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Microsoft Security Intelligence
Published Jun 17, 2009 | Updated Sep 15, 2017


Detected by Microsoft Defender Antivirus

Aliases: INF/Frethog (CA) Worm.Win32.AutoRun.rja (Kaspersky) Mal/AutoInf-B (Sophos) INF.Autorun.Gen (VirusBuster) Trojan.AutorunINF.Gen (BitDefender)


Windows Defender detects and removes this threat.

This threat can spread using removable drives, such as USB flash drives. When you connect the drive to your PC, the worm is run automatically.

Find out ways that malware can get on your PC.  

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

You should also run a full scan. A full scan might find other 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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