Recourse ManTrap 1.6 hides the first 4 processes that run on a Solaris system, which allows attackers to determine that they are in a honeypot system.
https://exchange.xforce.ibmcloud.com/vulnerabilities/5473
http://marc.info/?l=bugtraq&m=97349791405580&w=2
http://archives.neohapsis.com/archives/bugtraq/2000-11/0100.html