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Win32.HLLW.Autoruner1.34215

Added to the Dr.Web virus database: 2013-03-20

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run] 'dlnajjbdfa' = '%WINDIR%\system\llwzjy081017.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>\ping.exe 127.0.0.1
  • <SYSTEM32>\cmd.exe /c ""c:\dfDelmlljy.bat" "
  • <SYSTEM32>\ntsd.exe -c q -p 1524
Injects code into
the following user processes:
  • 360tray.exe
Modifies file system :
Creates the following files:
  • C:\dfDelmlljy.bat
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\mydown[1].asp
  • %WINDIR%\mydown.asp
  • %WINDIR%\system\llwzjy081017.exe
  • %ALLUSERSPROFILE%\jjjydf16.ini
  • %WINDIR%\system\mvjaj32dla.dll
Deletes the following files:
  • %WINDIR%\mydown.asp
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\mydown[1].asp
Deletes itself.
Network activity:
Connects to:
  • 'www.xx##w.cn':80
  • 'localhost':1036
TCP:
HTTP GET requests:
  • www.xx##w.cn/8888/mydown.asp?ve#########################################
UDP:
  • DNS ASK www.xx##w.cn
Miscellaneous:
Searches for the following windows:
  • ClassName: 'MS_WebcheckMonitor' WindowName: ''
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: '#32770' WindowName: 'Windows ??????????'
  • ClassName: 'MS_AutodialMonitor' WindowName: ''
  • ClassName: 'CabinetWClass' WindowName: ''
  • ClassName: 'IEFrame' WindowName: ''
  • ClassName: '' WindowName: ''