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Win32.HLLW.Autoruner2.17012

Added to the Dr.Web virus database: 2014-08-22

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '8e99f3b1e3f95f7430ecbbaab1db947e' = '"%TEMP%\systeam.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '8e99f3b1e3f95f7430ecbbaab1db947e' = '"%TEMP%\systeam.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '5475' = '<LS_APPDATA>\jamel.exe'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\8e99f3b1e3f95f7430ecbbaab1db947e.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\systeam.exe' = '%TEMP%\systeam.exe:*:Enabled:systeam.exe'
Creates and executes the following:
  • '%TEMP%\systeam.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\systeam.exe" "systeam.exe" ENABLE
Modifies file system :
Creates the following files:
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new
  • <LS_APPDATA>\jamel.exe
  • %TEMP%\systeam.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:
  • 'bl####996.no-ip.biz':1177
UDP:
  • DNS ASK bl####996.no-ip.biz
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: ''