chkrootkit

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chkrootkit
chkrootkit on Linux
chrootkit on Linux
Developer(s) Pangeia Informatica
Stable release 0.50 / Jun 4, 2014
Operating system Linux, FreeBSD, OpenBSD, NetBSD, Solaris, HP-UX, Tru64, BSD/OS, Mac OS X
Type Rootkit Detector
Website www.chkrootkit.org

chkrootkit (Check Rootkit) is a common Unix-based program intended to help system administrators check their system for known rootkits. It is a shell script using common UNIX/Linux tools like the strings and grep commands to search core system programs for signatures and for comparing a traversal of the /proc filesystem with the output of the ps (process status) command to look for discrepancies.

It can be used from a "rescue disc" (typically a Live CD) or it can optionally use an alternative directory from which to run all of its own commands. These techniques allow chkrootkit to trust the commands upon which it depends a bit more.

There are inherent limitations to the reliability of any program that attempts to detect compromises (such as rootkits and computer viruses). Newer rootkits may specifically attempt to detect and compromise copies of the chkrootkit programs or take other measures to evade detection by them.

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