Chapter 15 Unified Threat Management for FortiOS 5.0 : AntiVirus : Antivirus concepts : Antivirus techniques : Grayware
  
Grayware
If the file passes the virus scan, it will be checked for grayware. Grayware configurations can be turned on and off as required and are kept up to date in the same manner as the antivirus definitions. For more information, see “Grayware scanning”.