Well, either my family member got it, or I did by downloading something from The Sims 3 website (A PC video game).
MBAM found it and said it successfully removed it.
Malwarebytes' Anti-Malware 1.44
Database version: 3896
Windows 6.0.6001 Service Pack 1
Internet Explorer 8.0.6001.18882
3/21/2010 6:47:46 PM
mbam-log-2010-03-21 (18-47-46).txt
Scan type: Quick Scan
Objects scanned: 107925
Time elapsed: 6 minute(s), 13 second(s)
Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 1
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0
Memory Processes Infected:
(No malicious items detected)
Memory Modules Infected:
(No malicious items detected)
Registry Keys Infected:
(No malicious items detected)
Registry Values Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\protect_ie (Backdoor.Celofot) -> Quarantined and deleted successfully.
Registry Data Items Infected:
(No malicious items detected)
Folders Infected:
(No malicious items detected)
Files Infected:
(No malicious items detected)
How can I be sure this is truly gone?
I'm going to do another scan now...
Thanks in advance!
