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Virus:TR/PSW.OnlineGam.bbe
Date discovered:11/12/2009
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:114.191 Bytes
MD5 checksum:3acebd250789ad7ad0a3ec080186e6a3
IVDF version:7.10.01.213 - Friday, December 11, 2009

 General Method of propagation:
• Autorun feature


Aliases:
   •  Panda: W32/Autorun.JJT
   •  Eset: Win32/PSW.OnLineGames.NNU
   •  Bitdefender: Trojan.PWS.OnlineGames.KCZV


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:
   • %TEMPDIR%\herss.exe
   • %drive%\b00ijwpu.exe



The following files are created:

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

%TEMPDIR%\cvasds0.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.googlei9p.com/1mg/**********
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]
   • "cdoosoft"="%TEMPDIR%\herss.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 Monday, February 8, 2010
Description updated by Petre Galan on Monday, February 8, 2010

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