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Win32.HLLW.Autoruner.60020

Added to the Dr.Web virus database: 2011-09-25

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe,Documents.exe'
Creates the following files on removable media:
  • <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
blocks execution of the following system utilities:
  • Windows Task Manager (Taskmgr)
  • Registry Editor (RegEdit)
Modifies settings of Windows Explorer:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFolderOptions' = '00000001'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFind' = '00000001'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoControlPanel' = '00000001'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoRun' = '00000001'
Modifies file system :
Creates the following files:
  • <Current directory>\Autorun.inf
  • %WINDIR%\Autorun.inf
Sets the 'hidden' attribute to the following files:
  • <Current directory>\Autorun.inf
  • <Drive name for removable media>:\Autorun.inf
Deletes the following files:
  • <Current directory>\Autorun.inf
  • <Drive name for removable media>:\Autorun.inf
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