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Win32.HLLW.Autoruner2.5958

Added to the Dr.Web virus database: 2014-02-07

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '965fbda807f8477da3a3de71a8e4cd61' = '"%TEMP%\svhot.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '965fbda807f8477da3a3de71a8e4cd61' = '"%TEMP%\svhot.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\965fbda807f8477da3a3de71a8e4cd61.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\svhot.exe' = '%TEMP%\svhot.exe:*:Enabled:svhot.exe'
Creates and executes the following:
  • '%TEMP%\svhot.exe'
  • '%TEMP%\280.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\svhot.exe" "svhot.exe" ENABLE
Modifies file system :
Creates the following files:
  • %TEMP%\svhot.exe
  • %TEMP%\280.exe
Network activity:
Connects to:
  • 'na####3.zapto.org':1177
UDP:
  • DNS ASK na####3.zapto.org
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'