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Win32.HLLW.Autoruner.55323

Added to the Dr.Web virus database: 2011-07-30

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Terminal Server\Install\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows' = 'winlogin.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows' = 'winlogin.exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\driver\usb\usb_driver.exe
  • <Drive name for removable media>:\driver\usb\Desktop.ini
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<Full path to virus>' = '<Full path to virus>:*:Enabled:Windows'
Creates and executes the following:
  • %WINDIR%\winlogin.exe 
Searches for windows to
detect programs and games:
  • ClassName: 'MSNHiddenWindowClass' WindowName: ''
Modifies file system :
Creates the following files:
  • %WINDIR%\winlogin.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\driver\usb\usb_driver.exe
  • %WINDIR%\winlogin.exe
Network activity:
Connects to:
  • 'im.###imum-irc.info':9595
UDP:
  • DNS ASK im.###imum-irc.info