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  2. ABC (computer virus) - Wikipedia

    en.wikipedia.org/wiki/ABC_(computer_virus)

    ABC, discovered in October 1992, is a memory-resident, file-infecting computer virus which infects EXE files and may alter both COM and EXE files. ABC activates on the 13th day of every month. Upon infection, ABC becomes memory-resident at the top of system memory but below the 640 K DOS boundary and hooks interrupts 16 and 1C.

  3. AIDS (computer virus) - Wikipedia

    en.wikipedia.org/wiki/AIDS_(computer_virus)

    AIDS II works by first finding an uninfected EXE file in the working directory and then creating a companion COM file with the viral code. The COM files will always be 8,064 bytes in length, with a timestamp corresponding to the time of infection. After creating the new COM file, the virus then plays a loud note, and displays the following ...

  4. 4K (computer virus) - Wikipedia

    en.wikipedia.org/wiki/4K_(computer_virus)

    4k is a computer virus which infects COM files and EXE files.The virus was one of the first file infectors to employ stealth tactics. [2] Infected systems will hang, after September 22 every year, which is also the date of birth of Bilbo Baggins, a character from The Lord of the Rings.

  5. Jerusalem (computer virus) - Wikipedia

    en.wikipedia.org/wiki/Jerusalem_(computer_virus)

    It can re-infect .EXE files, and will increase the size of already infected .EXE files by 1,808 bytes. [10] Jerusalem-VT1: If the virus is memory-resident, it will delete any file run on Tuesday the 1st. [10] Jerusalem-T13: The virus causes .COM and .EXE files to grow by 1,812 bytes. If the virus is memory-resident, it will delete any program ...

  6. Alabama (computer virus) - Wikipedia

    en.wikipedia.org/wiki/Alabama_(computer_virus)

    Instead of searching for a file to infect, Alabama searches for a file to cross-reference. The virus modifies the FAT entry so that when the user executes one file, another will appear. For instance, on a machine where Alabama is resident, executing PROGRAM1.EXE on a Friday may cause the virus to search for another program and find PROGRAM2.EXE.

  7. Acid (computer virus) - Wikipedia

    en.wikipedia.org/wiki/Acid_(computer_virus)

    Acid is a computer virus which infects .COM and .EXE files including command.com. Each time an infected file is executed, Acid infects all of the .EXE files in the current directory. Later, if an infected file is executed, it infects the .COM files in the current directory.