Need help? Ask the community or hire an expert.
Go to Avira Answers
Virus:WORM/Autorun.bggd
Date discovered:22/07/2010
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:128.000 Bytes
MD5 checksum:78C8EE946A59CA41EB317A8F2890083E
IVDF version:7.10.09.161 - Thursday, July 22, 2010

 General Method of propagation:
   • Autorun feature


Aliases:
   •  Symantec: W32.Gammima.AG
   •  Mcafee: W32/Autorun.worm.c
   •  Kaspersky: Worm.Win32.AutoRun.bggd
   •  TrendMicro: WORM_TATERF.TXS
   •  F-Secure: Trojan.Onlinegames.1072
   •  Bitdefender: Trojan.Onlinegames.1072
   •  Microsoft: Worm:Win32/Taterf.DM
   •  Panda: W32/Autorun.JOF
   •  Eset: Win32/PSW.OnLineGames.OVL
   •  GData: Trojan.Onlinegames.1072
   •  DrWeb: Trojan.PWS.Wsgame.12661


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


Side effects:
   • Downloads files
   • Drops malicious files

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



It deletes the initially executed copy of itself.



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



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 Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: TR/PSW.Magania.dcxp

%TEMPDIR%\am.exe Further investigation pointed out that this file is malware, too.



It tries to download some files:

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

– The location is the following:
   • http://www.163dji.com/1mg/****
It is saved on the local hard drive under: %TEMPDIR%\am.rar

 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"



The following registry keys are added:

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

– [HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache]
   • "%malware execution directory%\%executed file%.exe"="%executed file%"



The following registry keys are changed:

Various Explorer settings:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
   Folder\Hidden\SHOWALL]
   Old value:
   • "CheckedValue"=dword:00000001
   New value:
   • "CheckedValue"=dword:00000000

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\]
   Old value:
   • "Hidden"=dword:00000001
   • "ShowSuperHidden"=dword:00000001
   New value:
   • "Hidden"=dword:00000002
   • "ShowSuperHidden"=dword:00000000

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

    Process name:
   • Explorer.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

Description inserted by Irina Diaconescu on Wednesday, November 3, 2010
Description updated by Andrei Ivanes on Tuesday, November 9, 2010

Back . . . .