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Date discovered:12/01/2010
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:57.344 Bytes
MD5 checksum:79ba29c855c1d0a2f16f7760cb7a3ad2
IVDF version:

 General Aliases:
   •  Mcafee: W32/Koobface.worm.gen.o
   •  Panda: W32/Koobface.FQ.worm
   •  Eset: Win32/Koobface.NCF
   •  Bitdefender: Trojan.Generic.2583495

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

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

 Files It copies itself to the following location:
   • %WINDIR%\freddy70.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:

%malware execution directory%\sd.dat
– C:\3.reg This is a non malicious text file with the following content:
   • %code that runs malware%

%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 some files:

– The locations are the following:
   • http://orangery.nezhin.com/**********/?action=fbgen&v=70
   • http://crescenthorizons.com/**********/?action=fbgen&v=70
   • http://momentsbypat.com/**********/?action=fbgen&v=70
   • http://tehnocentr.chita.ru/**********/?action=fbgen&v=70
   • http://gvpschekschov.iv-edu.ru/**********/?action=fbgen&v=70
   • http://uitgehuild.nl/**********/?action=fbgen&v=70
   • http://www.magnaniwines.com/**********/?action=fbgen&v=70
   • http://kalender.sttmedia.se/**********/?action=fbgen&v=70
   • http://genesiskdmparts.com/**********/?action=fbgen&v=70
   • http://agribasal-me.com/**********/?action=fbgen&a=544453496&v=70&ie=6.0.2800.1106
   • http://agribasal-me.com/**********/?action=fbgen&v=70
   • http://jgreininghorses.com/**********/?action=fbgen&v=70
   • http://chrislobue.com/**********/?action=fbgen&v=70
   • http://mcleanlocksmith.com/**********/?action=fbgen&v=70
   • http://qualityrecords.com.au/**********/?action=fbgen&v=70
   • http://fredericia-stavgang.dk/**********/?action=fbgen&v=70
   • http://web.reg.md/**********/?action=fbgen&v=70
   • http://zu.ktk.ru/**********/?action=fbgen&v=70
   • http://cubman32.net.ua/**********/?action=fbgen&v=70
   • http://billig-bauer.de/**********/?action=fbgen&v=70
   • http://cmpmiami.com/**********/?action=fbgen&v=70
   • http://videoleverage.com/**********/?action=fbgen&v=70
   • http://www.Germanamericantax.com/**********/?action=fbgen&v=70
At the time of writing this file was not online for further investigation.

 Registry The values of the following registry key are removed:

–  [HKEY_USERS\S-1-5-21-2025429265-1425521274-839522115-1003\Software\
   Microsoft\Windows\CurrentVersion\Internet Settings]
   • AutoConfigURL
   • ProxyOverride
   • ProxyServer

The following registry keys are changed:

– [HKEY_USERS\S-1-5-21-2025429265-1425521274-839522115-1003\Software\
   Microsoft\Windows\CurrentVersion\Internet Settings]
   New value:
   • "MigrateProxy"=dword:0x00000001
   • "ProxyEnable"=dword:0x00000000

– [HKLM\SYSTEM\ControlSet001\Hardware Profiles\0001\Software\
   Microsoft\windows\CurrentVersion\Internet Settings]
   New value:
   • "ProxyEnable"=dword:0x00000000

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

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

Descripción insertada por Petre Galan el martes, 23 de febrero de 2010
Descripción actualizada por Petre Galan el martes, 23 de febrero de 2010

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