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Microsoft Security Intelligence
Published Aug 15, 2011 | Updated Sep 15, 2017


Detected by Microsoft Defender Antivirus

Aliases: No associated aliases


Windows Defender detects and removes this threat.

Win32/Magistr is a family of mass-mailing worms that spread by sending themselves as an email attachment to addresses found on an infected PC.

It is also a memory resident polymorphic file infector that searches and infects files with .EXE and .SCR file extensions found on the local file system, as well as in the shared folders on the local area network.

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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