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Win32.HLLW.Autoruner.51866

Added to the Dr.Web virus database: 2011-06-16

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\htoad] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\htuad] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\stuad] 'Start' = '00000002'
Creates the following files on removable media:
  • <Drive name for removable media>:\RECYCLER\W
  • <Drive name for removable media>:\Autorun.inf
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<Full path to virus>' = '<Full path to virus>:*:Enabled:Complete Server For Remote Administration via the Internet or LANWin32'
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
  • Windows Task Manager (Taskmgr)
  • Registry Editor (RegEdit)
Modifies file system :
Creates the following files:
  • <SYSTEM32>\svshost
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\Autorun.inf
Network activity:
Connects to:
  • 'www.pr###ysoft.com':21
UDP:
  • DNS ASK www.pr###ysoft.com
Miscellaneous:
Searches for the following windows:
  • ClassName: '' WindowName: ''
  • ClassName: '' WindowName: 'System Configuration Utility'
  • ClassName: 'Shell_TrayWnd' WindowName: ''