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Win32.HLLW.Autoruner1.34781

Added to the Dr.Web virus database: 2013-04-02

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'System' = '<SYSTEM32>\1033\Microsoft\Drivers\System.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Services' = '<SYSTEM32>\1033\Microsoft\Drivers\CSRSS.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows Idle Process' = '%WINDIR%\SMSS.EXE'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Yahoo! Messenger Pager' = '<SYSTEM32>\1033\Microsoft\Drivers\Home Video.exe'
  • [<HKLM>\SOFTWARE\Classes\.cmd] '' = 'regfile'
  • [<HKLM>\SOFTWARE\Classes\.com] '' = 'regfile'
  • [<HKLM>\SOFTWARE\Classes\.bat] '' = 'regfile'
Creates or modifies the following files:
  • %ALLUSERSPROFILE%\Start Menu\Programs\Startup\LSASS.EXE
Creates the following files on removable media:
  • <Drive name for removable media>:\Home Video.avi.exe
  • <Drive name for removable media>:\CSRSS.exe
  • <Drive name for removable media>:\autorun.inf
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
  • file extensions
blocks execution of the following system utilities:
  • Command Prompt (CMD)
Terminates or attempts to terminate
the following user processes:
  • ekrn.exe
  • AVPM.EXE
  • AVP.EXE
Modifies settings of Windows Internet Explorer:
  • [<HKCU>\Software\Microsoft\Internet Explorer\Main] 'Window Title' = 'Ahsan Manan Khan Bhutta * Internet Explorer *'
Forces autoplay for removable media.
Sets a new unauthorized home page for Windows Internet Explorer.
Modifies file system :
Creates the following files:
  • C:\autorun.inf
  • %WINDIR%\SMSS.EXE
  • C:\Home Video.avi.exe
  • C:\CSRSS.exe
  • <SYSTEM32>\1033\Microsoft\Drivers\CSRSS.exe
  • <SYSTEM32>\1033\Microsoft\Drivers\autorun.inf
  • <SYSTEM32>\1033\Microsoft\Drivers\Home Video.exe
  • <SYSTEM32>\1033\Microsoft\Drivers\System.exe
Sets the 'hidden' attribute to the following files:
  • C:\CSRSS.exe
  • C:\autorun.inf
  • <Drive name for removable media>:\CSRSS.exe
  • <Drive name for removable media>:\autorun.inf
  • %WINDIR%\SMSS.EXE
  • <SYSTEM32>\1033\Microsoft\Drivers\CSRSS.exe
  • <SYSTEM32>\1033\Microsoft\Drivers\System.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Startup\LSASS.EXE
  • <SYSTEM32>\1033\Microsoft\Drivers\autorun.inf
Deletes the following files:
  • <Drive name for removable media>:\autorun.inf
  • C:\autorun.inf
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''