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What is a worm?

A worm is a virus that does not infect other programs. It makes copies of itself, and infects additional computers (typically by making use of network connections) but does not attach itself to additional programs; however a worm might alter, install, or destroy files and programs.


The Melissa Worm, also known as "Mailissa", "Simpsons", "Kwyjibo", or "Kwejeebo", is a computer worm that also functions as a macro virus, hence making it a "multipartite virus".

Code Red:

The Code Red worm was a computer worm released via the Internet on July 13, 2001 affecting computers running Microsoft's Internet Information Server (IIS) web server. The programmers at eEye Digital Security who reported it named it after both the Mountain Dew soft drink and the phrase "Hacked By Chinese!" (see Red Scare) that it propagated. The worm exploited a vulnerability in the indexing software distributed with IIS and did several things: * It defaced the affected web site to display:*: "H