Virus:TR/PSW.Magania.auv
Date discovered:17/02/2009
Type:Trojan
In the wild:Yes
Reported Infections:Medium
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:111.242 Bytes
MD5 checksum:223156e1cd31b4a77a6dac8c43cc5fae
IVDF version:7.01.02.34 - Tuesday, February 17, 2009

 General Method of propagation:
• Autorun feature


Aliases:
   •  Mcafee: Generic PWS.ak trojan
   •  Sophos: Mal/UnkPack-Fam
   •  Panda: W32/Lineage.KMF.worm
   •  Eset: Win32/PSW.OnLineGames.NMY
   •  Bitdefender: Trojan.PWS.OnlineGames.KBUN


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


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

 Files It copies itself to the following location:
   • %drive%\gyn.cmd



It deletes the initially executed copy of itself.



It deletes the following file:
   • %SYSDIR%\drivers\cdaudio.sys



The following files are created:

– %SYSDIR%\olhrwef.exe Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: TR/PSW.Magania.carh.1

– %SYSDIR%\nmdfgds1.dll Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.ZPACK.Gen

– %drive%\yudald.bat Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: TR/PSW.Magania.carh.1

– %SYSDIR%\nmdfgds0.dll Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: TR/PSW.Magania.auw




It tries to download some files:

– The location is the following:
   • http://ghterwa.com/xmfx/**********
Further investigation pointed out that this file is malware, too.

– The location is the following:
   • http://qwdghu.com/xmfx/**********
Further investigation pointed out that this file is malware, too.

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

– [HKLM\SYSTEM\CurrentControlSet\Services\AVPsys]
   • "DisplayName"="AVPsys"
   • "ErrorControl"=dword:0x00000001
   • "ImagePath"="\??\%SYSDIR%\drivers\cdaudio.sys"
   • "Start"=dword:0x00000003
   • "Type"=dword:0x00000001



One of the following values is added in order to run the process after reboot:

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "cdoosoft"="%SYSDIR%\olhrwef.exe"



The following registry key is added:

– [HKLM\SOFTWARE\Classes\CLSID\MADOWN]
   • "urlinfo"="mcjhjk.v"



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 Wednesday, October 28, 2009
Description updated by Petre Galan on Friday, November 13, 2009

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