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ThreatExpert's Statistics for Trojan.Win32.Sirefef [Ikarus]:

Trojan.Win32.Sirefef [Ikarus] is also known as:
Threat AliasNumber of Incidents
Trojan Horse [Symantec]38
Mal/Generic-A [Sophos]37
New Win32.g5 [McAfee]30
Generic.dx!bht [McAfee]12
Trojan.Win32.Agent.csaf [Kaspersky Lab]12
Trojan:Win32/Sirefef.A [Microsoft]6
Trojan:Win32/Sirefef.B [Microsoft]3
Generic.dx!ffx [McAfee]1
Mal/Crot-A [Sophos]1
Troj/Sirefef-A [Sophos]1
Trojan.Win32.Sirefef.a [Kaspersky Lab]1
Trojan:Win32/Sirefef.gen!C [Microsoft]1
Trojan:WinNT/Sirefef.A [Microsoft]1

Trojan.Win32.Sirefef [Ikarus] has the following possible country of origin:
OriginNumber of Incidents
Russian Federation24