Published Apr 07, 2005 | Updated Apr 16, 2011


Severe |Detected with Windows Defender Antivirus

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


Win32/Dumaru is a family of mass-mailing worms that targets certain versions of Microsoft Windows. The worm sends itself as an e-mail attachment to addresses that it finds on the infected computer. The worm runs when the user opens the attachment. Some variants drop a backdoor Trojan. Win32/Dumaru can infect or overwrite files, open ports, connect to an IRC server, release passwords and other confidential information, and receive commands from attackers.
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 will detect and remove this threat:
For more information on antivirus software, see
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