Virus:TR/Dldr.CodecPack.mhf
Date discovered:26/07/2010
Type:Trojan
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:247.296 Bytes
MD5 checksum:6cd79e8b6d413a9fb08dc0cea4390e58
IVDF version:7.10.09.219 - Monday, July 26, 2010

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Mcafee: Downloader-CEW.f
   •  Kaspersky: Trojan-Downloader.Win32.CodecPack.mhf
   •  Microsoft: TrojanDownloader:Win32/Renos.LN
   •  Eset: Win32/TrojanDownloader.FakeAlert.BAW
   •  AhnLab: Win-Trojan/Fakeav.247296.G
   •  DrWeb: Trojan.Siggen1.41281


Platforms / OS:
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows Server 2008
   • Windows 7


Side effects:
   • Registry modification

 Registry The following registry keys are added in order to load the service after reboot:

– [HKLM\SYSTEM\ControlSet001\Services\SSHNAS\Parameters]
   • "ServiceDll"=hex(2):63,00,3a,00,5c,00,78,00,78,00,78,00,5c,00,74,00,72,00,2e,00,64,00,6c,00,6c,00,00,00



The following registry key is changed:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost]
   Old value:
   • "netsvcs"=hex(7):36,00,74,00,6f,00,34,00,00,00,41,00,70,00,70,00,4d,00,67,00,\
      6d,00,74,00,00,00,41,00,75,00,64,00,69,00,6f,00,53,00,72,00,76,00,00,00,42,\
      00,72,00,6f,00,77,00,73,00,65,00,72,00,00,00,43,00,72,00,79,00,70,00,74,00,\
      53,00,76,00,63,00,00,00,44,00,4d,00,53,00,65,00,72,00,76,00,65,00,72,00,00,\
      00,44,00,48,00,43,00,50,00,00,00,45,00,52,00,53,00,76,00,63,00,00,00,45,00,\
      76,00,65,00,6e,00,74,00,53,00,79,00,73,00,74,00,65,00,6d,00,00,00,46,00,61,\
      00,73,00,74,00,55,00,73,00,65,00,72,00,53,00,77,00,69,00,74,00,63,00,68,00,\
      69,00,6e,00,67,00,43,00,6f,00,6d,00,70,00,61,00,74,00,69,00,62,00,69,00,6c,\
      00,69,00,74,00,79,00,00,00,48,00,69,00,64,00,53,00,65,00,72,00,76,00,00,00,\
      49,00,61,00,73,00,00,00,49,00,70,00,72,00,69,00,70,00,00,00,49,00,72,00,6d,\
      00,6f,00,6e,00,00,00,4c,00,61,00,6e,00,6d,00,61,00,6e,00,53,00,65,00,72,00,\
      76,00,65,00,72,00,00,00,4c,00,61,00,6e,00,6d,00,61,00,6e,00,57,00,6f,00,72,\
      00,6b,00,73,00,74,00,61,00,74,00,69,00,6f,00,6e,00,00,00,4d,00,65,00,73,00,\
      73,00,65,00,6e,00,67,00,65,00,72,00,00,00,4e,00,65,00,74,00,6d,00,61,00,6e,\
      00,00,00,4e,00,6c,00,61,00,00,00,4e,00,74,00,6d,00,73,00,73,00,76,00,63,00,\
      00,00,4e,00,57,00,43,00,57,00,6f,00,72,00,6b,00,73,00,74,00,61,00,74,00,69,\
      00,6f,00,6e,00,00,00,4e,00,77,00,73,00,61,00,70,00,61,00,67,00,65,00,6e,00,\
      74,00,00,00,52,00,61,00,73,00,61,00,75,00,74,00,6f,00,00,00,52,00,61,00,73,\
      00,6d,00,61,00,6e,00,00,00,52,00,65,00,6d,00,6f,00,74,00,65,00,61,00,63,00,\
      63,00,65,00,73,00,73,00,00,00,53,00,63,00,68,00,65,00,64,00,75,00,6c,00,65,\
      00,00,00,53,00,65,00,63,00,6c,00,6f,00,67,00,6f,00,6e,00,00,00,53,00,45,00,\
      4e,00,53,00,00,00,53,00,68,00,61,00,72,00,65,00,64,00,61,00,63,00,63,00,65,\
      00,73,00,73,00,00,00,53,00,52,00,53,00,65,00,72,00,76,00,69,00,63,00,65,00,\
      00,00,54,00,61,00,70,00,69,00,73,00,72,00,76,00,00,00,54,00,68,00,65,00,6d,\
      00,65,00,73,00,00,00,54,00,72,00,6b,00,57,00,6b,00,73,00,00,00,57,00,33,00,\
      32,00,54,00,69,00,6d,00,65,00,00,00,57,00,5a,00,43,00,53,00,56,00,43,00,00,\
      00,57,00,6d,00,69,00,00,00,57,00,6d,00,64,00,6d,00,50,00,6d,00,53,00,70,00,\
      00,00,77,00,69,00,6e,00,6d,00,67,00,6d,00,74,00,00,00,54,00,65,00,72,00,6d,\
      00,53,00,65,00,72,00,76,00,69,00,63,00,65,00,00,00,77,00,75,00,61,00,75,00,\
      73,00,65,00,72,00,76,00,00,00,42,00,49,00,54,00,53,00,00,00,53,00,68,00,65,\
      00,6c,00,6c,00,48,00,57,00,44,00,65,00,74,00,65,00,63,00,74,00,69,00,6f,00,\
      6e,00,00,00,68,00,65,00,6c,00,70,00,73,00,76,00,63,00,00,00,78,00,6d,00,6c,\
      00,70,00,72,00,6f,00,76,00,00,00,77,00,73,00,63,00,73,00,76,00,63,00,00,00,\
      57,00,6d,00,64,00,6d,00,50,00,6d,00,53,00,4e,00,00,00,00,00
   New value:
   • "netsvcs"=hex(7):36,00,74,00,6f,00,34,00,00,00,41,00,70,00,70,00,4d,00,67,00,\
      6d,00,74,00,00,00,41,00,75,00,64,00,69,00,6f,00,53,00,72,00,76,00,00,00,42,\
      00,72,00,6f,00,77,00,73,00,65,00,72,00,00,00,43,00,72,00,79,00,70,00,74,00,\
      53,00,76,00,63,00,00,00,44,00,4d,00,53,00,65,00,72,00,76,00,65,00,72,00,00,\
      00,44,00,48,00,43,00,50,00,00,00,45,00,52,00,53,00,76,00,63,00,00,00,45,00,\
      76,00,65,00,6e,00,74,00,53,00,79,00,73,00,74,00,65,00,6d,00,00,00,46,00,61,\
      00,73,00,74,00,55,00,73,00,65,00,72,00,53,00,77,00,69,00,74,00,63,00,68,00,\
      69,00,6e,00,67,00,43,00,6f,00,6d,00,70,00,61,00,74,00,69,00,62,00,69,00,6c,\
      00,69,00,74,00,79,00,00,00,48,00,69,00,64,00,53,00,65,00,72,00,76,00,00,00,\
      49,00,61,00,73,00,00,00,49,00,70,00,72,00,69,00,70,00,00,00,49,00,72,00,6d,\
      00,6f,00,6e,00,00,00,4c,00,61,00,6e,00,6d,00,61,00,6e,00,53,00,65,00,72,00,\
      76,00,65,00,72,00,00,00,4c,00,61,00,6e,00,6d,00,61,00,6e,00,57,00,6f,00,72,\
      00,6b,00,73,00,74,00,61,00,74,00,69,00,6f,00,6e,00,00,00,4d,00,65,00,73,00,\
      73,00,65,00,6e,00,67,00,65,00,72,00,00,00,4e,00,65,00,74,00,6d,00,61,00,6e,\
      00,00,00,4e,00,6c,00,61,00,00,00,4e,00,74,00,6d,00,73,00,73,00,76,00,63,00,\
      00,00,4e,00,57,00,43,00,57,00,6f,00,72,00,6b,00,73,00,74,00,61,00,74,00,69,\
      00,6f,00,6e,00,00,00,4e,00,77,00,73,00,61,00,70,00,61,00,67,00,65,00,6e,00,\
      74,00,00,00,52,00,61,00,73,00,61,00,75,00,74,00,6f,00,00,00,52,00,61,00,73,\
      00,6d,00,61,00,6e,00,00,00,52,00,65,00,6d,00,6f,00,74,00,65,00,61,00,63,00,\
      63,00,65,00,73,00,73,00,00,00,53,00,63,00,68,00,65,00,64,00,75,00,6c,00,65,\
      00,00,00,53,00,65,00,63,00,6c,00,6f,00,67,00,6f,00,6e,00,00,00,53,00,45,00,\
      4e,00,53,00,00,00,53,00,68,00,61,00,72,00,65,00,64,00,61,00,63,00,63,00,65,\
      00,73,00,73,00,00,00,53,00,52,00,53,00,65,00,72,00,76,00,69,00,63,00,65,00,\
      00,00,54,00,61,00,70,00,69,00,73,00,72,00,76,00,00,00,54,00,68,00,65,00,6d,\
      00,65,00,73,00,00,00,54,00,72,00,6b,00,57,00,6b,00,73,00,00,00,57,00,33,00,\
      32,00,54,00,69,00,6d,00,65,00,00,00,57,00,5a,00,43,00,53,00,56,00,43,00,00,\
      00,57,00,6d,00,69,00,00,00,57,00,6d,00,64,00,6d,00,50,00,6d,00,53,00,70,00,\
      00,00,77,00,69,00,6e,00,6d,00,67,00,6d,00,74,00,00,00,54,00,65,00,72,00,6d,\
      00,53,00,65,00,72,00,76,00,69,00,63,00,65,00,00,00,77,00,75,00,61,00,75,00,\
      73,00,65,00,72,00,76,00,00,00,42,00,49,00,54,00,53,00,00,00,53,00,68,00,65,\
      00,6c,00,6c,00,48,00,57,00,44,00,65,00,74,00,65,00,63,00,74,00,69,00,6f,00,\
      6e,00,00,00,68,00,65,00,6c,00,70,00,73,00,76,00,63,00,00,00,78,00,6d,00,6c,\
      00,70,00,72,00,6f,00,76,00,00,00,77,00,73,00,63,00,73,00,76,00,63,00,00,00,\
      57,00,6d,00,64,00,6d,00,50,00,6d,00,53,00,4e,00,00,00,53,00,53,00,48,00,4e,\
      00,41,00,53,00,00,00,00,00

Description inserted by Patrick Schoenherr on Thursday, July 29, 2010
Description updated by Patrick Schoenherr on Thursday, July 29, 2010

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