Virus:TR/OnlineGam.116564
Date discovered:09/12/2008
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:116.564 Bytes
MD5 checksum:9eda80b799b87867c6601224dc550d7e
IVDF version:7.01.00.208 - Tuesday, December 9, 2008

 General Method of propagation:
   • Autorun feature


Aliases:
   •  Sophos: Mal/EncPk-CE
   •  Panda: W32/Lineage.JAW
   •  Eset: Win32/PSW.OnLineGames.NMY
   •  Bitdefender: Trojan.Generic.2203674


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


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

 Files It copies itself to the following locations:
   • %SYSDIR%\ckvo.exe
   • %drive%\hgu.bat



It overwrites a file.
– %SYSDIR%\drivers\vga.sys



The following files are created:

– %drive%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

– %SYSDIR%\ckvo0.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Vundo.Gen

– %TEMPDIR%\xl4wtg77.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.ZPACK.Gen




It tries to download a file:

– The location is the following:
   • http://www.mgmicrosoft.com/xmfx/**********
At the time of writing this file was not online for further investigation.

 Registry One of the following values is added in order to run the process after reboot:

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "kamsoft"="%SYSDIR%\ckvo.exe"



The following registry key is added:

– [HKLM\SYSTEM\ControlSet001\Services\KAVsys]
   • "ErrorControl"=dword:0x00000001
   • "ImagePath"="\??\%SYSDIR%\drivers\vga.sys"
   • "Start"=dword:0x00000001
   • "Type"=dword:0x00000001



The following registry keys are changed:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   New value:
   • "Hidden"=dword:0x00000002
   • "ShowSuperHidden"=dword:0x00000000

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
   Folder\Hidden\SHOWALL]
   New value:
   • "CheckedValue"=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 Wednesday, February 17, 2010
Description updated by Petre Galan on Wednesday, February 17, 2010

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