Malware, short for malicious software, is software designed to disrupt computer operation, gather sensitive information, or gain unauthorized access to computer systems. While it is sometimes software, it can also appear in the form of script or code. Malware is a general term used to describe any kind of software or code specifically designed to exploit a computer, or the data it contains, without consent. The expression is a general term used by computer professionals to mean a variety of forms of hostile, intrusive, or annoying software.

Malware includes computer viruses, worms, trojan horses, spyware, adware, most rootkits, and other malicious programs. In law, malware is sometimes known as a computer contaminant, for instance in the legal codes of several U.S. states, including California and West Virginia.

Malware is not the same as defective software, which is software that has a legitimate purpose but contains harmful bugs that were not noticed before release. Sometimes, malware is disguised as genuine software, and may come from an official company website. An example would be software used for useful purposes that also includes tracking software to gather marketing statistics for advertising.

Therefore, some security programs may find "potentially unwanted programs" or "PUP". Though a computer virus is malware that can reproduce itself, the term is sometimes used erroneously to refer to the entire category. An example of a computer virus which is not a malware, but is benevolent is Fred Cohen's compression virus.

Noun

Malware

Wikipedia malware (uncountable)

1. (computing) Software developed for the purpose of causing harm to a computer system

See also

• adware
• backdoor
• dialer, dialler
• exploit
• key logger
• spyware
• rootkit

• trojan
• URL injection
• virus
• worm
• wabbit
• -ware

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