. . "*DOS executable"@en . "Virus.DOS.Virdem is a parasitic virus on DOS. It was the first file infecting virus on this system, and it appeared almost a year after the distribution of the Pakistani Brain boot sector virus. There are 16 variants in 5 versions, represented by the following: \n* Virus.DOS.Virdem.463 \n* Virus.DOS.Virdem.601 \n* Virus.DOS.Virdem.792 \n* Virus.DOS.Virdem.1336 \n* Virus.DOS.Virdem.1542"@en . . "Virdem was the first file virus for the DOS operating system. It appeared almost a year after the Pakistani Brain boot sector virus."@en . . . "Assembly"@en . "Virus"@en . "December, 1986"@en . "MS-DOS"@en . . . . "Virus.DOS.Virdem is a parasitic virus on DOS. It was the first file infecting virus on this system, and it appeared almost a year after the distribution of the Pakistani Brain boot sector virus. There are 16 variants in 5 versions, represented by the following: \n* Virus.DOS.Virdem.463 \n* Virus.DOS.Virdem.601 \n* Virus.DOS.Virdem.792 \n* Virus.DOS.Virdem.1336 \n* Virus.DOS.Virdem.1542"@en . . "Virdem was the first file virus for the DOS operating system. It appeared almost a year after the Pakistani Brain boot sector virus."@en . . . "Hamburg, Germany"@en . "Virdem"@en . "*VirDem\n*Burger"@en . "Raff Burger"@en . . . "Virdem"@en .