Unhide

unhide - forensic tool to find hidden processes and ports

Unhide is a forensic tool to find processes and TCP/UDP ports hidden by rootkits, Linux kernel modules or by other techniques. It includes two utilities: unhide and unhide-tcp.

unhide detects hidden processes using the following six techniques

• Compare /proc vs /bin/ps output
• Compare info gathered from /bin/ps with info gathered by walking thru the procfs.
• Compare info gathered from /bin/ps with info gathered from syscalls (syscall scanning).
• Full PIDs space occupation (PIDs bruteforcing)
• Reverse search, verify that all thread seen by ps are also seen by the kernel (/bin/ps output vs /proc, procfs walking and syscall)
• Quick compare /proc, procfs walking and syscall vs /bin/ps output

unhide-tcp identifies TCP/UDP ports that are listening but are not listed in /bin/netstat through brute forcing of all TCP/UDP ports available.

This package can be used by rkhunter in its daily scans.

This package is useful for network security checks, in addition to forensics investigations.