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Date discovered:29/11/2009
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:90.112 Bytes
MD5 checksum:26d50e9034d5983ae941601207bb50eb
IVDF version:

 General Aliases:
   •  Mcafee: W32/Koobface.worm.gen.r
   •  Panda: W32/Koobface.JE.worm
   •  Eset: Win32/Koobface.NCK
   •  Bitdefender: Worm.Generic.102843

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%\sber18.exe

It deletes the initially executed copy of itself.

It deletes the following files:
   • %malware execution directory%\sd.dat
   • %WINDIR%\dxxdv34567.bat
   • c:\3.reg

The following files are created:

– c:\3.reg This is a non malicious text file with the following content:
   • %code that runs malware%

%malware execution directory%\sd.dat
%WINDIR%\dxxdv34567.bat Furthermore it gets executed after it was fully created. This batch file is used to delete a file.

It tries to download a file:

– The locations are the following:
   • http://themasterengraver.com/**********/?action=%character string%&v=%number%
   • http://juanfurlan.com.ar/**********/?action=%character string%&v=%number%
   • http://vostravauxcleenmain.com/**********/?action=%character string%&v=%number%
   • http://starart.net/**********/?action=%character string%&v=%number%
   • http://www.hombre-fashion.com/**********/?action=%character string%&v=%number%
   • http://www.remodelclarksville.com/**********/?action=%character string%&v=%number%
   • http://www.redcode.rs/**********/?action=%character string%&v=%number%
   • http://panoramapics.com/**********/?action=%character string%&v=%number%
   • http://eurorot.com/**********/?action=%character string%&v=%number%

It tries to executes the following files:

– Filename:
   • %WINDIR%\sber18.exe

– Filename:
   • cmd /c %WINDIR%\dxxdv34567.bat

– Filename:
   • regedit /s c:\2.reg

 Registry The following registry key is added:

– [HKCR\Mime\Database\Content Type\application/xhtml+xml]
   • "CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"
   • "Encoding"=hex:08,00,00,00
   • "Extension"=".xml"

 Miscellaneous  Checks for an internet connection by contacting the following web site:
   • http://www.google.com

 File details Compilation date:

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

Descrizione inserita da Petre Galan su mercoledì 7 aprile 2010
Descrizione aggiornata da Petre Galan su mercoledì 7 aprile 2010

Indietro . . . .