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Win32.HLLW.Silka.91

Added to the Dr.Web virus database: 2011-12-06

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows Firewall' = '%TEMP%\lsass.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows Firewall' = '%TEMP%\lsass.exe'
Malicious functions:
Creates and executes the following:
  • %TEMP%\lsass.exe 
Modifies file system :
Creates the following files:
  • %TEMP%\lsass.exe
Sets the 'hidden' attribute to the following files:
  • %TEMP%\lsass.exe
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: ''