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Win32.HLLW.Autoruner1.24991

Added to the Dr.Web virus database: 2012-08-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Microsoft(R) RNSVC Driver' = '%HOMEPATH%\Microsoft-Driver-1-82-9475-9627-8645\winsrvn.exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\wincdrn32.exe
  • <Drive name for removable media>:\autorun.inf
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%HOMEPATH%\Microsoft-Driver-1-82-9475-9627-8645\winsrvn.exe' = '%HOMEPATH%\Microsoft-Driver-1-82-9475-9627-8645\winsrvn.exe:*:Enabled:Microsoft(R) RNSVC Driver'
Creates and executes the following:
  • %HOMEPATH%\Microsoft-Driver-1-82-9475-9627-8645\winsrvn.exe
Modifies file system :
Creates the following files:
  • %HOMEPATH%\Microsoft-Driver-1-82-9475-9627-8645\winsrvn.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\wincdrn32.exe
  • %HOMEPATH%\Microsoft-Driver-1-82-9475-9627-8645\winsrvn.exe
Network activity:
Connects to:
  • 'ir####.dd0s.info':6662
UDP:
  • DNS ASK ir####.dd0s.info
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: ''