Linux

// Unhide (ps)

Detecting hidden processes. Implements 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

Identify TCP/UDP ports that are listening but not listed in /bin/netstat doing brute forcing of all TCP/UDP ports availables.