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Win32.HLLW.Autoruner1.63728

Added to the Dr.Web virus database: 2013-12-21

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'dd3a31b291ed565daefe64e21967be98' = '"%TEMP%\SVHOST.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'dd3a31b291ed565daefe64e21967be98' = '"%TEMP%\SVHOST.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\dd3a31b291ed565daefe64e21967be98.exe
Creates the following files on removable media:
  • <Drive name for removable media>:\dd3a31b291ed565daefe64e21967be98.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\SVHOST.exe' = '%TEMP%\SVHOST.exe:*:Enabled:SVHOST.exe'
Creates and executes the following:
  • '%TEMP%\SVHOST.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\SVHOST.exe" "SVHOST.exe" ENABLE
Modifies file system :
Creates the following files:
  • %TEMP%\SVHOST.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\dd3a31b291ed565daefe64e21967be98.exe
Network activity:
Connects to:
  • 'hh##.dnsd.me':1177
UDP:
  • DNS ASK hh##.dnsd.me
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'