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Microsoft Security Intelligence
Published Apr 03, 2012 | Updated Sep 15, 2017

Trojan:JS/Medfos.C

Detected by Microsoft Defender Antivirus

Aliases: JS/Redirector.NIQ trojan (ESET) Trojan.JS.Medfos (Ikarus)

Summary

Windows Defender Antivirus detects and removes this threat. 

This threat can redirect your search engine queries when you use the Mozilla Firefox web browser.  

It can be installed by Trojan:Win32/Medfos.B.

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.

Remove browser add-ons

You may need to remove add-ons from your browser:

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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