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Win32.HLLW.Autoruner1.28029

Added to the Dr.Web virus database: 2012-10-16

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run] '1' = '%WINDIR%\Serbck.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe WinService.exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\CloseWindow.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
Executes the following:
  • <SYSTEM32>\attrib.exe +h +a +s +r S:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r R:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r R:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r T:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r T:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r S:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r P:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r O:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r O:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r Q:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r Q:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r P:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r Y:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r X:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r X:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r Z:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r Z:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r Y:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r V:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r U:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r U:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r W:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r W:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r V:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +s +a +r N:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +s +a +r F:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r F:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r E:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r H:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r G:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r G:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r C:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r C:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +a +s +r %WINDIR%\Serbck.exe
  • <SYSTEM32>\attrib.exe +h +a +s +r E:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r <Drive name for removable media>:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r <Drive name for removable media>:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r L:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r L:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r K:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r N:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r M:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r M:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r I:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r I:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r H:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r K:\CloseWindow.exe
  • <SYSTEM32>\attrib.exe +h +s +a +r J:\autorun.inf
  • <SYSTEM32>\attrib.exe +h +a +s +r J:\CloseWindow.exe
Modifies file system :
Creates the following files:
  • C:\autorun.inf
  • C:\CloseWindow.exe
  • <SYSTEM32>\WinService.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\CloseWindow.exe
  • <Drive name for removable media>:\autorun.inf
  • C:\autorun.inf
  • <Full path to virus>
  • C:\CloseWindow.exe