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Microsoft Security Intelligence
Published Oct 24, 2012 | Updated Sep 15, 2017


Detected by Microsoft Defender Antivirus

Aliases: Win32/TojanDownloader.Necurs.B (ESET) (Kaspersky)


Microsoft security software detects and removes this family of threats.

This family of malware work together to download other malware, including threats from the Win32/Sirefef and Win32/Medfos families. They can also give a malicious hacker backdoor access and control of your PC.

These threats can be installed at the same time as rogue security software, such as Rogue:Win32/Winwebsec.

We have seen the Necurs family being installed by variants of the Blacole family, the Win32/Beebone family, the Win32/Zbot family, and the Win32/Dorkbot family.

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.

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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