Risk Level 1: Very Low

February 17, 1995
February 13, 2007 11:47:37 AM
Also Known As:

NYB is a simple virus that infects Master Boot Records (MBR) and DOS boot sectors (DBS). NYB spreads to a system only when there is an attempt to boot the system from an infected floppy disk.

Antivirus Protection Dates

  • Initial Rapid Release version February 17, 1995
  • Latest Rapid Release version August 20, 2008 revision 017
  • Initial Daily Certified version February 17, 1995
  • Latest Daily Certified version August 20, 2008 revision 016
  • Initial Weekly Certified release date pending
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Low
  • Number of Infections: 0 - 49
  • Number of Sites: 0 - 2
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Easy


  • Damage Level: Low


  • Distribution Level: Low
Note: On May 14, 2015, modifications will be made to the threat write-ups to streamline the content. The Threat Assessment section will no longer be published as this section is no longer relevant to today's threat landscape. The Risk Level will continue to be the main threat risk assessment indicator.

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