Virus:TR/BHO.gfu
Date discovered:02/09/2008
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low
Damage Potential:Low to medium
Static file:No
File size:155.648 Bytes
IVDF version:7.00.06.106 - Tuesday, September 2, 2008

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Symantec: Trojan.Zlob
   •  Mcafee: Puper trojan
   •  Kaspersky: Trojan-Downloader.Win32.BHO.sz
   •  F-Secure: Trojan-Downloader.Win32.BHO.sz
   •  Sophos: Mal/FakeAV-D
   •  Panda: Adware/WebSearch
   •  Eset: Win32/TrojanDownloader.FakeAlert.IC trojan


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Registry modification

 Registry The following registry key is added in order to run the process after reboot:

– [HKCR\CLSID\{709d3024-e53d-4627-b8d8-740df2058cce}\InprocServer32]
   • @="%malware execution directory%\%malware dll%"
   • "ThreadingModel"="Apartment"



It registers a browser helper object (BHO) by adding the following keys:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\
   Browser Helper Objects\{cb287b37-cd29-45dc-b85b-8d6ff14b9f91}]
   • @="CodecPlugin Class"
   • "NoExplorer"=dword:00000001



The following registry keys are added:

– [HKCR\CLSID\{709d3024-e53d-4627-b8d8-740df2058cce}]
   • @="XMLDOMDocumentEventsSink Class"
   • "AppID"="{bc849b24-f887-4368-bb77-939d069a3517}"

– [HKCR\CLSID\{709d3024-e53d-4627-b8d8-740df2058cce}\ProgID]
   • @="CodecBHO.XMLDOMDocumentEventsSink.1"

– [HKCR\CLSID\{709d3024-e53d-4627-b8d8-740df2058cce}\TypeLib]
   • @="{7b2a5567-a549-42fc-b870-a5e35dca583b}"

– [HKCR\CLSID\{709d3024-e53d-4627-b8d8-740df2058cce}\
   VersionIndependentProgID]
   • @="CodecBHO.XMLDOMDocumentEventsSink"

 File details Programming language:
 The malware program was written in MS Visual C++.

Description inserted by Thomas Wegele on Tuesday, October 28, 2008
Description updated by Thomas Wegele on Tuesday, October 28, 2008

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