Virus:Worm/Koobface.cmc
Date discovered:20/11/2009
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:58.368 Bytes
MD5 checksum:b79bc24bf58fc5d50d4fa0ebe63c816a
IVDF version:7.10.01.37 - Friday, November 20, 2009

 General Aliases:
   •  Mcafee: W32/Koobface.worm.gen.d
   •  Panda: W32/Koobface.GJ.worm
   •  Eset: Win32/Koobface.NCL
   •  Bitdefender: Worm.Generic.100585


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


Side effects:
   • Downloads a malicious file
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following location:
   • %WINDIR%\freddy75.exe



It deletes the initially executed copy of itself.



It deletes the following files:
   • C:\vx\sd.dat
   • %WINDIR%\dxxdv34567.bat
   • c:\3.reg



The following files are created:

– %WINDIR%\dxxdv34567.bat Furthermore it gets executed after it was fully created. This batch file is used to delete a file.
– %WINDIR%\bk23567.dat



It tries to download a file:

– The locations are the following:
   • http://drpaulaprice.com/**********/?action=fbgen&v=75
   • http://elenailyina.com/**********/?getexe=fb.101.exe
   • http://www.jallabyah.com/**********/?action=fbgen&v=75
   • http://www.jallabyah.com/**********/?action=fbgen&mode=s&age=47&a=544453496&v=75&ie=6.0.2800.1106
At the time of writing this file was not online for further investigation.

 Registry The following registry key is changed:

– [HKLM\SYSTEM\CurrentControlSet\Hardware Profiles\0001\Software\
   Microsoft\windows\CurrentVersion\Internet Settings]
   New value:
   • "ProxyEnable"=dword:0x00000000

 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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