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A computer virus [1] is a type of malware that, when executed, replicates itself by modifying other computer programs and inserting its own code into those programs. [2] [3] If this replication succeeds, the affected areas are then said to be "infected" with a computer virus, a metaphor derived from biological viruses. [4]
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.
They have been likened to biological viruses. [3] 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]
Appearance of Lehigh virus (discovered at its namesake university), [20] boot sector viruses such as Yale from the US, Stoned from New Zealand, Ping Pong from Italy, and appearance of the first self-encrypting file virus, Cascade. Lehigh was stopped on campus before it spread to the "wild" (to computers beyond the university), and as a result ...
In computing, a Trojan horse (or simply Trojan) is a malware that misleads users of its true intent by disguising itself as a normal program. The term is derived from the ancient Greek story of the deceptive Trojan Horse that led to the fall of the city of Troy.
Dismissing it would reboot the computer and then display the message again. Klez: October 2001 Koobface: December 2008 Targeted MySpace and Facebook users with a heading of "Happy Holidays". Leap-A: Oompa-Loompa Trojan worm February 14, 2006 Most known for being the first virus targeting Mac computers. Morris: November 2, 1988 Robert Tappan Morris
Pages in category "Computer viruses" The following 35 pages are in this category, out of 35 total. This list may not reflect recent changes. ...
Computer viruses generally require a host program. [11] The virus writes its own code into the host program. When the program runs, the written virus program is executed first, causing infection and damage. A worm does not need a host program, as it is an independent program or code chunk.
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