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Win32.HLLW.Autoruner1.64465

Added to the Dr.Web virus database: 2013-12-24

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'aa086a119c63c7a646b5255a45cbded4' = '"%HOMEPATH%\system.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'aa086a119c63c7a646b5255a45cbded4' = '"%HOMEPATH%\system.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\aa086a119c63c7a646b5255a45cbded4.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%HOMEPATH%\system.exe' = '%HOMEPATH%\system.exe:*:Enabled:system.exe'
Creates and executes the following:
  • '%HOMEPATH%\system.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%HOMEPATH%\system.exe" "system.exe" ENABLE
Modifies file system :
Creates the following files:
  • %HOMEPATH%\system.exe
Network activity:
Connects to:
  • 'ws###.no-ip.biz':5552
UDP:
  • DNS ASK ws###.no-ip.biz
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: '(null)'
  • ClassName: 'Indicator' WindowName: '(null)'