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Win32.HLLW.Autoruner2.16172

Added to the Dr.Web virus database: 2014-07-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '1b365dbfed7401aa292e71f8e48e870a' = '"%APPDATA%\winlogon.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '1b365dbfed7401aa292e71f8e48e870a' = '"%APPDATA%\winlogon.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\1b365dbfed7401aa292e71f8e48e870a.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\winlogon.exe' = '%APPDATA%\winlogon.exe:*:Enabled:winlogon.exe'
Creates and executes the following:
  • '%APPDATA%\winlogon.exe'
  • '%TEMP%\Server.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\winlogon.exe" "winlogon.exe" ENABLE
Modifies file system :
Creates the following files:
  • %APPDATA%\winlogon.exe
  • %TEMP%\HVMRuntm.dll
  • %TEMP%\Server.exe
Network activity:
Connects to:
  • 'nj#####iller.zapto.org':5552
UDP:
  • DNS ASK nj#####iller.zapto.org
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'
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