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Alert level: Severe Detected with Windows Defender Antivirus
Also detected as: Rootkit.ZeroAccess.Gen.4 (VirusBuster) Trojan.Sirefef.FZ (BitDefender) Trojan.Win32.Sirefef (Ikarus) Trojan.Win32.Zapchast.acao (Kaspersky) ZeroAccess.eh (McAfee) Troj/Sirefef-AZ (Sophos) TROJ_SIREFEF.EM (Trend Micro)
This family of malware uses stealth to hide its presence on your PC. Trojans in this family can do different things, including:
- Downloading and running other files
- Contacting remote hosts
- Disabling security features
Members of the family can also change search results, which can generate money for the attackers who use Sirefef.
Variants of Win32/Sirefef may be installed by other malware, including variants of the Trojan:Win32/Necurs family.
For more information, please see the Win32/Sirefef family description.