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Win32.HLLW.Autoruner1.11358

Added to the Dr.Web virus database: 2012-01-28

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'kb' = '<SYSTEM32>\auto.txt'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'shell' = 'Explorer.exe "%WINDIR%\csrss.exe"'
Creates the following files on removable media:
  • <Drive name for removable media>:\AUTORUN.INF
  • <Drive name for removable media>:\camp.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
  • file extensions
Terminates or attempts to terminate
the following user processes:
  • MCAGENT.EXE
Modifies settings of Windows Explorer:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] 'NoFolderOptions' = ''
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'Nofolderoptions' = ''
Modifies file system :
Creates the following files:
  • <DRIVERS>\intel.exe
  • C:\camp.exe
  • C:\AUTORUN.INF
  • %WINDIR%\Autorun.inf
  • %WINDIR%\csrss.exe
Sets the 'hidden' attribute to the following files:
  • C:\AUTORUN.INF
  • <Drive name for removable media>:\camp.exe
  • <Drive name for removable media>:\AUTORUN.INF
  • %WINDIR%\csrss.exe
  • <DRIVERS>\intel.exe
  • C:\camp.exe
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Edit' WindowName: ''
  • ClassName: 'ComboBox' WindowName: ''
  • ClassName: 'ComboBoxEx32' WindowName: ''
  • ClassName: '#32770' WindowName: ''
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: '' WindowName: 'Administrative Tools'
  • ClassName: '' WindowName: 'search results'
  • ClassName: '' WindowName: 'Folder Options'
  • ClassName: '' WindowName: 'Registry Editor'
  • ClassName: 'RegEdit_RegEdit' WindowName: ''
  • ClassName: '' WindowName: 'Local Settings'
  • ClassName: 'RebarWindow32' WindowName: ''
  • ClassName: 'CabinetWClass' WindowName: ''
  • ClassName: 'ExploreWClass' WindowName: ''