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Profil

Win32.HLLW.Autoruner.51960

Added to the Dr.Web virus database: 2011-06-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'AdobeUpdateSheduler' = '%WINDIR%\Driver Cache\i386\sys.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'SunJavaUpdateDlr' = '%WINDIR%\dllhost.exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\8553925.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%WINDIR%\dllhost.exe' = '%WINDIR%\dllhost.exe:*:Enabled:Microsoft Update Sheduler'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<Full path to virus>' = '<Full path to virus>:*:Enabled:Microsoft Update Sheduler'
Creates and executes the following:
  • %WINDIR%\dllhost.exe 
Modifies file system :
Creates the following files:
  • %WINDIR%\repair\dumb.log
  • %WINDIR%\repair\driver.bak
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\boi23[1].swf
  • %WINDIR%\dllhost.exe
  • %WINDIR%\Driver Cache\i386\sys.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\8553925.exe
Network activity:
Connects to:
  • 'www.ag######ariaarcanjo.com.br':80
TCP:
HTTP GET requests:
  • www.ag######ariaarcanjo.com.br/boi23.swf
UDP:
  • DNS ASK www.ag######ariaarcanjo.com.br
Miscellaneous:
Searches for the following windows:
  • ClassName: 'MS_WINHELP' WindowName: ''

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