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Win32.HLLW.Autoruner2.5839

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

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '70bc6df0bba5c6d6bdfe7306fc449836' = '"%APPDATA%\VcQ12.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '70bc6df0bba5c6d6bdfe7306fc449836' = '"%APPDATA%\VcQ12.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\70bc6df0bba5c6d6bdfe7306fc449836.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\VcQ12.exe' = '%APPDATA%\VcQ12.exe:*:Enabled:VcQ12.exe'
Creates and executes the following:
  • '%APPDATA%\VcQ12.exe'
  • '%WINDIR%\mxu5zomEkjwDkPBgLdVq.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\VcQ12.exe" "VcQ12.exe" ENABLE
Modifies file system :
Creates the following files:
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new
  • %APPDATA%\VcQ12.exe
  • %WINDIR%\mxu5zomEkjwDkPBgLdVq.exe
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new
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:
  • 'bo####ail.no-ip.biz':1177
UDP:
  • DNS ASK bo####ail.no-ip.biz
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'