 16:28:01
|
There a new pre-indexed NSRL on the sourceforge site. It is smaller than in the past because NIST now groups them differently. The "Modern" distribution is up there. https://sourceforge.net/projects/autopsy/files/NSRL/NSRL-255m-autopsy.zip/download You will notice that we are already a version behind, but we are trying to figure out what to do with the latest, since there no longer seems to a minimal version and it is in ISO form. So, we need to update our procedures, but I didn't want to delay in at least getting 255 out there. brian |
From: Stefan K. <sle...@df...> - 2017-04-18 08:46:45
|
Brian, > Known examples already include: > - email > - phone > - credit card / bank > - chat app (WhatsApp, Twitter, Hangouts, etc.) > - website login (Facebook, forums, etc.) > - computer login account (Windows account, etc.) > > Anything else you want us to make sure we support? what about database credentials? Cheers, Stefan. -- Stefan Kelm Mail: ke...@df... Phone: +49 40 808077-686 DFN-CERT Services GmbH, https://www.dfn-cert.de, Fax: +49 40 808077-556 Sitz / Register: Hamburg, AG Hamburg, HRB 88805, Ust-IdNr.: DE232129737 Sachsenstraße 5, 20097 Hamburg/Germany. CEO: Dr. Klaus-Peter Kossakowski |
From: Brian C. <ca...@sl...> - 2017-04-17 20:50:57
|
We are in the process of designing a new infrastructure to Autopsy to store "account" information and messages between the accounts. This will allow Autopsy to better store and display emails, text messages, chat logs, etc. Essentially, accounts and messages will become more first-class citizens than they are now. Can you help us out by sending me (off list if you want), what types of accounts you most often deal with so that we can make sure that we have a way of storing all of the relevant data. Known examples already include: - email - phone - credit card / bank - chat app (WhatsApp, Twitter, Hangouts, etc.) - website login (Facebook, forums, etc.) - computer login account (Windows account, etc.) Anything else you want us to make sure we support? |
From: Brian C. <ca...@sl...> - 2017-04-17 18:19:05
|
We’re a bit late this year, but it’s time to start getting ready for the 8th Annual Open Source Digital Forensics Conference (OSDFCon). * Conference Date: October 17, 2017 * Location: Herndon, VA We want you to start submitting your talk ideas, writing Autopsy modules, and saving the date on your calendar. OSDFCon is the 1-day event to attend each year to learn about the latest open source digital forensics and incident response tools with over 400 of your colleagues. If you want to get direct updates as the event gets closer, sign up at http://www.osdfcon.org/get-updates/. CALL FOR PRESENTATIONS AND WORKSHOPS Each year, OSDFCon gives developers and users a platform to talk about the open source software they love and give hands-on workshops. We want to hear your presentation and workshop ideas. Submissions are due by June 1. Past presentations have covered new software, new features in mature software, modules for plug-in frameworks, and use cases that integrate several pieces of software. A detailed list of topics and submission details can be found here: http://www.osdfcon.org/osdfcon-2017/2017-call-for-presentations/ AUTOPSY MODULE COMPETITION Basis Technology is again organizing an Autopsy module writing competition. The modules can be written in Python or Java and we have tutorials to help you get started. Learning to write Autopsy modules will make you more efficient because Autopsy takes care of providing access to files, user interface, and reporting. All you have to do is focus on some cool analytics. Attendees of OSDFCon vote to help pick the winner and the top three will get cash prizes. If we get 12 or more submissions, Basis Technology will double the prize amounts. Submissions are due by October 2 (5+ months away!). Links to tutorials and submission details can be found here: http://www.osdfcon.org/osdfcon-2017/2017-module-development-contest/ SPONSORSHIP We have a few sponsorship opportunities available if you would like to help support the open source community and get exposure to the audience by having a table at the event. http://www.osdfcon.org/sponsorship-opportunities/ ABOUT OSDFCON OSDFCon is the premier event focused exclusively on open source digital forensics tools, OSDFCon offers short talks over the course of a single day. These talks are packed with information and present a unique opportunity to learn about new (often free) tools and provide feedback directly to developers. Basis Technology is the organizing sponsor of the event and it is free for government employees to attend. |
From: Luís F. N. <lfc...@gm...> - 2017-03-30 20:42:11
|
Hi, Did someone with ISO9660 knowledge have take a look at https://github.com/sleuthkit/sleuthkit/issues/393 ? I think it is a critical issue and currently TSK could miss a whole directory structure without any warning. Thanks, Luis |
From: Nanni B. <dig...@gm...> - 2017-03-06 18:54:12
|
Hi David, are you using NBTempoW 2.0? I guess yes...so, it's strange, because I and other people have tried on E01 and DD (raw) images and it works fine. Did you select a date range? Or did you use no parameters? Let me know :-) BTW you can try using tsk_gettimes.exe disk.E01 | mactime exe -d 0000-00-00 > timeline.csv you can find them in \bin directory, so you can check using only TSK tools without my GUI and let me know if it works. Thank you 2017-03-06 19:43 GMT+01:00 David Nides <dav...@gm...>: > just for kicks i tried running it quickly on a few images (e01) to see > what the output looks like and it produced empty excels each time. > > On Fri, Mar 3, 2017 at 4:28 AM, Nanni Bassetti <dig...@gm...> wrote: > >> Thanks to Derrick Karpo for warning of a problem in the file selection, I >> changed the system and now there is NBTempoW V. 2.0 ;-) >> >> 2017-03-02 22:04 GMT+01:00 Nanni Bassetti <dig...@gm...>: >> >>> NBTempoW is a forensic tool for making timelines from block devices >>> image files (raw, ewf,etc.). It uses TSK (The Sleuthkit) and it has been >>> developed with Lazarus V. 1.6.2 ( Delphi compatible cross-platform IDE for >>> Rapid Application Development). It runs only in Windows. If the device >>> image file is splitted, you can select just the first chunk. >>> https://github.com/nannib/NBTEMPOW >>> >>> Enjoy it! ;-) >>> >>> Dott. Nanni Bassetti >>> www.nannibassetti.com >>> >> >> >> >> -- >> Dott. Nanni Bassetti >> http://www.nannibassetti.com >> CAINE project manager - http://www.caine-live.net >> >> ------------------------------------------------------------ >> ------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >> _______________________________________________ >> sleuthkit-users mailing list >> https://lists.sourceforge.net/lists/listinfo/sleuthkit-users >> http://www.sleuthkit.org >> >> > -- Dott. Nanni Bassetti http://www.nannibassetti.com CAINE project manager - http://www.caine-live.net |
From: David N. <dav...@gm...> - 2017-03-06 18:43:34
|
just for kicks i tried running it quickly on a few images (e01) to see what the output looks like and it produced empty excels each time. On Fri, Mar 3, 2017 at 4:28 AM, Nanni Bassetti <dig...@gm...> wrote: > Thanks to Derrick Karpo for warning of a problem in the file selection, I > changed the system and now there is NBTempoW V. 2.0 ;-) > > 2017-03-02 22:04 GMT+01:00 Nanni Bassetti <dig...@gm...>: > >> NBTempoW is a forensic tool for making timelines from block devices image >> files (raw, ewf,etc.). It uses TSK (The Sleuthkit) and it has been >> developed with Lazarus V. 1.6.2 ( Delphi compatible cross-platform IDE for >> Rapid Application Development). It runs only in Windows. If the device >> image file is splitted, you can select just the first chunk. >> https://github.com/nannib/NBTEMPOW >> >> Enjoy it! ;-) >> >> Dott. Nanni Bassetti >> www.nannibassetti.com >> > > > > -- > Dott. Nanni Bassetti > http://www.nannibassetti.com > CAINE project manager - http://www.caine-live.net > > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > sleuthkit-users mailing list > https://lists.sourceforge.net/lists/listinfo/sleuthkit-users > http://www.sleuthkit.org > > |
From: Nanni B. <dig...@gm...> - 2017-03-03 10:29:04
|
Thanks to Derrick Karpo for warning of a problem in the file selection, I changed the system and now there is NBTempoW V. 2.0 ;-) 2017-03-02 22:04 GMT+01:00 Nanni Bassetti <dig...@gm...>: > NBTempoW is a forensic tool for making timelines from block devices image > files (raw, ewf,etc.). It uses TSK (The Sleuthkit) and it has been > developed with Lazarus V. 1.6.2 ( Delphi compatible cross-platform IDE for > Rapid Application Development). It runs only in Windows. If the device > image file is splitted, you can select just the first chunk. > https://github.com/nannib/NBTEMPOW > > Enjoy it! ;-) > > Dott. Nanni Bassetti > www.nannibassetti.com > -- Dott. Nanni Bassetti http://www.nannibassetti.com CAINE project manager - http://www.caine-live.net |
From: Nanni B. <dig...@gm...> - 2017-03-02 21:04:16
|
NBTempoW is a forensic tool for making timelines from block devices image files (raw, ewf,etc.). It uses TSK (The Sleuthkit) and it has been developed with Lazarus V. 1.6.2 ( Delphi compatible cross-platform IDE for Rapid Application Development). It runs only in Windows. If the device image file is splitted, you can select just the first chunk. https://github.com/nannib/NBTEMPOW Enjoy it! ;-) Dott. Nanni Bassetti www.nannibassetti.com |
From: Lloyd <llo...@gm...> - 2017-02-24 06:08:28
|
Hi, In ntfs.c file there is a function named "ntfs_open". In that, a memory is allocated with "tsk_fs_malloc" , line no. 4829 if ((ntfs = (NTFS_INFO *) tsk_fs_malloc(sizeof(*ntfs))) == NULL) But it is freed at the end using "free" (5131) instead of "tsk_fs_free". My VS 2015 debugger breaks here. Can anybody please verify it? Thanks, Lloyd |
From: Luís F. N. <lfc...@gm...> - 2017-02-01 17:47:16
|
I've just confirmed VSC content is now accessible through slack files with the patch! 2017-02-01 15:30 GMT-02:00 Luís Filipe Nassif <lfc...@gm...>: > Thank you, Brian, for the change! I think VSC file content will be > accessible now! > > And to clarify, I was a bit confused about the slack size of 2.026.496 > bytes, because the allocated size of the system.LOG file was not shown in > istat output. But I confirmed with another tool that the allocated size of > system.LOG is 2.027.520 bytes and with only 1024 bytes of logical size > that give us 2.026.496 bytes for the slack size. So everything was ok! > > Thanks again! > Luis > > 2017-02-01 15:06 GMT-02:00 Brian Carrier <ca...@sl...>: > >> This fix is now in the develop-4.4 branch. We'll merge it into develop >> after we do a few other minor things on this branch. >> >> >> On Wed, Feb 1, 2017 at 11:38 AM, Brian Carrier <ca...@sl...> >> wrote: >> >>> Ughh. I need to better start documenting these scenarios because I >>> always get confused by them too. >>> >>> I think you've found an issue and I created #756 ( >>> https://github.com/sleuthkit/sleuthkit/issues/756) to address this. >>> >>> The summary of your specific questions are: >>> - VSC is strange because WIndows seems to treat it differently and lies >>> about initsize. It has initsize of 0, but a file size that is equal to the >>> allocsize. >>> - In the log file case, 4096 has been initialized, but the allocated >>> size of the file is 2MB. >>> >>> >>> >>> >>> >>> >>> >>> >>> On Tue, Jan 31, 2017 at 7:26 PM, Luís Filipe Nassif <lfc...@gm... >>> > wrote: >>> >>>> Thank you, Brian, for your explanation! No problem for our application, >>>> just curious to know if it was a bug or, if not, why it is there. >>>> >>>> But, currently, no slack files are created for VSC files and other >>>> files with initsize smaller than allocated size. I thought slack is created >>>> only when allocated > logical size (based on line 1001 of db_sqlite.cpp) >>>> >>>> And is the allocated size 4096 from istat output? I do not know where >>>> the slack size of 2.026.496 bytes came from... >>>> >>>> 2017-01-31 18:05 GMT-02:00 Brian Carrier <ca...@sl...>: >>>> >>>>> Actually, making this decision could incur some significant overhead >>>>> for a step that (at least in Autopsy) we try to keep as fast as possible. >>>>> Is your application impacted by the fact that there is a large and empty >>>>> slack file or were you just curious if it was a bug? >>>>> >>>>> >>>>> >>>>> On Tue, Jan 31, 2017 at 2:54 PM, Brian Carrier <ca...@sl...> >>>>> wrote: >>>>> >>>>>> Yea, this looks like "VDL Slack". Same general idea as in Issue 466 ( >>>>>> https://github.com/sleuthkit/sleuthkit/issues/466), but in this case >>>>>> the file has 1K of initialized size. >>>>>> >>>>>> I suppose this "slack" file is a bit wasted though because no blocks >>>>>> were allocated to it. So, there will be no real content for it. >>>>>> >>>>>> I'll make an internal story to keep track of this and maybe Ann will >>>>>> be able to take a look at not making these if they are going to be all for >>>>>> address 0. >>>>>> >>>>>> >>>>>> >>>>>> On Tue, Jan 31, 2017 at 10:55 AM, Luís Filipe Nassif < >>>>>> lfc...@gm...> wrote: >>>>>> >>>>>>> Hi Brian, >>>>>>> >>>>>>> Thank you very much for your attention. The output of >>>>>>> FsContent.getMetaDataText() (equals to istat right?) is below. The >>>>>>> system.LOG-slack size is 2.026.496 bytes and system.LOG size is 1024 bytes. >>>>>>> >>>>>>> details of /img_PC-HP.dd/vol_vol2/WINDOWS >>>>>>> /system32/config/system.LOG-slack >>>>>>> >>>>>>> MFT Entry Header Values: >>>>>>> Entry: 4106 Sequence: 1 >>>>>>> $LogFile Sequence Number: 79246281526 >>>>>>> Allocated File >>>>>>> Links: 1 >>>>>>> >>>>>>> $STANDARD_INFORMATION Attribute Values: >>>>>>> Flags: Hidden, Archive >>>>>>> Owner ID: 0 >>>>>>> Security ID: 281 (S-1-5-32-544) >>>>>>> Last User Journal Update Sequence Number: 105272096 >>>>>>> Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>>>> File Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do >>>>>>> Brasil) >>>>>>> MFT Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) >>>>>>> Accessed: 2011-09-16 14:33:38.187500000 (Hora oficial do Brasil) >>>>>>> >>>>>>> $FILE_NAME Attribute Values: >>>>>>> Flags: Hidden, Archive >>>>>>> Name: system.LOG >>>>>>> Parent MFT Entry: 3982 Sequence: 2 >>>>>>> Allocated Size: 4096 Actual Size: 1024 >>>>>>> Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>>>> File Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do >>>>>>> Brasil) >>>>>>> MFT Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>>>> Accessed: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>>>> >>>>>>> $ATTRIBUTE_LIST Attribute Values: >>>>>>> Type: 16-0 MFT Entry: 4106 VCN: 0 >>>>>>> Type: 48-4 MFT Entry: 4106 VCN: 0 >>>>>>> Type: 128-0 MFT Entry: 40678 VCN: 0 >>>>>>> >>>>>>> Attributes: >>>>>>> Type: $STANDARD_INFORMATION (16-0) Name: N/A Resident size: 72 >>>>>>> Type: $ATTRIBUTE_LIST (32-5) Name: N/A Resident size: 96 >>>>>>> Type: $FILE_NAME (48-4) Name: N/A Resident size: 86 >>>>>>> Type: $DATA (128-6) Name: N/A Non-Resident size: 1024 >>>>>>> init_size: 1024 >>>>>>> 847844 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 0 >>>>>>> 0 0 0 0 0 0 0 >>>>>>> >>>>>>> 2017-01-31 12:56 GMT-02:00 Brian Carrier <ca...@sl...>: >>>>>>> >>>>>>>> Hi Luis, >>>>>>>> >>>>>>>> My guess is that it's a file that has preallocated a large amount >>>>>>>> of space, but that has not fully used it yet. NTFS allows this. If you >>>>>>>> read the file, TSK will only show you the space that is used. Reading the >>>>>>>> slack, gives you the rest. >>>>>>>> >>>>>>>> If you run 'istat' on one of these files and send it along, we can >>>>>>>> confirm. >>>>>>>> >>>>>>>> thanks, >>>>>>>> brian >>>>>>>> >>>>>>>> >>>>>>>> On Tue, Jan 31, 2017 at 7:04 AM, Luís Filipe Nassif < >>>>>>>> lfc...@gm...> wrote: >>>>>>>> >>>>>>>>> Hi folks, >>>>>>>>> >>>>>>>>> I am upgrading to tsk-4.4 to benefit from the new support to >>>>>>>>> slackfiles from java bindings. But I noticed some slackfiles larger than >>>>>>>>> the cluster size (4k) are created in database. Some of them have megabytes >>>>>>>>> of size and its contents are accessible. Is it expected to have slackfiles >>>>>>>>> larger than cluster size? Could someone explain? >>>>>>>>> >>>>>>>>> Thanks, >>>>>>>>> Luis Nassif >>>>>>>>> >>>>>>>>> ------------------------------------------------------------ >>>>>>>>> ------------------ >>>>>>>>> Check out the vibrant tech community on one of the world's most >>>>>>>>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >>>>>>>>> _______________________________________________ >>>>>>>>> sleuthkit-users mailing list >>>>>>>>> https://lists.sourceforge.net/lists/listinfo/sleuthkit-users >>>>>>>>> http://www.sleuthkit.org >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> > |
From: Luís F. N. <lfc...@gm...> - 2017-02-01 17:30:59
|
Thank you, Brian, for the change! I think VSC file content will be accessible now! And to clarify, I was a bit confused about the slack size of 2.026.496 bytes, because the allocated size of the system.LOG file was not shown in istat output. But I confirmed with another tool that the allocated size of system.LOG is 2.027.520 bytes and with only 1024 bytes of logical size that give us 2.026.496 bytes for the slack size. So everything was ok! Thanks again! Luis 2017-02-01 15:06 GMT-02:00 Brian Carrier <ca...@sl...>: > This fix is now in the develop-4.4 branch. We'll merge it into develop > after we do a few other minor things on this branch. > > > On Wed, Feb 1, 2017 at 11:38 AM, Brian Carrier <ca...@sl...> > wrote: > >> Ughh. I need to better start documenting these scenarios because I >> always get confused by them too. >> >> I think you've found an issue and I created #756 ( >> https://github.com/sleuthkit/sleuthkit/issues/756) to address this. >> >> The summary of your specific questions are: >> - VSC is strange because WIndows seems to treat it differently and lies >> about initsize. It has initsize of 0, but a file size that is equal to the >> allocsize. >> - In the log file case, 4096 has been initialized, but the allocated size >> of the file is 2MB. >> >> >> >> >> >> >> >> >> On Tue, Jan 31, 2017 at 7:26 PM, Luís Filipe Nassif <lfc...@gm...> >> wrote: >> >>> Thank you, Brian, for your explanation! No problem for our application, >>> just curious to know if it was a bug or, if not, why it is there. >>> >>> But, currently, no slack files are created for VSC files and other files >>> with initsize smaller than allocated size. I thought slack is created only >>> when allocated > logical size (based on line 1001 of db_sqlite.cpp) >>> >>> And is the allocated size 4096 from istat output? I do not know where >>> the slack size of 2.026.496 bytes came from... >>> >>> 2017-01-31 18:05 GMT-02:00 Brian Carrier <ca...@sl...>: >>> >>>> Actually, making this decision could incur some significant overhead >>>> for a step that (at least in Autopsy) we try to keep as fast as possible. >>>> Is your application impacted by the fact that there is a large and empty >>>> slack file or were you just curious if it was a bug? >>>> >>>> >>>> >>>> On Tue, Jan 31, 2017 at 2:54 PM, Brian Carrier <ca...@sl...> >>>> wrote: >>>> >>>>> Yea, this looks like "VDL Slack". Same general idea as in Issue 466 ( >>>>> https://github.com/sleuthkit/sleuthkit/issues/466), but in this case >>>>> the file has 1K of initialized size. >>>>> >>>>> I suppose this "slack" file is a bit wasted though because no blocks >>>>> were allocated to it. So, there will be no real content for it. >>>>> >>>>> I'll make an internal story to keep track of this and maybe Ann will >>>>> be able to take a look at not making these if they are going to be all for >>>>> address 0. >>>>> >>>>> >>>>> >>>>> On Tue, Jan 31, 2017 at 10:55 AM, Luís Filipe Nassif < >>>>> lfc...@gm...> wrote: >>>>> >>>>>> Hi Brian, >>>>>> >>>>>> Thank you very much for your attention. The output of >>>>>> FsContent.getMetaDataText() (equals to istat right?) is below. The >>>>>> system.LOG-slack size is 2.026.496 bytes and system.LOG size is 1024 bytes. >>>>>> >>>>>> details of /img_PC-HP.dd/vol_vol2/WINDOWS >>>>>> /system32/config/system.LOG-slack >>>>>> >>>>>> MFT Entry Header Values: >>>>>> Entry: 4106 Sequence: 1 >>>>>> $LogFile Sequence Number: 79246281526 >>>>>> Allocated File >>>>>> Links: 1 >>>>>> >>>>>> $STANDARD_INFORMATION Attribute Values: >>>>>> Flags: Hidden, Archive >>>>>> Owner ID: 0 >>>>>> Security ID: 281 (S-1-5-32-544) >>>>>> Last User Journal Update Sequence Number: 105272096 >>>>>> Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>>> File Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) >>>>>> MFT Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) >>>>>> Accessed: 2011-09-16 14:33:38.187500000 (Hora oficial do Brasil) >>>>>> >>>>>> $FILE_NAME Attribute Values: >>>>>> Flags: Hidden, Archive >>>>>> Name: system.LOG >>>>>> Parent MFT Entry: 3982 Sequence: 2 >>>>>> Allocated Size: 4096 Actual Size: 1024 >>>>>> Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>>> File Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>>> MFT Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>>> Accessed: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>>> >>>>>> $ATTRIBUTE_LIST Attribute Values: >>>>>> Type: 16-0 MFT Entry: 4106 VCN: 0 >>>>>> Type: 48-4 MFT Entry: 4106 VCN: 0 >>>>>> Type: 128-0 MFT Entry: 40678 VCN: 0 >>>>>> >>>>>> Attributes: >>>>>> Type: $STANDARD_INFORMATION (16-0) Name: N/A Resident size: 72 >>>>>> Type: $ATTRIBUTE_LIST (32-5) Name: N/A Resident size: 96 >>>>>> Type: $FILE_NAME (48-4) Name: N/A Resident size: 86 >>>>>> Type: $DATA (128-6) Name: N/A Non-Resident size: 1024 >>>>>> init_size: 1024 >>>>>> 847844 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 0 >>>>>> 0 0 0 0 0 0 0 >>>>>> >>>>>> 2017-01-31 12:56 GMT-02:00 Brian Carrier <ca...@sl...>: >>>>>> >>>>>>> Hi Luis, >>>>>>> >>>>>>> My guess is that it's a file that has preallocated a large amount of >>>>>>> space, but that has not fully used it yet. NTFS allows this. If you read >>>>>>> the file, TSK will only show you the space that is used. Reading the >>>>>>> slack, gives you the rest. >>>>>>> >>>>>>> If you run 'istat' on one of these files and send it along, we can >>>>>>> confirm. >>>>>>> >>>>>>> thanks, >>>>>>> brian >>>>>>> >>>>>>> >>>>>>> On Tue, Jan 31, 2017 at 7:04 AM, Luís Filipe Nassif < >>>>>>> lfc...@gm...> wrote: >>>>>>> >>>>>>>> Hi folks, >>>>>>>> >>>>>>>> I am upgrading to tsk-4.4 to benefit from the new support to >>>>>>>> slackfiles from java bindings. But I noticed some slackfiles larger than >>>>>>>> the cluster size (4k) are created in database. Some of them have megabytes >>>>>>>> of size and its contents are accessible. Is it expected to have slackfiles >>>>>>>> larger than cluster size? Could someone explain? >>>>>>>> >>>>>>>> Thanks, >>>>>>>> Luis Nassif >>>>>>>> >>>>>>>> ------------------------------------------------------------ >>>>>>>> ------------------ >>>>>>>> Check out the vibrant tech community on one of the world's most >>>>>>>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >>>>>>>> _______________________________________________ >>>>>>>> sleuthkit-users mailing list >>>>>>>> https://lists.sourceforge.net/lists/listinfo/sleuthkit-users >>>>>>>> http://www.sleuthkit.org >>>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> > |
From: Brian C. <ca...@sl...> - 2017-02-01 17:12:43
|
This fix is now in the develop-4.4 branch. We'll merge it into develop after we do a few other minor things on this branch. On Wed, Feb 1, 2017 at 11:38 AM, Brian Carrier <ca...@sl...> wrote: > Ughh. I need to better start documenting these scenarios because I always > get confused by them too. > > I think you've found an issue and I created #756 ( > https://github.com/sleuthkit/sleuthkit/issues/756) to address this. > > The summary of your specific questions are: > - VSC is strange because WIndows seems to treat it differently and lies > about initsize. It has initsize of 0, but a file size that is equal to the > allocsize. > - In the log file case, 4096 has been initialized, but the allocated size > of the file is 2MB. > > > > > > > > > On Tue, Jan 31, 2017 at 7:26 PM, Luís Filipe Nassif <lfc...@gm...> > wrote: > >> Thank you, Brian, for your explanation! No problem for our application, >> just curious to know if it was a bug or, if not, why it is there. >> >> But, currently, no slack files are created for VSC files and other files >> with initsize smaller than allocated size. I thought slack is created only >> when allocated > logical size (based on line 1001 of db_sqlite.cpp) >> >> And is the allocated size 4096 from istat output? I do not know where the >> slack size of 2.026.496 bytes came from... >> >> 2017-01-31 18:05 GMT-02:00 Brian Carrier <ca...@sl...>: >> >>> Actually, making this decision could incur some significant overhead for >>> a step that (at least in Autopsy) we try to keep as fast as possible. Is >>> your application impacted by the fact that there is a large and empty slack >>> file or were you just curious if it was a bug? >>> >>> >>> >>> On Tue, Jan 31, 2017 at 2:54 PM, Brian Carrier <ca...@sl...> >>> wrote: >>> >>>> Yea, this looks like "VDL Slack". Same general idea as in Issue 466 ( >>>> https://github.com/sleuthkit/sleuthkit/issues/466), but in this case >>>> the file has 1K of initialized size. >>>> >>>> I suppose this "slack" file is a bit wasted though because no blocks >>>> were allocated to it. So, there will be no real content for it. >>>> >>>> I'll make an internal story to keep track of this and maybe Ann will be >>>> able to take a look at not making these if they are going to be all for >>>> address 0. >>>> >>>> >>>> >>>> On Tue, Jan 31, 2017 at 10:55 AM, Luís Filipe Nassif < >>>> lfc...@gm...> wrote: >>>> >>>>> Hi Brian, >>>>> >>>>> Thank you very much for your attention. The output of >>>>> FsContent.getMetaDataText() (equals to istat right?) is below. The >>>>> system.LOG-slack size is 2.026.496 bytes and system.LOG size is 1024 bytes. >>>>> >>>>> details of /img_PC-HP.dd/vol_vol2/WINDOWS >>>>> /system32/config/system.LOG-slack >>>>> >>>>> MFT Entry Header Values: >>>>> Entry: 4106 Sequence: 1 >>>>> $LogFile Sequence Number: 79246281526 >>>>> Allocated File >>>>> Links: 1 >>>>> >>>>> $STANDARD_INFORMATION Attribute Values: >>>>> Flags: Hidden, Archive >>>>> Owner ID: 0 >>>>> Security ID: 281 (S-1-5-32-544) >>>>> Last User Journal Update Sequence Number: 105272096 >>>>> Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>> File Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) >>>>> MFT Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) >>>>> Accessed: 2011-09-16 14:33:38.187500000 (Hora oficial do Brasil) >>>>> >>>>> $FILE_NAME Attribute Values: >>>>> Flags: Hidden, Archive >>>>> Name: system.LOG >>>>> Parent MFT Entry: 3982 Sequence: 2 >>>>> Allocated Size: 4096 Actual Size: 1024 >>>>> Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>> File Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>> MFT Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>> Accessed: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>>> >>>>> $ATTRIBUTE_LIST Attribute Values: >>>>> Type: 16-0 MFT Entry: 4106 VCN: 0 >>>>> Type: 48-4 MFT Entry: 4106 VCN: 0 >>>>> Type: 128-0 MFT Entry: 40678 VCN: 0 >>>>> >>>>> Attributes: >>>>> Type: $STANDARD_INFORMATION (16-0) Name: N/A Resident size: 72 >>>>> Type: $ATTRIBUTE_LIST (32-5) Name: N/A Resident size: 96 >>>>> Type: $FILE_NAME (48-4) Name: N/A Resident size: 86 >>>>> Type: $DATA (128-6) Name: N/A Non-Resident size: 1024 >>>>> init_size: 1024 >>>>> 847844 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 0 >>>>> 0 0 0 0 0 0 0 >>>>> >>>>> 2017-01-31 12:56 GMT-02:00 Brian Carrier <ca...@sl...>: >>>>> >>>>>> Hi Luis, >>>>>> >>>>>> My guess is that it's a file that has preallocated a large amount of >>>>>> space, but that has not fully used it yet. NTFS allows this. If you read >>>>>> the file, TSK will only show you the space that is used. Reading the >>>>>> slack, gives you the rest. >>>>>> >>>>>> If you run 'istat' on one of these files and send it along, we can >>>>>> confirm. >>>>>> >>>>>> thanks, >>>>>> brian >>>>>> >>>>>> >>>>>> On Tue, Jan 31, 2017 at 7:04 AM, Luís Filipe Nassif < >>>>>> lfc...@gm...> wrote: >>>>>> >>>>>>> Hi folks, >>>>>>> >>>>>>> I am upgrading to tsk-4.4 to benefit from the new support to >>>>>>> slackfiles from java bindings. But I noticed some slackfiles larger than >>>>>>> the cluster size (4k) are created in database. Some of them have megabytes >>>>>>> of size and its contents are accessible. Is it expected to have slackfiles >>>>>>> larger than cluster size? Could someone explain? >>>>>>> >>>>>>> Thanks, >>>>>>> Luis Nassif >>>>>>> >>>>>>> ------------------------------------------------------------ >>>>>>> ------------------ >>>>>>> Check out the vibrant tech community on one of the world's most >>>>>>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >>>>>>> _______________________________________________ >>>>>>> sleuthkit-users mailing list >>>>>>> https://lists.sourceforge.net/lists/listinfo/sleuthkit-users >>>>>>> http://www.sleuthkit.org >>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> > |
From: D R. <da...@gm...> - 2017-02-01 17:05:32
|
Don't wish to interrupt but, I find those that use TSK are very familiar with the tool along with knowing more under the Hood about forensics than other forums such as those for guidance tools. Not disrespecting those folks, just see those posting on this forum, being at a higher level. And thanks for showing me how much I still need to learn and how informative this group is. Just my two cents. Dean On Wed, Feb 1, 2017, 09:43 Brian Carrier <ca...@sl...> wrote: > Ughh. I need to better start documenting these scenarios because I always > get confused by them too. > > I think you've found an issue and I created #756 ( > https://github.com/sleuthkit/sleuthkit/issues/756) to address this. > > The summary of your specific questions are: > - VSC is strange because WIndows seems to treat it differently and lies > about initsize. It has initsize of 0, but a file size that is equal to the > allocsize. > - In the log file case, 4096 has been initialized, but the allocated size > of the file is 2MB. > > > > > > > > > On Tue, Jan 31, 2017 at 7:26 PM, Luís Filipe Nassif <lfc...@gm...> > wrote: > > Thank you, Brian, for your explanation! No problem for our application, > just curious to know if it was a bug or, if not, why it is there. > > But, currently, no slack files are created for VSC files and other files > with initsize smaller than allocated size. I thought slack is created only > when allocated > logical size (based on line 1001 of db_sqlite.cpp) > > And is the allocated size 4096 from istat output? I do not know where the > slack size of 2.026.496 bytes came from... > > 2017-01-31 18:05 GMT-02:00 Brian Carrier <ca...@sl...>: > > Actually, making this decision could incur some significant overhead for a > step that (at least in Autopsy) we try to keep as fast as possible. Is > your application impacted by the fact that there is a large and empty slack > file or were you just curious if it was a bug? > > > > On Tue, Jan 31, 2017 at 2:54 PM, Brian Carrier <ca...@sl...> > wrote: > > Yea, this looks like "VDL Slack". Same general idea as in Issue 466 ( > https://github.com/sleuthkit/sleuthkit/issues/466), but in this case the > file has 1K of initialized size. > > I suppose this "slack" file is a bit wasted though because no blocks were > allocated to it. So, there will be no real content for it. > > I'll make an internal story to keep track of this and maybe Ann will be > able to take a look at not making these if they are going to be all for > address 0. > > > > On Tue, Jan 31, 2017 at 10:55 AM, Luís Filipe Nassif <lfc...@gm...> > wrote: > > Hi Brian, > > Thank you very much for your attention. The output of > FsContent.getMetaDataText() (equals to istat right?) is below. The > system.LOG-slack size is 2.026.496 bytes and system.LOG size is 1024 bytes. > > details of /img_PC-HP.dd/vol_vol2/WINDOWS/system32/config/system.LOG-slack > > MFT Entry Header Values: > Entry: 4106 Sequence: 1 > $LogFile Sequence Number: 79246281526 > Allocated File > Links: 1 > > $STANDARD_INFORMATION Attribute Values: > Flags: Hidden, Archive > Owner ID: 0 > Security ID: 281 (S-1-5-32-544) > Last User Journal Update Sequence Number: 105272096 > Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) > File Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) > MFT Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) > Accessed: 2011-09-16 14:33:38.187500000 (Hora oficial do Brasil) > > $FILE_NAME Attribute Values: > Flags: Hidden, Archive > Name: system.LOG > Parent MFT Entry: 3982 Sequence: 2 > Allocated Size: 4096 Actual Size: 1024 > Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) > File Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) > MFT Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) > Accessed: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) > > $ATTRIBUTE_LIST Attribute Values: > Type: 16-0 MFT Entry: 4106 VCN: 0 > Type: 48-4 MFT Entry: 4106 VCN: 0 > Type: 128-0 MFT Entry: 40678 VCN: 0 > > Attributes: > Type: $STANDARD_INFORMATION (16-0) Name: N/A Resident size: 72 > Type: $ATTRIBUTE_LIST (32-5) Name: N/A Resident size: 96 > Type: $FILE_NAME (48-4) Name: N/A Resident size: 86 > Type: $DATA (128-6) Name: N/A Non-Resident size: 1024 init_size: > 1024 > 847844 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 > > 2017-01-31 12:56 GMT-02:00 Brian Carrier <ca...@sl...>: > > Hi Luis, > > My guess is that it's a file that has preallocated a large amount of > space, but that has not fully used it yet. NTFS allows this. If you read > the file, TSK will only show you the space that is used. Reading the > slack, gives you the rest. > > If you run 'istat' on one of these files and send it along, we can confirm. > > thanks, > brian > > > On Tue, Jan 31, 2017 at 7:04 AM, Luís Filipe Nassif <lfc...@gm...> > wrote: > > Hi folks, > > I am upgrading to tsk-4.4 to benefit from the new support to slackfiles > from java bindings. But I noticed some slackfiles larger than the cluster > size (4k) are created in database. Some of them have megabytes of size and > its contents are accessible. Is it expected to have slackfiles larger than > cluster size? Could someone explain? > > Thanks, > Luis Nassif > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > sleuthkit-users mailing list > https://lists.sourceforge.net/lists/listinfo/sleuthkit-users > http://www.sleuthkit.org > > > > > > > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > sleuthkit-users mailing list > https://lists.sourceforge.net/lists/listinfo/sleuthkit-users > http://www.sleuthkit.org > |
From: Brian C. <ca...@sl...> - 2017-02-01 16:38:29
|
Ughh. I need to better start documenting these scenarios because I always get confused by them too. I think you've found an issue and I created #756 ( https://github.com/sleuthkit/sleuthkit/issues/756) to address this. The summary of your specific questions are: - VSC is strange because WIndows seems to treat it differently and lies about initsize. It has initsize of 0, but a file size that is equal to the allocsize. - In the log file case, 4096 has been initialized, but the allocated size of the file is 2MB. On Tue, Jan 31, 2017 at 7:26 PM, Luís Filipe Nassif <lfc...@gm...> wrote: > Thank you, Brian, for your explanation! No problem for our application, > just curious to know if it was a bug or, if not, why it is there. > > But, currently, no slack files are created for VSC files and other files > with initsize smaller than allocated size. I thought slack is created only > when allocated > logical size (based on line 1001 of db_sqlite.cpp) > > And is the allocated size 4096 from istat output? I do not know where the > slack size of 2.026.496 bytes came from... > > 2017-01-31 18:05 GMT-02:00 Brian Carrier <ca...@sl...>: > >> Actually, making this decision could incur some significant overhead for >> a step that (at least in Autopsy) we try to keep as fast as possible. Is >> your application impacted by the fact that there is a large and empty slack >> file or were you just curious if it was a bug? >> >> >> >> On Tue, Jan 31, 2017 at 2:54 PM, Brian Carrier <ca...@sl...> >> wrote: >> >>> Yea, this looks like "VDL Slack". Same general idea as in Issue 466 ( >>> https://github.com/sleuthkit/sleuthkit/issues/466), but in this case >>> the file has 1K of initialized size. >>> >>> I suppose this "slack" file is a bit wasted though because no blocks >>> were allocated to it. So, there will be no real content for it. >>> >>> I'll make an internal story to keep track of this and maybe Ann will be >>> able to take a look at not making these if they are going to be all for >>> address 0. >>> >>> >>> >>> On Tue, Jan 31, 2017 at 10:55 AM, Luís Filipe Nassif < >>> lfc...@gm...> wrote: >>> >>>> Hi Brian, >>>> >>>> Thank you very much for your attention. The output of >>>> FsContent.getMetaDataText() (equals to istat right?) is below. The >>>> system.LOG-slack size is 2.026.496 bytes and system.LOG size is 1024 bytes. >>>> >>>> details of /img_PC-HP.dd/vol_vol2/WINDOWS/system32/config/system.LOG-sl >>>> ack >>>> >>>> MFT Entry Header Values: >>>> Entry: 4106 Sequence: 1 >>>> $LogFile Sequence Number: 79246281526 >>>> Allocated File >>>> Links: 1 >>>> >>>> $STANDARD_INFORMATION Attribute Values: >>>> Flags: Hidden, Archive >>>> Owner ID: 0 >>>> Security ID: 281 (S-1-5-32-544) >>>> Last User Journal Update Sequence Number: 105272096 >>>> Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>> File Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) >>>> MFT Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) >>>> Accessed: 2011-09-16 14:33:38.187500000 (Hora oficial do Brasil) >>>> >>>> $FILE_NAME Attribute Values: >>>> Flags: Hidden, Archive >>>> Name: system.LOG >>>> Parent MFT Entry: 3982 Sequence: 2 >>>> Allocated Size: 4096 Actual Size: 1024 >>>> Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>> File Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>> MFT Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>> Accessed: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>>> >>>> $ATTRIBUTE_LIST Attribute Values: >>>> Type: 16-0 MFT Entry: 4106 VCN: 0 >>>> Type: 48-4 MFT Entry: 4106 VCN: 0 >>>> Type: 128-0 MFT Entry: 40678 VCN: 0 >>>> >>>> Attributes: >>>> Type: $STANDARD_INFORMATION (16-0) Name: N/A Resident size: 72 >>>> Type: $ATTRIBUTE_LIST (32-5) Name: N/A Resident size: 96 >>>> Type: $FILE_NAME (48-4) Name: N/A Resident size: 86 >>>> Type: $DATA (128-6) Name: N/A Non-Resident size: 1024 init_size: >>>> 1024 >>>> 847844 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 0 >>>> 0 0 0 0 0 0 0 >>>> >>>> 2017-01-31 12:56 GMT-02:00 Brian Carrier <ca...@sl...>: >>>> >>>>> Hi Luis, >>>>> >>>>> My guess is that it's a file that has preallocated a large amount of >>>>> space, but that has not fully used it yet. NTFS allows this. If you read >>>>> the file, TSK will only show you the space that is used. Reading the >>>>> slack, gives you the rest. >>>>> >>>>> If you run 'istat' on one of these files and send it along, we can >>>>> confirm. >>>>> >>>>> thanks, >>>>> brian >>>>> >>>>> >>>>> On Tue, Jan 31, 2017 at 7:04 AM, Luís Filipe Nassif < >>>>> lfc...@gm...> wrote: >>>>> >>>>>> Hi folks, >>>>>> >>>>>> I am upgrading to tsk-4.4 to benefit from the new support to >>>>>> slackfiles from java bindings. But I noticed some slackfiles larger than >>>>>> the cluster size (4k) are created in database. Some of them have megabytes >>>>>> of size and its contents are accessible. Is it expected to have slackfiles >>>>>> larger than cluster size? Could someone explain? >>>>>> >>>>>> Thanks, >>>>>> Luis Nassif >>>>>> >>>>>> ------------------------------------------------------------ >>>>>> ------------------ >>>>>> Check out the vibrant tech community on one of the world's most >>>>>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >>>>>> _______________________________________________ >>>>>> sleuthkit-users mailing list >>>>>> https://lists.sourceforge.net/lists/listinfo/sleuthkit-users >>>>>> http://www.sleuthkit.org >>>>>> >>>>>> >>>>> >>>> >>> >> > |
From: Luís F. N. <lfc...@gm...> - 2017-02-01 00:26:34
|
Thank you, Brian, for your explanation! No problem for our application, just curious to know if it was a bug or, if not, why it is there. But, currently, no slack files are created for VSC files and other files with initsize smaller than allocated size. I thought slack is created only when allocated > logical size (based on line 1001 of db_sqlite.cpp) And is the allocated size 4096 from istat output? I do not know where the slack size of 2.026.496 bytes came from... 2017-01-31 18:05 GMT-02:00 Brian Carrier <ca...@sl...>: > Actually, making this decision could incur some significant overhead for a > step that (at least in Autopsy) we try to keep as fast as possible. Is > your application impacted by the fact that there is a large and empty slack > file or were you just curious if it was a bug? > > > > On Tue, Jan 31, 2017 at 2:54 PM, Brian Carrier <ca...@sl...> > wrote: > >> Yea, this looks like "VDL Slack". Same general idea as in Issue 466 ( >> https://github.com/sleuthkit/sleuthkit/issues/466), but in this case the >> file has 1K of initialized size. >> >> I suppose this "slack" file is a bit wasted though because no blocks were >> allocated to it. So, there will be no real content for it. >> >> I'll make an internal story to keep track of this and maybe Ann will be >> able to take a look at not making these if they are going to be all for >> address 0. >> >> >> >> On Tue, Jan 31, 2017 at 10:55 AM, Luís Filipe Nassif <lfc...@gm... >> > wrote: >> >>> Hi Brian, >>> >>> Thank you very much for your attention. The output of >>> FsContent.getMetaDataText() (equals to istat right?) is below. The >>> system.LOG-slack size is 2.026.496 bytes and system.LOG size is 1024 bytes. >>> >>> details of /img_PC-HP.dd/vol_vol2/WINDOWS/system32/config/system.LOG-sl >>> ack >>> >>> MFT Entry Header Values: >>> Entry: 4106 Sequence: 1 >>> $LogFile Sequence Number: 79246281526 >>> Allocated File >>> Links: 1 >>> >>> $STANDARD_INFORMATION Attribute Values: >>> Flags: Hidden, Archive >>> Owner ID: 0 >>> Security ID: 281 (S-1-5-32-544) >>> Last User Journal Update Sequence Number: 105272096 >>> Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>> File Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) >>> MFT Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) >>> Accessed: 2011-09-16 14:33:38.187500000 (Hora oficial do Brasil) >>> >>> $FILE_NAME Attribute Values: >>> Flags: Hidden, Archive >>> Name: system.LOG >>> Parent MFT Entry: 3982 Sequence: 2 >>> Allocated Size: 4096 Actual Size: 1024 >>> Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>> File Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>> MFT Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>> Accessed: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >>> >>> $ATTRIBUTE_LIST Attribute Values: >>> Type: 16-0 MFT Entry: 4106 VCN: 0 >>> Type: 48-4 MFT Entry: 4106 VCN: 0 >>> Type: 128-0 MFT Entry: 40678 VCN: 0 >>> >>> Attributes: >>> Type: $STANDARD_INFORMATION (16-0) Name: N/A Resident size: 72 >>> Type: $ATTRIBUTE_LIST (32-5) Name: N/A Resident size: 96 >>> Type: $FILE_NAME (48-4) Name: N/A Resident size: 86 >>> Type: $DATA (128-6) Name: N/A Non-Resident size: 1024 init_size: >>> 1024 >>> 847844 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 0 >>> 0 0 0 0 0 0 0 >>> >>> 2017-01-31 12:56 GMT-02:00 Brian Carrier <ca...@sl...>: >>> >>>> Hi Luis, >>>> >>>> My guess is that it's a file that has preallocated a large amount of >>>> space, but that has not fully used it yet. NTFS allows this. If you read >>>> the file, TSK will only show you the space that is used. Reading the >>>> slack, gives you the rest. >>>> >>>> If you run 'istat' on one of these files and send it along, we can >>>> confirm. >>>> >>>> thanks, >>>> brian >>>> >>>> >>>> On Tue, Jan 31, 2017 at 7:04 AM, Luís Filipe Nassif < >>>> lfc...@gm...> wrote: >>>> >>>>> Hi folks, >>>>> >>>>> I am upgrading to tsk-4.4 to benefit from the new support to >>>>> slackfiles from java bindings. But I noticed some slackfiles larger than >>>>> the cluster size (4k) are created in database. Some of them have megabytes >>>>> of size and its contents are accessible. Is it expected to have slackfiles >>>>> larger than cluster size? Could someone explain? >>>>> >>>>> Thanks, >>>>> Luis Nassif >>>>> >>>>> ------------------------------------------------------------ >>>>> ------------------ >>>>> Check out the vibrant tech community on one of the world's most >>>>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >>>>> _______________________________________________ >>>>> sleuthkit-users mailing list >>>>> https://lists.sourceforge.net/lists/listinfo/sleuthkit-users >>>>> http://www.sleuthkit.org >>>>> >>>>> >>>> >>> >> > |
From: Brian C. <ca...@sl...> - 2017-01-31 20:21:05
|
Yea, this looks like "VDL Slack". Same general idea as in Issue 466 ( https://github.com/sleuthkit/sleuthkit/issues/466), but in this case the file has 1K of initialized size. I suppose this "slack" file is a bit wasted though because no blocks were allocated to it. So, there will be no real content for it. I'll make an internal story to keep track of this and maybe Ann will be able to take a look at not making these if they are going to be all for address 0. On Tue, Jan 31, 2017 at 10:55 AM, Luís Filipe Nassif <lfc...@gm...> wrote: > Hi Brian, > > Thank you very much for your attention. The output of > FsContent.getMetaDataText() (equals to istat right?) is below. The > system.LOG-slack size is 2.026.496 bytes and system.LOG size is 1024 bytes. > > details of /img_PC-HP.dd/vol_vol2/WINDOWS/system32/config/system.LOG-slack > > MFT Entry Header Values: > Entry: 4106 Sequence: 1 > $LogFile Sequence Number: 79246281526 > Allocated File > Links: 1 > > $STANDARD_INFORMATION Attribute Values: > Flags: Hidden, Archive > Owner ID: 0 > Security ID: 281 (S-1-5-32-544) > Last User Journal Update Sequence Number: 105272096 > Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) > File Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) > MFT Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) > Accessed: 2011-09-16 14:33:38.187500000 (Hora oficial do Brasil) > > $FILE_NAME Attribute Values: > Flags: Hidden, Archive > Name: system.LOG > Parent MFT Entry: 3982 Sequence: 2 > Allocated Size: 4096 Actual Size: 1024 > Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) > File Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) > MFT Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) > Accessed: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) > > $ATTRIBUTE_LIST Attribute Values: > Type: 16-0 MFT Entry: 4106 VCN: 0 > Type: 48-4 MFT Entry: 4106 VCN: 0 > Type: 128-0 MFT Entry: 40678 VCN: 0 > > Attributes: > Type: $STANDARD_INFORMATION (16-0) Name: N/A Resident size: 72 > Type: $ATTRIBUTE_LIST (32-5) Name: N/A Resident size: 96 > Type: $FILE_NAME (48-4) Name: N/A Resident size: 86 > Type: $DATA (128-6) Name: N/A Non-Resident size: 1024 init_size: > 1024 > 847844 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 > > 2017-01-31 12:56 GMT-02:00 Brian Carrier <ca...@sl...>: > >> Hi Luis, >> >> My guess is that it's a file that has preallocated a large amount of >> space, but that has not fully used it yet. NTFS allows this. If you read >> the file, TSK will only show you the space that is used. Reading the >> slack, gives you the rest. >> >> If you run 'istat' on one of these files and send it along, we can >> confirm. >> >> thanks, >> brian >> >> >> On Tue, Jan 31, 2017 at 7:04 AM, Luís Filipe Nassif <lfc...@gm...> >> wrote: >> >>> Hi folks, >>> >>> I am upgrading to tsk-4.4 to benefit from the new support to slackfiles >>> from java bindings. But I noticed some slackfiles larger than the cluster >>> size (4k) are created in database. Some of them have megabytes of size and >>> its contents are accessible. Is it expected to have slackfiles larger than >>> cluster size? Could someone explain? >>> >>> Thanks, >>> Luis Nassif >>> >>> ------------------------------------------------------------ >>> ------------------ >>> Check out the vibrant tech community on one of the world's most >>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >>> _______________________________________________ >>> sleuthkit-users mailing list >>> https://lists.sourceforge.net/lists/listinfo/sleuthkit-users >>> http://www.sleuthkit.org >>> >>> >> > |
From: Brian C. <ca...@sl...> - 2017-01-31 20:12:21
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Actually, making this decision could incur some significant overhead for a step that (at least in Autopsy) we try to keep as fast as possible. Is your application impacted by the fact that there is a large and empty slack file or were you just curious if it was a bug? On Tue, Jan 31, 2017 at 2:54 PM, Brian Carrier <ca...@sl...> wrote: > Yea, this looks like "VDL Slack". Same general idea as in Issue 466 ( > https://github.com/sleuthkit/sleuthkit/issues/466), but in this case the > file has 1K of initialized size. > > I suppose this "slack" file is a bit wasted though because no blocks were > allocated to it. So, there will be no real content for it. > > I'll make an internal story to keep track of this and maybe Ann will be > able to take a look at not making these if they are going to be all for > address 0. > > > > On Tue, Jan 31, 2017 at 10:55 AM, Luís Filipe Nassif <lfc...@gm...> > wrote: > >> Hi Brian, >> >> Thank you very much for your attention. The output of >> FsContent.getMetaDataText() (equals to istat right?) is below. The >> system.LOG-slack size is 2.026.496 bytes and system.LOG size is 1024 bytes. >> >> details of /img_PC-HP.dd/vol_vol2/WINDOWS/system32/config/system.LOG- >> slack >> >> MFT Entry Header Values: >> Entry: 4106 Sequence: 1 >> $LogFile Sequence Number: 79246281526 >> Allocated File >> Links: 1 >> >> $STANDARD_INFORMATION Attribute Values: >> Flags: Hidden, Archive >> Owner ID: 0 >> Security ID: 281 (S-1-5-32-544) >> Last User Journal Update Sequence Number: 105272096 >> Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >> File Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) >> MFT Modified: 2011-09-16 14:33:38.375000000 (Hora oficial do Brasil) >> Accessed: 2011-09-16 14:33:38.187500000 (Hora oficial do Brasil) >> >> $FILE_NAME Attribute Values: >> Flags: Hidden, Archive >> Name: system.LOG >> Parent MFT Entry: 3982 Sequence: 2 >> Allocated Size: 4096 Actual Size: 1024 >> Created: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >> File Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >> MFT Modified: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >> Accessed: 2004-09-02 08:00:12.000000000 (Hora oficial do Brasil) >> >> $ATTRIBUTE_LIST Attribute Values: >> Type: 16-0 MFT Entry: 4106 VCN: 0 >> Type: 48-4 MFT Entry: 4106 VCN: 0 >> Type: 128-0 MFT Entry: 40678 VCN: 0 >> >> Attributes: >> Type: $STANDARD_INFORMATION (16-0) Name: N/A Resident size: 72 >> Type: $ATTRIBUTE_LIST (32-5) Name: N/A Resident size: 96 >> Type: $FILE_NAME (48-4) Name: N/A Resident size: 86 >> Type: $DATA (128-6) Name: N/A Non-Resident size: 1024 init_size: >> 1024 >> 847844 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 0 >> 0 0 0 0 0 0 0 >> >> 2017-01-31 12:56 GMT-02:00 Brian Carrier <ca...@sl...>: >> >>> Hi Luis, >>> >>> My guess is that it's a file that has preallocated a large amount of >>> space, but that has not fully used it yet. NTFS allows this. If you read >>> the file, TSK will only show you the space that is used. Reading the >>> slack, gives you the rest. >>> >>> If you run 'istat' on one of these files and send it along, we can >>> confirm. >>> >>> thanks, >>> brian >>> >>> >>> On Tue, Jan 31, 2017 at 7:04 AM, Luís Filipe Nassif <lfc...@gm... >>> > wrote: >>> >>>> Hi folks, >>>> >>>> I am upgrading to tsk-4.4 to benefit from the new support to slackfiles >>>> from java bindings. But I noticed some slackfiles larger than the cluster >>>> size (4k) are created in database. Some of them have megabytes of size and >>>> its contents are accessible. Is it expected to have slackfiles larger than >>>> cluster size? Could someone explain? >>>> >>>> Thanks, >>>> Luis Nassif >>>> >>>> ------------------------------------------------------------ >>>> ------------------ >>>> Check out the vibrant tech community on one of the world's most >>>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >>>> _______________________________________________ >>>> sleuthkit-users mailing list >>>> https://lists.sourceforge.net/lists/listinfo/sleuthkit-users >>>> http://www.sleuthkit.org >>>> >>>> >>> >> > |