Open Source C Keyloggers

Acoustic Soundboard is a free, open source program for Windows which strives to be easy to use and lightweight. The main purpose is to conveniently play audio files to others while allowing the user to hear what is playing and still use their microphone normally. There is no installation required, simply unzip the contents wherever you like. On closing, the soundboard will automatically save the user's last devices, sounds, and hotkeys to a database file. View a demo video here https://www.youtube.com/watch?v=cPdncc-q1oM If you want others to hear your microphone and the sounds you play, you will first need to install a virtual audio cable such as this one: https://vb-audio.com/Cable/ IMPORTANT: Windows may warn you that this program contains a virus because it hooks the keyboard. Your data stays on your computer only. Please see the readme for more information.

LKL is a userspace keylogger that runs under Linux on the x86 arch. LKL logs everything that passes through the hardware keyboard port (0x60). It translates keycodes to ASCII with a keymap file.

A Linux kernel module to sniff keystrokes and saving it in an in memory buffer for further reading from /dev/klg

Linux X.Org Record Extension C Keylogger.

Troyano de conexion inversa desarrollado en C++ & Visual Basic 6.0, con codigo abierto.

Keylogger Hooks is a project designed to teach the implementation of keyloggers using hooks on Windows machines. Associated blog located at http://www.progproj.net.

A basic keylogger developed by Alpha.Aetsu (New version in March-April on 2010)

WindowsNT 5.x kernel driver designed to hide things like: processes, files, network connections and open ports. It also provides keylogger and communication with userspace tool that is authenticated with password.

A Linux kernel module to grab keys pressed in the keyboard, or a keylogger. keysniffer was initially written with the US keyboard (and conforming laptops) in mind. By default it shows human-readable strings for the keys pressed. However, as keyboards evolved, more keys got added. So the module now supports a module parameter codes which shows the keycode shift_mask pair in hex (codes=1) or decimal (codes=2). You can lookup the keycodes in /usr/include/linux/input-event-codes.h. The keypress logs are recorded in debugfs as long as the module is loaded. Only root or sudoers can read the log. The module name has been camouflaged to blend-in with other kernel modules. You can, however, execute a script at shutdown or reboot (the procedure would be distro-specific) to save the keys to a file. DISCLAIMER: keysniffer is intended to track your own devices and NOT to trespass on others. The author has never used it to compromise any third-party device and is not responsible for any

Dieser Keylogger benutzt SetWindowsHookEx(), und operiert recht nahe am eigentlichen Tastaturtreiber. Es ist keine Auslagerung von Code in eine DLL nötig, allerdings muß das Programm die ganze Zeit laufen.

ttyrpld is a multi-OS kernel-level TTY keylogger and screenlogger with (a)synchronous replay support. It runs on Linux, Solaris, FreeBSD, NetBSD and OpenBSD.