Virus:TR/OnlineGam.120558
Date discovered:03/11/2009
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:120.558 Bytes
MD5 checksum:3644f9863eaf080e9c62c11a49603407
IVDF version:7.01.06.185 - Tuesday, November 3, 2009

 General Method of propagation:
   • Autorun feature


Aliases:
   •  Panda: W32/Lineage.KYR
   •  Eset: Win32/PSW.OnLineGames.NMY
   •  Bitdefender: Trojan.PWS.OnlineGames.KBXL


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%\amvo.exe
   • %drive%\fr.com



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%\kav320.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen

– %SYSDIR%\drivers\klif.sys



It tries to download a file:

– The location is the following:
   • http://fg67i.com/fm4/**********
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]
   • "amva"="%SYSDIR%\amvo.exe"



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 Friday, February 26, 2010
Description updated by Petre Galan on Monday, March 1, 2010

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