Virus:TR/Dldr.Zbot.AT.17
Date discovered:16/08/2010
Type:Trojan
Subtype:Downloader
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:191.488 Bytes
MD5 checksum:2d1be3ed44f7360C8a63c0bffb6e4100
IVDF version:7.10.10.203 - Tuesday, August 17, 2010

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Mcafee: Heuristic.BehavesLike.Win32.Spyware.H
   •  F-Secure: Suspicious:W32/Malware!Gemini
   •  Sophos: Mal/FakeAV-CX
   •  Sunbelt: VirTool.Win32.Obfuscator.hg!b
   •  AhnLab: Trojan/Win32.FakeAV
   •  Ikarus: Trojan-Downloader.Win32.CodecPack


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:
   • Drops a file
   • Lowers security settings
   • Registry modification

 Files It deletes the initially executed copy of itself.



The following file is created:

– %WINDIR%\Tasks\%CLSID%.job Furthermore it gets executed after it was fully created. File is a scheduled task that runs the malware at predefined times.

 Registry One of the following values is added in order to run the process after reboot:

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "%random character string%"="%current directory%\%executed file%"



The following registry keys are added:

– [HKCU\Software\XML]
– [HKCU\Software\Microsoft\MediaPlayer\Health]
– [HKCU\Software\Microsoft\MediaPlayer\Health\%CLSID%]
– [HKCU\Software\%random character string%]
   • "UhuH"="%random character string%"
   • "UhuS"="%random character string%"
   • "UdiH"=dword:01cabc4b
   • "UdiB"=dword:506b2a50
   • "Udi0"=dword:00000001

Description inserted by Carlos Valero Llabata on Wednesday, August 18, 2010
Description updated by Carlos Valero Llabata on Wednesday, August 18, 2010

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