Lynis - Security auditing tool for systems running Linux, macOS, BSD, and other UNIX-based systems.
Malwarebytes Anti-Rootkit - Malwarebytes Anti-Rootkit is a rootkit removal program by the Malwarebytes best known for providing the antimalware program.
Silverback - Silverback 3
McAfee Stinger - McAfee Stinger is a single purpose program designed to detect and remove the specific virus from the system.
Chkrootkit - Chkrootkit is a Linux tool to locally check for signs of a rootkit. It contains:
TDSSKiller - Kaspersky Lab has developed the TDSSKiller utility that allows removing rootkits.