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Profil

Win32.HLLW.Autoruner.51963

Added to the Dr.Web virus database: 2011-06-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\lsass.exe"'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\lsass.exe"'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe "%APPDATA%\lsass.exe"'
Creates the following files on removable media:
  • <Drive name for removable media>:\Autorun.inf
  • <Drive name for removable media>:\SYSTEM.EXE
Malicious functions:
Creates and executes the following:
  • %APPDATA%\lsass.exe 
Executes the following:
  • <SYSTEM32>\netsh.exe firewall add allowedprogram program = %APPDATA%\lsass.exename = Nero mode = ENABLE
Modifies file system :
Creates the following files:
  • %APPDATA%\lsass.exe
  • %TEMP%\ac942532b3480112bc5a0dd5c800f464.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\Autorun.inf
  • <Drive name for removable media>:\SYSTEM.EXE
  • %APPDATA%\lsass.exe
Deletes the following files:
  • %TEMP%\ac942532b3480112bc5a0dd5c800f464.exe
Network activity:
Connects to:
  • 'y5#.#o-ip.info':3175
UDP:
  • DNS ASK y5#.#o-ip.info
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: ''
  • ClassName: '' WindowName: 'HB'

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