Published Apr 14, 2005 | Updated Sep 15, 2017


Severe |Detected with Windows Defender Antivirus

Aliases: W32/Bugbear.gen@MM (McAfee) W32.Bugbear@mm (Symantec)


Windows Defender Antivirus detects and removes this threat.
Win32/Bugbear is a family of mass-mailing network worms that targets computers running certain versions of Microsoft Windows.
The worm spreads through email and network shares. It can also spread by infecting files in folders of file-sharing applications. The worm drops a Trojan to gather data from the infected computer and opens a port on the computer to receive commands from attackers.

Use the following free Microsoft software to detect and remove this threat:

You should also run a full scan. A full scan might find hidden malware.

Get more help

You can also visit our advanced troubleshooting page or search the Microsoft virus and malware community for more help.

If you’re using Windows XP, see our Windows XP end of support page.

Follow us