This would be better suited in the Security forum.. requesting relocation.
What leads you to believe your system has been compromised ?
Do you have any evidence to support your suspicions ? Log entries, etc..
Have you run any tools to see if there is a rootkit on your system ?
http://www.chkrootkit.org/ - Check Rootkit
http://www.rootkit.nl/projects/rootkit_hunter.html - rootkit hunter
If you can verify your system has been compromised have you pulled it offline ?
Image the system for later analysis,wipe the system completely and reload clean.