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Win32.HLLW.Autoruner.58733

Added to the Dr.Web virus database: 2011-09-13

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'Policies' = '%WINDIR%\Media\update.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'Policies' = '%WINDIR%\Media\update.exe'
  • [<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'HKLM' = '%WINDIR%\Media\update.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'HKCU' = '%WINDIR%\Media\update.exe'
  • [<HKLM>\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{6HTVXM0P-E2CR-8778-8AOD-L34051IJ6W1E}] 'StubPath' = '%WINDIR%\Media\update.exe Restart'
  • [<HKLM>\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{6HTVXM0P-E2CR-8778-8AOD-L34051IJ6W1E}] 'StubPath' = '%WINDIR%\Media\update.exe'
Malicious functions
Injects code into
the following system processes:
  • %WINDIR%\syswow64\explorer.exe
Modifies file system
Creates the following files
  • %WINDIR%\media\update.exe
  • %TEMP%\xx--xx--xx.txt
  • %APPDATA%\logs.dat
  • %TEMP%\xxx.xxx
  • %TEMP%\uuu.uuu
Sets the 'hidden' attribute to the following files
  • %WINDIR%\media\update.exe
  • %APPDATA%\logs.dat
Deletes the following files
  • %TEMP%\xx--xx--xx.txt
  • %TEMP%\uuu.uuu
  • %TEMP%\xxx.xxx
Substitutes the following files
  • %TEMP%\uuu.uuu
  • %TEMP%\xxx.xxx
Network activity
UDP
  • DNS ASK di####ng.zapto.org
Miscellaneous
Creates and executes the following
  • '%WINDIR%\media\update.exe'
Executes the following
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe'
  • '%WINDIR%\syswow64\explorer.exe'

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