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Win32.HLLW.Autoruner2.5798

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] 'empty' = '"%TEMP%\wordpad.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'empty' = '"%TEMP%\wordpad.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\empty.exe
Creates the following files on removable media:
  • <Drive name for removable media>:\empty.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\wordpad.exe' = '%TEMP%\wordpad.exe:*:Enabled:wordpad.exe'
Creates and executes the following:
  • '%TEMP%\wordpad.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\wordpad.exe" "wordpad.exe" ENABLE
Modifies file system :
Creates the following files:
  • %TEMP%\wordpad.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\empty.exe
Network activity:
Connects to:
  • 'th####.publicvm.com':1234
UDP:
  • DNS ASK th####.publicvm.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'