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ThreatExpert's Statistics for Mal/Zapchas-C [Sophos]:

Mal/Zapchas-C [Sophos] is also known as:
Threat AliasNumber of Incidents
Backdoor.IRC.Zapchast [Ikarus]153
IRC/Flood.gen.b [McAfee]141
Backdoor.IRC.Zapchast.zwrc [Kaspersky Lab]137
mIRC/Zapchast [AhnLab]49
Backdoor.IRC.Zapchast [Kaspersky Lab]16
Backdoor.IRC.Aladinz [Symantec]14
Backdoor.IRC.Zapchast [PC Tools]9
Backdoor:IRC/IRCFlood [Microsoft]3
Backdoor.IRC.Zapchast.h [Kaspersky Lab]2
mIRC/Zapchas [AhnLab]2
BackDoor-GI.ini [McAfee]1