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Microsoft Security Intelligence
Published Oct 18, 2013 | Updated Sep 15, 2017

Trojan:Win32/Sefnit!cfg

Detected by Microsoft Defender Antivirus

Aliases: No associated aliases

Summary

Windows Defender detects and removes this threat.

It is a file used by Trojan:Win32/Sefnit.gen!D, which is part of the Win32/Sefnit family of trojans. These trojans can let a hacker access your PC, download files, and use your PC and Internet connection for click fraud.

This threat might have gotten on your PC from a bad or infected file on the eMule peer-to-peer network.

Find out ways that malware can get on your PC.  

The following free Microsoft software detects and removes this threat:

Even if we've already detected and removed this particular threat, running a full scan might find other malware that is hiding on your PC.

You can also visit the Microsoft virus and malware community or our advanced troubleshooting page for more help.

If you’re using Windows XP, see our Windows XP end of support page.

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