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ThreatExpert's Statistics for W32/Rbot-Gen [Sophos]:

W32/Rbot-Gen [Sophos] is also known as:
Threat AliasNumber of Incidents
Backdoor.Win32.Rbot [Ikarus]1
Backdoor:Win32/Rbot.gen [Microsoft]1
Exploit-DcomRpc.gen [McAfee]1
Trojan.IRCBot [PC Tools]1
W32.IRCBot [Symantec]1
Win32/IRCBot.worm.Gen [AhnLab]1

W32/Rbot-Gen [Sophos] is known to be created as:
%System%\winiogon.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).