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Microsoft Security Intelligence
Published Nov 09, 2004 | Updated Aug 15, 2011


Detected by Microsoft Defender Antivirus

Aliases: W32.Mydoom@mm (Symantec) W32/Mydoom@MM (McAfee) WORM_MYDOOM (Trend Micro) Win32.Mydoom (CA)


Win32/Mydoom is a family of mass-mailing worms that spread through e-mail. Some variants also spread through peer-to-peer networks. The worm acts as a backdoor Trojan, which allows an attacker to access the infected system. This backdoor may be used to distribute other malicious software. Some variants of Win32/Mydoom launch denial of service (DoS) attacks against specific Web sites. 

To detect and remove this threat and other malicious software that may be installed on your computer, run a full-system scan with an appropriate, up-to-date, security solution. The following Microsoft products detect and remove this threat:

For more information on antivirus software, see

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