Virus:TR/OnlineGam.187539
Date discovered:03/11/2009
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:187.539 Bytes
MD5 checksum:2e5eff01b2dcdcf2dda3b66d0d124cb4
IVDF version:7.01.06.185 - Tuesday, November 3, 2009

 General Method of propagation:
   • Autorun feature


Aliases:
   •  Panda: W32/Lineage.KTI
   •  Eset: Win32/PSW.OnLineGames.NNU
   •  Bitdefender: Trojan.Generic.1269521


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:
   • %drive%\pei.cmd
   • %SYSDIR%\kvosoft.exe



It deletes the initially executed copy of itself.



It deletes the following file:
   • %SYSDIR%\drivers\klif.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%\dsetwem0.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.ZPACK.Gen

– %SYSDIR%\hgkjghg0.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Vundo

– %SYSDIR%\drivers\klif.sys Detected as: Rkit/Agent.NM




It tries to download a file:

– The location is the following:
   • http://frt7k.com/xhg2/**********
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]
   • "kvasoft"="%SYSDIR%\kvosoft.exe"



The following registry key including all values and subkeys is removed:
   • [HKLM\System\CurrentControlSet\Services\KAVsys]



The following registry keys are added:

– [HKLM\SOFTWARE\Classes\TypeLib\
   {CE7C3CE2-4B15-11D1-ABED-709549C10000}\1.0\FLAGS]
   • "@"="0"

– [HKLM\SOFTWARE\Classes\IEHlprObj.IEHlprObj\CurVer]
   • "@"="IEHlprObj.IEHlprObj.1"

– [HKLM\SOFTWARE\Classes\CLSID\
   {CE7C3CF0-4B15-11D1-ABED-709549C10000}]
   • "@"="IEHlprObj Class"

– [HKLM\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1]
   • "@"="IEHlprObj Class"

– [HKLM\SOFTWARE\Classes\Interface\
   {CE7C3CEF-4B15-11D1-ABED-709549C10000}]
   • "@"="IIEHlprObj"

– [HKLM\SOFTWARE\Classes\Interface\
   {CE7C3CEF-4B15-11D1-ABED-709549C10000}\ProxyStubClsid32]
   • "@"="{00020424-0000-0000-C000-000000000046}"

– [HKLM\SOFTWARE\Classes\TypeLib\
   {CE7C3CE2-4B15-11D1-ABED-709549C10000}\1.0\0\win32]
   • "@"="%SYSDIR%\hgkjghg0.dll"

– [HKLM\SOFTWARE\Classes\CLSID\{CE7C3CF0-4B15-11D1-ABED-709549C10000}\
   ProgID]
   • "@"="IEHlprObj.IEHlprObj.1"

– [HKLM\SOFTWARE\Classes\IEHlprObj.IEHlprObj]
   • "@"="IEHlprObj Class"

– [HKLM\SOFTWARE\Classes\Interface\
   {CE7C3CEF-4B15-11D1-ABED-709549C10000}\ProxyStubClsid]
   • "@"="{00020424-0000-0000-C000-000000000046}"

– [HKLM\SOFTWARE\Classes\Interface\
   {CE7C3CEF-4B15-11D1-ABED-709549C10000}\TypeLib]
   • "@"="{CE7C3CE2-4B15-11D1-ABED-709549C10000}"
   • "Version"="1.0"

– [HKLM\SOFTWARE\Classes\TypeLib\
   {CE7C3CE2-4B15-11D1-ABED-709549C10000}\1.0\HELPDIR]
   • "@"="%SYSDIR%\"

– [HKLM\SOFTWARE\Classes\CLSID\{CE7C3CF0-4B15-11D1-ABED-709549C10000}\
   InprocServer32]
   • "@"="%SYSDIR%\hgkjghg0.dll"
   • "ThreadingModel"="Apartment"

– [HKLM\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1\CLSID]
   • "@"="{CE7C3CF0-4B15-11D1-ABED-709549C10000}"

– [HKLM\SOFTWARE\Classes\TypeLib\
   {CE7C3CE2-4B15-11D1-ABED-709549C10000}\1.0]
   • "@"="IEHelper 1.0 Type Library"

– [HKLM\SOFTWARE\Classes\CLSID\{CE7C3CF0-4B15-11D1-ABED-709549C10000}\
   VersionIndependentProgID]
   • "@"="IEHlprObj.IEHlprObj"

– [HKLM\System\CurrentControlSet\Services\KAVsys]
   • "ErrorControl"=dword:0x00000001
   • "ImagePath"="\??\%SYSDIR%\drivers\klif.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 Tuesday, March 2, 2010
Description updated by Petre Galan on Wednesday, March 3, 2010

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