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Virus:TR/PSW.OnlineGames.WSNG
Date discovered:12/05/2010
Type:Trojan
Subtype:PSW
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:112.128 Bytes
MD5 checksum:39c05e6fa90Bef9c94ccdbd10A2a6120
VDF version:7.10.07.96

 General Method of propagation:
    Autorun feature


Aliases:
   •  Symantec: W32.Gammima.AG
   •  Mcafee: PWS-Gamania.gen.a
   •  Kaspersky: Worm.Win32.AutoRun.bhep
   •  TrendMicro: WORM_AUTORUN.FJK
   •  F-Secure: Trojan-PSW:W32/OnlineGames.UAG
   •  Sophos: W32/AutoRun-BCX
   •  Panda: W32/Lineage.LLR
   •  VirusBuster: Worm.AutoRun.APDD
   •  Eset: Win32/PSW.OnLineGames.OUM
   •  Bitdefender: Trojan.PWS.Onlinegames.KDHO


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


Side effects:
   • Downloads malicious files
   • Drops malicious files
   • Lowers security settings
   • Registry modification
   • Steals information

 Files It copies itself to the following locations:
   • %TEMPDIR%\nodqq.exe
   • %drive%\12gn6id2.exe



It deletes the initially executed copy of itself.



It deletes the following files:
   • %TEMPDIR%\am1.rar
   • %TEMPDIR%\am.exe
   • %TEMPDIR%\nodqq0.dll



The following files are created:

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

%TEMPDIR%\nodqq0.dll Further investigation pointed out that this file is malware, too. Detected as: TR/PSW.Magania.dfpt

%TEMPDIR%\am.exe
%TEMPDIR%\dsoqq.exe
%TEMPDIR%\dsoqq0.dll
%TEMPDIR%\am1.rar
%drive%\x3xh.exe



It tries to download some files:

The location is the following:
   • http://www.googlertf.com/1m**********
It is saved on the local hard drive under: %TEMPDIR%\am1.rar

The location is the following:
   • http://www.googlertf.com/1m**********
It is saved on the local hard drive under: %TEMPDIR%\am.exe



It tries to executes the following file:

Filename:
   • %TEMPDIR%\am.exe

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "nod32"="%TEMPDIR%\nodqq.exe"
   • "dso32"="%TEMPDIR%\dsoqq.exe"



The following registry key is added:

[HKLM\SOFTWARE\Classes\CLSID\MADOWN]
   • "urlinfo"="%character string%"



The following registry keys are changed:

Various Explorer settings:

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
   New value:
   • "NoDriveTypeAutoRun"=dword:0x00000091

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
   Folder\Hidden\SHOWALL]
   New value:
   • "CheckedValue"=dword:0x00000000

 Injection –  It injects the following file into a process: %TEMPDIR%\nodqq0.dll

    Process name:
   • explorer.exe



–  It injects the following file into a process: %TEMPDIR%\dsoqq0.dll

    Process name:
   • explorer.exe



It injects itself as a remote thread into a process.

    Process name:
   • iexplore.exe


 File details Programming language:
The malware program was written in MS Visual C++.


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

Descripción insertada por Alexandru Dinu el martes 6 de julio de 2010
Descripción actualizada por Alexandru Dinu el martes 6 de julio de 2010

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