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Virus:TR/Dldr.Agent.bgyr
Date discovered:09/02/2009
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:226.304 Bytes
MD5 checksum:b111fc8a70862ccbcf0646bba99fb4cb
IVDF version:7.01.01.244 - Monday, February 9, 2009

 General Method of propagation:
• Autorun feature


Aliases:
   •  Mcafee: W32/Autorun.worm.g virus
   •  Sophos: Mal/Generic-A
   •  Panda: W32/IRCBot.CJI
   •  Eset: Win32/Agent.NFM
   •  Bitdefender: Trojan.Dropper.Agent.UJA


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following location:
   • %drive%\vshost.exe



The following files are created:

%drive%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

%TEMPDIR%\Lady_Eats_Her_Shit--www.youtube.com Further investigation pointed out that this file is malware, too. Detected as: TR/Agent.bpix

– %recycle bin%\%CLSID%\winservices.exe Further investigation pointed out that this file is malware, too. Detected as: TR/Agent.bpix

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

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "Windows Service help"="%recycle bin%\%CLSID%\winservices.exe"

 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Petre Galan on Monday, November 16, 2009
Description updated by Petre Galan on Monday, November 16, 2009

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