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2. Comparison of computer viruses - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_computer_viruses

   To combat computer viruses and other malicious software, many security advisory organizations and anti-virus software developers compile and publish virus lists. When a new virus appears, the rush begins to identify and understand it as well as develop appropriate counter-measures to stop its propagation.

3. 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 640K DOS boundary and hooks interrupts 16 and 1C.

4. 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.

5. Acme (computer virus) - Wikipedia

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

   Acme is a computer virus which infects MS-DOS EXE files. Each time an infected file is executed, Acme may infect an EXE in the current directory by creating a hidden 247 byte long read-only COM file with the same base name. (In MS-DOS, if the file extension is not specified, and two files with the same base name exist, one with .COM and one ...

6. Jerusalem (computer virus) - Wikipedia

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

   One of the clues that a computer is infected is the mis-capitalization of the well-known message "Bad command or file name" as "Bad Command or file name". The Jerusalem virus is unique among other viruses of the time, as it is a logic bomb , set to go off on Friday the 13th on all years but 1987 (making its first activation date 13 May 1988). [ 3 ]

7. Malware - Wikipedia

   en.wikipedia.org/wiki/Malware

   An example of this is a portable execution infection, a technique, usually used to spread malware, that inserts extra data or executable code into PE files. [34] A computer virus is software that embeds itself in some other executable software (including the operating system itself) on the target system without the user's knowledge and consent ...