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Virus:TR/OnLineGame.90816
Date discovered:31/03/2010
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:90.816 Bytes
MD5 checksum:a50E0A34cbbd175209338cce426413b2
VDF version:7.10.02.106
IVDF version:7.10.06.06 - Wednesday, March 31, 2010

 General Methods of propagation:
   • Autorun feature
   • Mapped network drives


Aliases:
   •  Kaspersky: Worm.Win32.AutoRun.lnv
   •  TrendMicro: TSPY_LINEAGE.AKK
   •  F-Secure: Trojan.PWS.OnlineGames.ZNM
   •  Bitdefender: Trojan.PWS.OnlineGames.ZNM
   •  Microsoft: Worm:Win32/Taterf.B
   •  AVG: PSW.OnlineGames_r.G
   •  PCTools: Trojan.Autorun!ct
   •  Eset: Win32/PSW.OnLineGames.NMY
   •  GData: Trojan.PWS.OnlineGames.ZNM
   •  Authentium: W32/Worm.AJRH
   •  Norman: AutoRun.FBA
   •  Rising: Trojan.Win32.Vaklik.sh


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows Server 2008
   • Windows 7


Side effects:
   • Drops malicious files
   • Registry modification
   • Steals information

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



The following files are created:

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

%SYSDIR%\ckvo0.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Agent.b.22

%SYSDIR%\drivers\klif.sys Further investigation pointed out that this file is malware, too. Detected as: TR/Onlinegames.sxsw




It tries to download a file:

– The location is the following:
   • http://www.qw**********1.rar

 Registry The following registry key 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\SOFTWARE\Classes\CLSID\MADOWN]
   • "urlinfo"=%gathered from the internet%



The following registry keys are changed:

Various Explorer settings:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
   Folder\Hidden\SHOWALL]
   New value:
   • "CheckedValue"=dword:00000000

Various Explorer settings:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   New value:
   • "Hidden"=dword:00000002
   • "ShowSuperHidden"=dword:00000000

 Injection –  It injects the following file into a process: %SYSDIR%\ckvo0.dll

    Process name:
   • explorer.exe


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

Description inserted by Alexandru Dinu on Thursday, March 10, 2011
Description updated by Alexandru Dinu on Thursday, March 10, 2011

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