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Microsoft Security Intelligence
Published Feb 14, 2005 | Updated Sep 15, 2017


Detected by Microsoft Defender Antivirus

Aliases: Win32.Sobig (CA) W32.Sobig@mm (Symantec) Sobig (F-secure) I-Worm.Win32.Sobig (Global Hauri) Sobig (Panda) W32/Sobig (Sophos) W32/Sobig@mm (Norman) WORM_SOBIG (Trend Micro) W32/Sobig@MM (McAfee)


Windows Defender Antivirus detects and removes this threat.
Sobig is a family of mass-mailing worms that target PCs running certain versions of Microsoft Windows.
The worm sends itself to email addresses that it finds on the infected PC. The worm may also spread to writeable network shares.

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.

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