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Win32.HLLW.Autoruner1.14760

Added to the Dr.Web virus database: 2012-04-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe, C:\Seguridad\ctfmon.exe'
  • [<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe, C:\Seguridad\ctfmon.exe'
  • [<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows] 'Load' = 'C:\Seguridad\ctfmon.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'index' = 'C:\Seguridad\ctfmon.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'index' = 'C:\Seguridad\ctfmon.exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\AutoRun.inf
  • <Drive name for removable media>:\Seguridad\@b@ddon.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
  • file extensions
Creates and executes the following:
  • C:\Seguridad\ctfmon.exe
Modifies file system :
Creates the following files:
  • C:\RECYCLED\network.pcap
  • C:\RECYCLED\dwshield.log
  • C:\RECYCLED\NTDETECT.COM
  • C:\AutoRun.inf
  • C:\RECYCLED\ntldr
  • C:\Bootfont.sys
  • C:\Seguridad\ctfmon.exe
  • C:\Seguridad\@b@ddon.exe
  • C:\RECYCLED\Bootfont.sys
  • C:\RECYCLED\boot.ini
Sets the 'hidden' attribute to the following files:
  • C:\AutoRun.inf
  • <Drive name for removable media>:\Seguridad\@b@ddon.exe
  • <Drive name for removable media>:\AutoRun.inf
  • C:\Bootfont.sys
  • C:\Seguridad\ctfmon.exe
  • C:\Seguridad\@b@ddon.exe
Miscellaneous:
Searches for the following windows:
  • ClassName: '' WindowName: ''
  • ClassName: 'Indicator' WindowName: ''
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'MS_WINHELP' WindowName: ''