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ThreatExpert's Statistics for Backdoor:Win32/Delf.SG [Microsoft]:

Backdoor:Win32/Delf.SG [Microsoft] is also known as:
Threat AliasNumber of Incidents
Generic BackDoor!dv [McAfee]4
Mal/Generic-A [Sophos]4
Trojan-PWS.Win32.Lmir.mw [Ikarus]4
Win-Trojan/Xema.variant [AhnLab]4
Trojan Horse [Symantec]2

Backdoor:Win32/Delf.SG [Microsoft] is known to be created as:
%System%\plugins\helper\alsrvn.exe
Note: %System% is a variable that refers to the System folder. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).