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Alert level: Severe Detected with Windows Defender Antivirus
Also detected as: W32/Troj_Generic.UUZF (Norman) Rootkit.ZeroAccess.Gen.4 (VirusBuster) Trojan horse Crypt.AQLW (AVG) TR/Sirefef.BV.2 (Avira) Trojan.Sirefef.BV (BitDefender) BackDoor.Maxplus.3710 (Dr.Web) Trojan.Sirefef (Ikarus) ZeroAccess (McAfee) Troj/ZAccess-AH (Sophos) Trojan.Zeroaccess!inf (Symantec) TROJ_ZACCESS.CQJ (Trend Micro)
Trojan:Win32/Sirefef.AC is a component of Win32/Sirefef - a multi-component family of malware that moderates your Internet experience by changing search results and generating pay-per-click advertising revenue for its controllers. The family consists of multiple parts that perform different functions, such as downloading updates and additional components, hiding existing components, or performing a payload.