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Win32.HLLW.Autoruner2.5095

Added to the Dr.Web virus database: 2014-02-04

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'a1470a0520cb4654b918159e7b1d3004' = '"%TEMP%\server.exe" ..'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'a1470a0520cb4654b918159e7b1d3004' = '"%TEMP%\server.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '18.exe' = '%APPDATA%Microsoft\System\Services\18.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '18.exe' = '%APPDATA%Microsoft\System\Services\18.exe'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\a1470a0520cb4654b918159e7b1d3004.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\server.exe' = '%TEMP%\server.exe:*:Enabled:server.exe'
Creates and executes the following:
  • '%TEMP%\server.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\server.exe" "server.exe" ENABLE
Modifies file system :
Creates the following files:
  • %TEMP%\server.exe
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\facebook[1]
  • %APPDATA%Microsoft\System\Services\18.exe
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\facebook[1]
Sets the 'hidden' attribute to the following files:
  • %TEMP%\server.exe
  • <Full path to virus>
Deletes the following files:
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\facebook[1]
Network activity:
Connects to:
  • 'localhost':1039
  • 'lo#####992.no-ip.biz':1177
  • 'localhost':1036
  • 'www.fa###ook.com':80
TCP:
HTTP GET requests:
  • www.fa###ook.com/
UDP:
  • DNS ASK lo#####992.no-ip.biz
  • DNS ASK www.fa###ook.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'IEFrame' WindowName: '(null)'
  • ClassName: 'MS_AutodialMonitor' WindowName: '(null)'
  • ClassName: 'MS_WebcheckMonitor' WindowName: '(null)'
  • ClassName: 'Indicator' WindowName: '(null)'
  • ClassName: '' WindowName: '(null)'
  • ClassName: 'Shell_TrayWnd' WindowName: '(null)'