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Virus:Worm/Koobface.aej
Date discovered:15/07/2009
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:15.360 Bytes
MD5 checksum:8fc2e9e715ab829a68b0b8bef3a61b45
IVDF version:7.01.04.236 - Wednesday, July 15, 2009

 General Aliases:
   •  Mcafee: W32/Koobface.worm.gen.e
   •  Sophos: Mal/Generic-A
   •  Panda: W32/Koobface.GW.worm
   •  Eset: Win32/Koobface.NBH
   •  Bitdefender: Win32.Worm.Koobface.ANQ


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


Side effects:
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following location:
   • %WINDIR%\pp10.exe



It deletes the initially executed copy of itself.



It deletes the following file:
   • %WINDIR%\3456665.bat



The following files are created:

%WINDIR%\934fdfg34fgjf23 This is a non malicious text file with the following content:
   • %code that runs malware%

%WINDIR%\3456665.bat Furthermore it gets executed after it was fully created. This batch file is used to delete a file.

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

–  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "pp"="%WINDIR%\pp10.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 Friday, March 12, 2010
Description updated by Petre Galan on Friday, March 12, 2010

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