Published Jun 19, 2012|Updated Sep 15, 2017

Trojan:Win64/Sirefef.P

Alert level: Severe Detected with Windows Defender Antivirus

Also detected as: Trojan.Sirefef.FS (BitDefender) Win64/Sirefef.W (ESET) HEUR:Backdoor.Win64.Generic (Kaspersky) ZeroAccess (McAfee) Troj/Sirefef-AP (Sophos) TROJ_SIREFEF.RB (Trend Micro)

Windows Defender detects and removes this threat.

It is a user-mode component of Win32/Sirefef - a multi-component family of malware that meddles with your Internet experience by changing search results and generating pay-per-click advertising revenue for its controllers. The family consists of multiple parts that do different functions, like downloading updates and additional components, hiding existing components, or doing a payload.

 

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