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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. [1] Trojans are generally spread by some form of social engineering.
Traditional computer viruses emerged in the 1980s, driven by the spread of personal computers and the resultant increase in bulletin board system (BBS), modem use, and software sharing. Bulletin board–driven software sharing contributed directly to the spread of Trojan horse programs, and viruses were written to infect popularly traded software.
It takes on various forms including but not limited to ransomware, spyware, trojan horses, viruses, and worms. The evolution of malware reflects the rapid advancements in technology and the internet.
Unlike computer viruses and worms, Trojan horses generally do not attempt to inject themselves into other files or otherwise propagate themselves. [ 45 ] In spring 2017, Mac users were hit by the new version of Proton Remote Access Trojan (RAT) [ 46 ] trained to extract password data from various sources, such as browser auto-fill data, the Mac ...
A malicious computer program that tricks users into willingly running it is also called a "Trojan horse" or simply a "Trojan". The main ancient source for the story still extant is the Aeneid of Virgil, a Latin epic poem from the time of Augustus .
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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