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Virus:WORM/Autorun.bhgk
Date discovered:14/05/2010
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:111.104 Bytes
MD5 checksum:283aab2e0F5ced7bce87e7783f69205e
VDF version:7.10.03.24
IVDF version:7.10.07.110 - Friday, May 14, 2010

 General Method of propagation:
   • Autorun feature


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


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

 Files It copies itself to the following locations:
   • %TEMPDIR%\nodqq.exe
   • %drive%\9rfpp.exe
   • %drive%\xexh.exe



It deletes the initially executed copy of itself.



It deletes the following files:
   • %TEMPDIR%\am1.rar
   • %TEMPDIR%\am.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%\nodqq0.dll Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: TR/Magania.daxl

%TEMPDIR%\dsoqq.exe
%TEMPDIR%\dsoqq0.dll



It tries to download a file:

– The location is the following:
   • www.goo**********.com/1mg/am1.rar
It is saved on the local hard drive under: %temporary internet files%\Content.IE5\YGRGUTKK\am[1].rar Furthermore this file gets executed after it was fully downloaded.



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]
   • "ctfmon.exe"="%SYSDIR%\ctfmon.exe"
   • "nod32"="%TEMPDIR%\nodqq.exe"
   • "dso32"="%TEMPDIR%\dsoqq.exe"

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



The following registry keys are changed:

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

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

 Injection – It injects itself as a thread into a process.

    Process name:
   • iexplore.exe



–  It injects the following file into a process: %TEMPDIR%\dsoqq0.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 packers:
   • UPX
   • ASPack

Описание добавил Ana Maria Niculescu в(о) вторник, 6 июля 2010 г.
Описание обновил Ana Maria Niculescu в(о) среда, 7 июля 2010 г.

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