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Win32.HLLW.Autoruner1.61553

Added to the Dr.Web virus database: 2013-11-23

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Classes\.cmd] '' = '.txt'
  • [<HKLM>\SOFTWARE\Classes\.exe] '' = '.txt'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = '<Full path to virus>'
Substitutes the following executable system files:
  • <SYSTEM32>\dllcache\taskmgr.exe with <SYSTEM32>\dllcache\taskmgr.exe.new
  • <SYSTEM32>\dllcache\notepad.exe with <SYSTEM32>\dllcache\notepad.exe.new
  • <SYSTEM32>\taskmgr.exe with <SYSTEM32>\taskmgr.exe.new
  • <SYSTEM32>\notepad.exe with <SYSTEM32>\notepad.exe.new
Infects the following executable files:
  • <SYSTEM32>\dllcache\notepad.exe.new
  • <SYSTEM32>\dllcache\taskmgr.exe.new
Malicious functions:
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
  • Registry Editor (RegEdit)
Executes the following:
  • '<SYSTEM32>\taskkill.exe' /im /f chrome.exe
  • '<SYSTEM32>\taskkill.exe' /im /f ie.exe
  • '<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoDesktop /t REG_DWORD /d 1 /f
  • '<SYSTEM32>\reg.exe' add HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoDriveTypeAutoRun /t REG_DWORD /d 0xFF /f
  • '<SYSTEM32>\taskkill.exe' /im /f firefox.exe
  • '<SYSTEM32>\taskkill.exe' /f /im explorer.exe
  • '<SYSTEM32>\taskkill.exe' /f /im skype.exe
  • '<SYSTEM32>\taskkill.exe' /im /f opera.exe
  • '<SYSTEM32>\taskkill.exe' /im /f safari.exe
  • '<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Polices\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
  • '<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableCMD /t REG_DWORD /d 2 /f
  • '<SYSTEM32>\cmd.exe' /c ""%TEMP%\System.bat" "
  • '<SYSTEM32>\taskkill.exe' /im /f explorer.exe
  • '<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 1 /f
  • '<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\Current Version\Policies\Explorer/v NoControlPanel /t REG_DWORD /d 1 /f
  • '<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\ExplorerRestrictRun /v 1 /t REG_DWORD /d %WINDIR%\explorer.exe /f
  • '<SYSTEM32>\reg.exe' Delete HKLM\System\CurrentControlSet\Control\SafeBoot\*.* /q
  • '<SYSTEM32>\reg.exe' Delete HKLM\System\CurrentControlSet\Control\SafeBoot /q
Terminates or attempts to terminate
the following system processes:
  • %WINDIR%\Explorer.EXE
the following user processes:
  • skype.exe
Modifies settings of Windows Explorer:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoDesktop' = '00000001'
Forces autoplay for removable media.
Modifies file system :
Creates the following files:
  • %TEMP%\System.bat
Deletes the following files:
  • %WINDIR%\Media\Windows XP Startup.wav
  • %WINDIR%\Media\Windows XP Start.wav
  • %WINDIR%\Media\Windows XP Shutdown.wav
  • %WINDIR%\Web\Wallpaper\Ascent.jpg
  • %WINDIR%\Web\Wallpaper\Bliss.bmp
  • %WINDIR%\Web\Wallpaper\Azul.jpg
  • %WINDIR%\Web\Wallpaper\Autumn.jpg
  • %WINDIR%\Media\Windows XP Ringout.wav
  • %WINDIR%\Media\Windows XP Pop-up Blocked.wav
  • %WINDIR%\Media\Windows XP Notify.wav
  • %WINDIR%\Media\Windows XP Minimize.wav
  • %WINDIR%\Media\Windows XP Print complete.wav
  • %WINDIR%\Media\Windows XP Ringin.wav
  • %WINDIR%\Media\Windows XP Restore.wav
  • %WINDIR%\Media\Windows XP Recycle.wav
  • %WINDIR%\Web\Wallpaper\Crystal.jpg
  • %WINDIR%\Web\Wallpaper\Stonehenge.jpg
  • %WINDIR%\Web\Wallpaper\Ripple.jpg
  • %WINDIR%\Web\Wallpaper\Red moon desert.jpg
  • %WINDIR%\Web\Wallpaper\Tulips.jpg
  • %WINDIR%\Web\Wallpaper\Windows XP.jpg
  • %WINDIR%\Web\Wallpaper\Wind.jpg
  • %WINDIR%\Web\Wallpaper\Vortec space.jpg
  • %WINDIR%\Web\Wallpaper\Radiance.jpg
  • %WINDIR%\Web\Wallpaper\Home.jpg
  • %WINDIR%\Web\Wallpaper\Friend.jpg
  • %WINDIR%\Web\Wallpaper\Follow.jpg
  • %WINDIR%\Web\Wallpaper\Moon flower.jpg
  • %WINDIR%\Web\Wallpaper\Purple flower.jpg
  • %WINDIR%\Web\Wallpaper\Power.jpg
  • %WINDIR%\Web\Wallpaper\Peace.jpg
  • %WINDIR%\Media\recycle.wav
  • %WINDIR%\Media\onestop.mid
  • %WINDIR%\Media\notify.wav
  • %WINDIR%\Media\ringin.wav
  • %WINDIR%\Media\tada.wav
  • %WINDIR%\Media\start.wav
  • %WINDIR%\Media\ringout.wav
  • %WINDIR%\Media\flourish.mid
  • <SYSTEM32>\notepad.exe
  • <SYSTEM32>\taskmgr.exe
  • <SYSTEM32>\hal.dll
  • %WINDIR%\Driver Cache\i386\driver.cab
  • %WINDIR%\Media\ding.wav
  • %WINDIR%\Media\chord.wav
  • %WINDIR%\Media\chimes.wav
  • %WINDIR%\Media\town.mid
  • %WINDIR%\Media\Windows XP Hardware Remove.wav
  • %WINDIR%\Media\Windows XP Hardware Insert.wav
  • %WINDIR%\Media\Windows XP Hardware Fail.wav
  • %WINDIR%\Media\Windows XP Information Bar.wav
  • %WINDIR%\Media\Windows XP Menu Command.wav
  • %WINDIR%\Media\Windows XP Logon Sound.wav
  • %WINDIR%\Media\Windows XP Logoff Sound.wav
  • %WINDIR%\Media\Windows XP Exclamation.wav
  • %WINDIR%\Media\Windows XP Battery Low.wav
  • %WINDIR%\Media\Windows XP Battery Critical.wav
  • %WINDIR%\Media\Windows XP Balloon.wav
  • %WINDIR%\Media\Windows XP Critical Stop.wav
  • %WINDIR%\Media\Windows XP Error.wav
  • %WINDIR%\Media\Windows XP Ding.wav
  • %WINDIR%\Media\Windows XP Default.wav
Moves the following files:
  • from <SYSTEM32>\dllcache\notepad.exe.new to <SYSTEM32>\dllcache\notepad.exe
  • from <SYSTEM32>\dllcache\taskmgr.exe.new to <SYSTEM32>\dllcache\taskmgr.exe
Miscellaneous:
Searches for the following windows:
  • ClassName: '(null)' WindowName: '(null)'