Combat the hackers with ‘Simple Site Audit Multisite’ website protection.
With SSAM installed, you will be notified by email of any file changes that occur on your monitored sites.
SSAM will detect files that have been added, removed or modified and if file permissions are changed. You will be able to automatically monitor all your sites from one ‘Master’ web site.
Your sites can be monitored for hacker activity without any detectable monitoring system on the sites themselves...