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Win32.HLLW.Autoruner2.8338

Added to the Dr.Web virus database: 2014-02-22

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'loadinfo' = 'wininfo.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Internet Explorer\Extensions\{06926B30-226E-4f8c-8EE3-579CD96573DC}] 'Exec' = 'http://www.dmtoy.com'
Creates the following files on removable media:
  • <Drive name for removable media>:\readme.doc.exe
  • <Drive name for removable media>:\AUTORUN.INF
Malicious functions:
Creates and executes the following:
  • '<SYSTEM32>\DirectX\DirectX.exe'
  • '<SYSTEM32>\wininfo.exe'
  • '<DRIVERS>\DefragFs.exe'
Executes the following:
  • '<SYSTEM32>\cmd.exe' /c <SYSTEM32>\directx\abc.bat
  • '%WINDIR%\regedit.exe' /s <SYSTEM32>\directx\bbb.reg
  • '<SYSTEM32>\cmd.exe' /c <Current directory>\a.bat
  • '<SYSTEM32>\attrib.exe' -a -r -s -h <Full path to virus>
Searches for windows to
bypass different anti-viruses:
  • ClassName: 'AVP.AlertDialog' WindowName: '(null)'
Modifies file system :
Creates the following files:
  • <SYSTEM32>\DirectX\abc.bat
  • <SYSTEM32>\DirectX\bbb.reg
  • C:\readme.doc.exe
  • C:\AUTORUN.INF
  • <SYSTEM32>\DirectX\DirectX.exe
  • <DRIVERS>\DefragFs.exe
  • <SYSTEM32>\wininfo.exe
  • <Current directory>\a.bat
Sets the 'hidden' attribute to the following files:
  • C:\readme.doc.exe
  • <Drive name for removable media>:\AUTORUN.INF
  • <Drive name for removable media>:\readme.doc.exe
  • C:\AUTORUN.INF
  • <DRIVERS>\DefragFs.exe
  • <SYSTEM32>\wininfo.exe
  • <SYSTEM32>\DirectX\DirectX.exe
Deletes the following files:
  • <SYSTEM32>\DirectX\bbb.reg
  • %TEMP%\~DFCE10.tmp
Deletes itself.
Miscellaneous:
Searches for the following windows:
  • ClassName: '(null)' WindowName: 'ADform'
  • ClassName: '(null)' WindowName: 'adupdate_onlink'
  • ClassName: 'RegEdit_RegEdit' WindowName: '(null)'
  • ClassName: 'Afx:400000:0' WindowName: '(null)'
  • ClassName: '(null)' WindowName: 'AD_1'
  • ClassName: '(null)' WindowName: '???????????-?????...'
  • ClassName: '(null)' WindowName: 'AD_3'
  • ClassName: '(null)' WindowName: 'AD_2'