I've done a search, here is the description of your virus.
Actually it has backdoor capabilities, so take care:
http://securityresponse.symantec.com...wbot.worm.html
In case you don't care about that and only want to remove it, here are the removal instructions found on that page. In case you are not using Norton just do it with your AV.
Quote:
Update the virus definitions, restart in Safe mode, and run a full system scan. Delete all files that Norton AntiVirus detects as W32.Kwbot.Worm.
Delete the value
Windows Explorer Update Build 1142
from the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\Run
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\RunServices
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And in future always check .exe / .com files before running them