Basit Farooq Alvi along with his brother Amjad Farooq Alvi created the Brain boot sector computer virus that was released in its first form in January 1986 and is considered to be the first computer virus for MS-DOS.
The virus came complete with the brothers' address and three phone numbers, and a message that told the user that their machine was infected and to call them for inoculation:
Welcome to the Dungeon © 1986 Brain & Amjads (pvt). BRAIN COMPUTER SERVICES 730 NIZAM BLOCK ALLAMA IQBAL TOWN LAHORE-PAKISTAN PHONE: 430791,443248,280530. Beware of this VIRUS.... Contact us for vaccination...