Need help? Ask the community or hire an expert.
Go to Avira Answers
Virus:Worm/Koobface.aec
Date discovered:19/06/2009
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:81.920 Bytes
MD5 checksum:d5833861893cd5ba15efd88bb91d1d8e
IVDF version:7.01.04.114 - Friday, June 19, 2009

 General Aliases:
   •  Sophos: Mal/Koobface-E
   •  Bitdefender: Trojan.Generic.4061407
   •  Panda: Adware/TotalPCDefender2010
   •  Eset: Win32/Koobface.NCX


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:
   • %drive%\windows\bill110.exe



It overwrites a file.
%WINDIR%\bill110.exe



It deletes the initially executed copy of itself.



The following file is created:

%WINDIR%\dxxdv34567.bat



It tries to download some files:

The locations are the following:
   • http://store.retrobutiken.se/**********/?action=%character string%&v=%number%&crc=%number%
   • http://store.retrobutiken.se/**********/?action=%character string%&a=%character string%&v=%number%&c_fb=%number%&ie=%character string%


The location is the following:
   • http://welovetweet.com/**********/?getexe=%character string%




It tries to executes the following files:

Filename:
   • %WINDIR%\bill110.exe


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

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "sysfbtray"="%WINDIR%\bill110.exe"



The following registry key is added:

[HKCU\Software\Microsoft\Internet Explorer\Main]
   • "tp"="1000"

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

Description inserted by Petre Galan on Monday, August 9, 2010
Description updated by Petre Galan on Monday, August 9, 2010

Back . . . .