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Profil

Win32.HLLW.Autoruner2.3762

Added to the Dr.Web virus database: 2014-01-30

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '19e2c3ef50a7ba51b73834560b3fcce9' = '"%TEMP%\wejz.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '19e2c3ef50a7ba51b73834560b3fcce9' = '"%TEMP%\wejz.exe" ..'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\wejz.exe' = '%TEMP%\wejz.exe:*:Enabled:wejz.exe'
Creates and executes the following:
  • '%TEMP%\wejz.exe'
  • '%TEMP%\Y9cA8bTK55jM6Vs2u1ah.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\wejz.exe" "wejz.exe" ENABLE
Modifies file system :
Creates the following files:
  • %TEMP%\wejz.exe
  • %APPDATA%\Microsoft\CLR Security Config\v2.0.50727.42\security.config.cch.new
  • %TEMP%\Y9cA8bTK55jM6Vs2u1ah.exe
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new
Deletes the following files:
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.2916.171359
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.2916.171343
Moves the following files:
  • from %APPDATA%\Microsoft\CLR Security Config\v2.0.50727.42\security.config.cch.new to %APPDATA%\Microsoft\CLR Security Config\v2.0.50727.42\security.config.cch
  • from %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch to %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.2916.171359
  • from %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch to %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.2916.171343
  • 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
  • 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
Network activity:
Connects to:
  • 'pc###.no-ip.org':6369
UDP:
  • DNS ASK pc###.no-ip.org
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'