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Win32.HLLW.Autoruner1.11236

Added to the Dr.Web virus database: 2012-01-26

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Spoolsrv' = '<SYSTEM32>\spoolsrv.exe'
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:
  • Windows Task Manager (Taskmgr)
Modifies settings of Windows Explorer:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFolderOptions' = '00000001'
Modifies file system :
Creates the following files:
  • <SYSTEM32>\spoolsrv.ini
  • <SYSTEM32>\spoolsrv.exe
Sets the 'hidden' attribute to the following files:
  • <SYSTEM32>\spoolsrv.exe
Miscellaneous:
Searches for the following windows:
  • ClassName: 'TfmMainUSBDetect' WindowName: ''