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Win32.HLLW.Autoruner1.63791

Added to the Dr.Web virus database: 2013-12-21

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'e798849d52187c62981d8e8ef89c0078' = '"%ALLUSERSPROFILE%\system32.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'e798849d52187c62981d8e8ef89c0078' = '"%ALLUSERSPROFILE%\system32.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\e798849d52187c62981d8e8ef89c0078.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%ALLUSERSPROFILE%\system32.exe' = '%ALLUSERSPROFILE%\system32.exe:*:Enabled:system32.exe'
Creates and executes the following:
  • '%ALLUSERSPROFILE%\system32.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%ALLUSERSPROFILE%\system32.exe" "system32.exe" ENABLE
Modifies file system :
Creates the following files:
  • %ALLUSERSPROFILE%\system32.exe
Network activity:
UDP:
  • DNS ASK ku#####lar11.zapto.org
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'