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Win32.HLLW.Autoruner2.6751

Added to the Dr.Web virus database: 2014-02-11

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '11809f7019c3dcfa89e42e052217c608' = '"%WINDIR%\svchost.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '11809f7019c3dcfa89e42e052217c608' = '"%WINDIR%\svchost.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\11809f7019c3dcfa89e42e052217c608.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%WINDIR%\svchost.exe' = '%WINDIR%\svchost.exe:*:Enabled:svchost.exe'
Creates and executes the following:
  • '%WINDIR%\svchost.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%WINDIR%\svchost.exe" "svchost.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
  • %WINDIR%\svchost.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:
  • 'ha#####k15.no-ip.org':5552
UDP:
  • DNS ASK ha#####k15.no-ip.org
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'