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Profil

Win32.HLLW.Autoruner2.5065

Added to the Dr.Web virus database: 2014-02-04

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'afd21bc254497092c1c4591d4470c48e' = '"%TEMP%\skype.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'afd21bc254497092c1c4591d4470c48e' = '"%TEMP%\skype.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\afd21bc254497092c1c4591d4470c48e.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\skype.exe' = '%TEMP%\skype.exe:*:Enabled:skype.exe'
Creates and executes the following:
  • '%TEMP%\skype.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\skype.exe" "skype.exe" ENABLE
Modifies file system :
Creates the following files:
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new
  • %TEMP%\skype.exe
Moves the following files:
  • from %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new to %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch
  • from %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new to %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch
Network activity:
Connects to:
  • 'localhost':1177
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'