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Profil

Win32.HLLW.Autoruner1.10835

Added to the Dr.Web virus database: 2012-01-09

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'My App' = '<SYSTEM32>\system.exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\system.exe
  • <Drive name for removable media>:\Autorun.inf
Malicious functions:
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
  • Windows Task Manager (Taskmgr)
  • Registry Editor (RegEdit)
Executes the following:
  • <SYSTEM32>\format.com f: /q /u /y
  • <SYSTEM32>\format.com g: /q /u /y
  • <SYSTEM32>\format.com h: /q /u /y
  • <SYSTEM32>\format.com e: /q /u /y
  • <SYSTEM32>\cmd.exe /c <SYSTEM32>\system.bat
  • <SYSTEM32>\format.com c: /q /u /y
  • <SYSTEM32>\format.com d: /q /u /y
Modifies settings of Windows Explorer:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFind' = '00000001'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoRun' = '00000001'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] 'NoFolderOptions' = '00000001'
Modifies file system :
Creates the following files:
  • C:\Autorun.inf
  • C:\system.exe
  • <Auxiliary element>
  • <SYSTEM32>\system.bat
  • <SYSTEM32>\system.exe
  • <SYSTEM32>\system.inf
Sets the 'hidden' attribute to the following files:
  • C:\system.exe
  • C:\Autorun.inf
  • <Drive name for removable media>:\system.exe
  • <Drive name for removable media>:\Autorun.inf
  • <SYSTEM32>\system.inf
  • <Full path to virus>
  • <SYSTEM32>\system.exe
  • <SYSTEM32>\system.bat