This is a symptom of the Troj/Haxdoor-CA Trojan. Here is a link to some information about it:BC Database - Troj/Haxdoor-CA
Here is also a detailed description from Sophos: Sophos Description
This could have compromised your system and led to more infections so I suggest posting a HijackThis log in the HJT Logs and Analysis Forum. Here is a link to that Forum: HJT Forum
Please follow the preparation directions and try not to alter your system until you receive help from one of our HJT Team Members. The preparation directions are found at the following link:Prep Guide for Posting HJT LogsPlease note: Do not try to fix any problems with HJT yourself. This is an advanced tool and requires expert analysis.
Please be patient until somone assists you, it may take a couple of days. But, it's FREE