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Win32.HLLW.Autoruner1.63663

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] '869924a05373fe47bc7f7a40af77366f' = '"%TEMP%\wn32.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '869924a05373fe47bc7f7a40af77366f' = '"%TEMP%\wn32.exe" ..'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\wn32.exe' = '%TEMP%\wn32.exe:*:Enabled:wn32.exe'
Creates and executes the following:
  • '%TEMP%\wn32.exe'
  • '%TEMP%\159.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\wn32.exe" "wn32.exe" ENABLE
Modifies file system :
Creates the following files:
  • %TEMP%\wn32.exe
  • %TEMP%\159.exe
Network activity:
Connects to:
  • 'wn##.#erveftp.com':81
UDP:
  • DNS ASK wn##.#erveftp.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'