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Win32.HLLW.Autoruner.48507

Added to the Dr.Web virus database: 2011-04-29

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '<File name>.exe' = '<Full path to file>'
Creates or modifies the following files
  • %APPDATA%\microsoft\windows\start menu\programs\startup\vjqugr.exe
Creates the following files on removable media
  • <Drive name for removable media>:\vjqugr.exe
  • <Drive name for removable media>:\autorun.inf
Malicious functions
Injects code into
the following system processes:
  • %WINDIR%\syswow64\explorer.exe
Terminates or attempts to terminate
the following system processes:
  • <SYSTEM32>\svchost.exe
  • <SYSTEM32>\wudfhost.exe
Modifies file system
Creates the following files
  • %APPDATA%\svchost.exe
  • %TEMP%\gerarqlb.0.cs
  • %TEMP%\gerarqlb.cmdline
  • %TEMP%\gerarqlb.out
  • %TEMP%\csce3fe.tmp
  • %TEMP%\rese40e.tmp
  • %TEMP%\gerarqlb.dll
  • %WINDIR%\syswow64\install\winsysx
  • %TEMP%\user2.txt
  • %APPDATA%\userlog.dat
  • %TEMP%\user7
  • %TEMP%\user8
Sets the 'hidden' attribute to the following files
  • <Drive name for removable media>:\vjqugr.exe
  • <Drive name for removable media>:\autorun.inf
  • %WINDIR%\syswow64\install\winsysx
  • %APPDATA%\userlog.dat
Deletes the following files
  • %TEMP%\rese40e.tmp
  • %TEMP%\csce3fe.tmp
  • %TEMP%\gerarqlb.out
  • %TEMP%\gerarqlb.0.cs
  • %TEMP%\gerarqlb.cmdline
  • %TEMP%\gerarqlb.dll
  • %TEMP%\user2.txt
  • %TEMP%\user8
  • %TEMP%\user7
Substitutes the following files
  • %TEMP%\user8
  • %TEMP%\user7
Network activity
Connects to
  • 'localhost':49168
Miscellaneous
Searches for the following windows
  • ClassName: '' WindowName: 'View Available Networks'
Creates and executes the following
  • '%APPDATA%\svchost.exe'
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESE40E.tmp" "%TEMP%\CSCE3FE.tmp"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\csc.exe' /noconfig /fullpaths @"%TEMP%\gerarqlb.cmdline"' (with hidden window)
Executes the following
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\csc.exe' /noconfig /fullpaths @"%TEMP%\gerarqlb.cmdline"
  • '<SYSTEM32>\svchost.exe' -k LocalService
  • '<SYSTEM32>\svchost.exe' -k DcomLaunch
  • '<SYSTEM32>\svchost.exe' -k RPCSS
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESE40E.tmp" "%TEMP%\CSCE3FE.tmp"
  • '<SYSTEM32>\svchost.exe' -k LocalServiceNetworkRestricted
  • '%WINDIR%\syswow64\explorer.exe'

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