Virus:Worm/Koobface.aek
Date discovered:06/07/2009
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:70.656 Bytes
MD5 checksum:5c5812dd9fb5d1be88bc1c937f28ee09
IVDF version:7.01.04.183 - Monday, July 6, 2009

 General Aliases:
   •  Bitdefender: Trojan.Agent.APVQ
   •  Panda: Trj/Gamania.MR
   •  Eset: Win32/PSW.OnLineGames.NWC


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


Side effects:
   • Drops malicious files
   • Registry modification

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



It deletes the initially executed copy of itself.



The following file is created:

– %SYSDIR%\dionpis.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Spy.Gen

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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "dionpis"="%WINDIR%\dionpis.exe"

 Injection –  It injects the following file into a process: %SYSDIR%\dionpis.dll

    Process name:
   • explorer.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 Thursday, August 26, 2010
Description updated by Petre Galan on Thursday, August 26, 2010

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