Brain is the industry standard name for a computer virus that was released in its first form in January 1986,and is considered to be the first computer virus for MS-DOS. It infects the boot sector of storage media formatted with the DOS File Allocation Table (FAT) file system. Brain was written by two brothers, Basit Farooq Alvi and Amjad Farooq Alvi,from Lahore, Pakistan.
Read the complete wikki Brain (PC virus)