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Win32.HLLW.Autoruner.56951

Added to the Dr.Web virus database: 2011-08-25

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'ctfnom' = 'C:\Dir\ctfnom.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'wextract_cleanup0' = 'rundll32.exe <SYSTEM32>\advpack.dll,DelNodeRunDLL32 ""%TEMP%\IXP000.TMP\""'
Creates the following files on removable media:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\Mirc.exe
Malicious functions:
Creates and executes the following:
  • C:\Dir\ctfnom.exe 
Executes the following:
  • <SYSTEM32>\cmd.exe /c C:\runner.bat
  • <SYSTEM32>\net1.exe stop sharedaccess
  • <SYSTEM32>\net.exe stop sharedaccess
Modifies file system :
Creates the following files:
  • C:\runner.bat
  • C:\Dir\Dated.dat
  • %TEMP%\IXP000.TMP\01.Exe
  • C:\Dir\ctfnom.exe
Sets the 'hidden' attribute to the following files:
  • C:\Dir\ctfnom.exe
Deletes the following files:
  • %TEMP%\IXP000.TMP\01.Exe
Network activity:
Connects to:
  • 'da####vil.no-ip.org':2185
UDP:
  • DNS ASK da####vil.no-ip.org
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: ''