In response to ongoing reports from the US Dept. of Homeland Security about hacking of government networks and destructive malware that is threatening US critical infrastructure, cyber security expert Philip Lieberman, president of Lieberman Software said:

Many organizations are seeing that some degree of contamination creeps into the rights structure of their file system, possibly because of technical contamination resulting from changes in the server on which the system runs (switching from Novell to NT4 then to Windows 2003 and on to Windows 2008, etc.), or it could also be the result of changes in the organization when IT services are centralized or departments merge.