Virus:TR/Inject.GGZ
Date discovered:10/09/2008
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:135.168 Bytes
MD5 checksum:63ba7bf986e0935b3debc332d6a4b7ac
IVDF version:7.00.06.139 - Wednesday, September 10, 2008

 General Method of propagation:
   • Autorun feature


Aliases:
   •  Mcafee: W32/Bindo.worm virus
   •  Sophos: Mal/Generic-A
   •  Bitdefender: Win32.Worm.Malas.B
   •  Panda: W32/Nahkos.A
   •  Eset: Win32/Malas.B


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


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

 Files It copies itself to the following locations:
   • %drive%\autoply.exe
   • %PROGRAM FILES%\Common Files\Microsoft Shared\MSshare.exe
   • %HOME%\userinit.exe
   • %WINDIR%\Web\OfficeUpdate.exe
   • %TEMPDIR%\svchost.exe



The following files are created:

– %ALLUSERSPROFILE%\Start Menu\Programs\Startup\Office Update.lnk This is a non malicious text file with the following content:
   • %code that runs malware%

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




It tries to executes the following files:

– Filename:
   • "%TEMPDIR%\svchost.exe"


– Filename:
   • "%SYSDIR%\AT.exe" /delete /yes


– Filename:
   • "%SYSDIR%\AT.exe" 20:30 /every:M,T,W,TH,F,S,SU %WINDIR%\Web\OfficeUpdate.exe


– Filename:
   • "%SYSDIR%\AT.exe" 11:30 /every:M,T,W,TH,F,S,SU %WINDIR%\Web\OfficeUpdate.exe

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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "SoundMax"="%HOME%\userinit.exe"



The values of the following registry keys are removed:

–  [HKLM\SOFTWARE\Classes\lnkfile]
   • IsShortCut

–  [HKLM\SOFTWARE\Classes\InternetShortcut]
   • IsShortCut

–  [HKLM\SOFTWARE\Classes\piffile]
   • IsShortCut



The following registry keys are added:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer]
   • "Nofolderoptions"=dword:0x00000001

– [HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore]
   • "DisableConfig"=dword:0x00000001
   • "DisableSR"=dword:0x00000001

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
   • "Nofolderoptions"=dword:0x00000001



The following registry key is changed:

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

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

Description inserted by Petre Galan on Wednesday, July 28, 2010
Description updated by Petre Galan on Wednesday, July 28, 2010

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