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Profil

Win32.HLLW.Autoruner1.35532

Added to the Dr.Web virus database: 2013-04-24

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Winlogon' = '%WINDIR%\winlogon.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Winlogon' = '%WINDIR%\winlogon.exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\autorun.exe
Malicious functions:
Creates and executes the following:
  • '%WINDIR%\winhelp32.exe'
  • '%WINDIR%\winlogon.exe'
  • '%WINDIR%\winhelp32.exe' (downloaded from the Internet)
Modifies file system :
Creates the following files:
  • %TEMP%\a85.exe
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\VERSION[1].TXT
  • %WINDIR%\version.txt
  • %WINDIR%\winhelp32.exe
  • %WINDIR%\winlogon.exe
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\default2[1].html
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\DATA[1]
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\autorun.exe
  • <Drive name for removable media>:\autorun.inf
Network activity:
Connects to:
  • 'tu###eru.net':80
  • 'tu###eru.org':80
  • 'localhost':1036
  • 'in####.powweb.com':80
TCP:
HTTP GET requests:
  • tu###eru.org/VERSION.TXT
  • tu###eru.net/DATA
  • in####.powweb.com/default2.html
UDP:
  • DNS ASK tu###eru.org
  • DNS ASK tu###eru.net
  • DNS ASK in####.powweb.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'MS_AutodialMonitor' WindowName: ''
  • ClassName: 'MS_WebcheckMonitor' WindowName: ''
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'Indicator' WindowName: ''