I recently got tricked downloading a fake file that contain a backdoor trojan called "Beast 2.01", appearingly Norton AV & some others have not learned it is floating around so they didn't help.

Here's how to get rid of it.

1. Keep your firewall up, do not allow any unfamilar programs to contact the attacker's web site.

2. Go to this page to learn what to do, http://battleforums.com/history/show/25372.html

3. Also you may want to delete the reg. key it added to your registry. Go to RUN then type REGEDIT. Go down the list until you find HKEY_LOCAL_Machine\Software\Microsoft\Windows\Curr entVersion\Policie\Explorer\Run\"COM Service" = "c:\Windows\MSAGENT\msdcxa.com".