A computer worm is a self-replicating computer program. It uses a network to send copies of itself to other nodes (computers on the network) and it may do so without any user intervention. Unlike a virus, it does not need to attach itself to an existing program. Worms almost always cause at least some harm to the network, if only by consuming bandwidth, whereas viruses almost always corrupt or devour files on a targeted computer.

Many worms that have been created are only designed to spread, and don’t attempt to alter the systems they pass through. A “payload”, however, is code designed to do more than spread the worm it might delete files on a host system, encrypt files in a cryptoviral extortion attack, or send documents via e-mail. A very common payload for worms is to install a backdoor in the infected computer to allow the creation of a zombie (an Internet accessible computer compromised by a hacker) under control of the worm author. Networks of such machines are often referred to as botnets and are very commonly used by spam senders for sending junk email or to cloak their website’s address.

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There are currently 963 articles listed on worms.

Name Threat Level Detection Count Date
'U.Z.A. Operating System' Wallpaper March 19, 2009
ACAD/Medre.A 5/10 0 June 22, 2012
ALS.Kenilfe!inf February 28, 2011
Artemis!DD51CDCC10D0 June 8, 2010
Autoit.Obfus 9/10 3 September 23, 2009
AutoIt/Renocide 5/10 0 December 3, 2010
AutoRun.AEC 9/10 0 January 15, 2010
Av.exe March 8, 2010
Backdoor.Agobot.lo 8/10 0 July 24, 2009
Backdoor.Agobot.s 8/10 0 July 24, 2009
Backdoor.Agobot.wk 8/10 0 July 24, 2009
Backdoor.Agobot.y 8/10 0 July 24, 2009
Backdoor.Poebot.AL 8/10 0 November 26, 2010
Backdoor.SpyBoter December 9, 2009
BD.Raptra December 2, 2009
Bizex January 9, 2012
Blackout December 29, 2010
Bloodhound.W32.1 9/10 29 December 4, 2009
Bofra.A 9/10 0 August 17, 2007
BOO/Whistler.A 5/10 2 October 31, 2011
Brambul May 9, 2019
BrowserModifier.SearchV 2/10 0 December 24, 2009
Code Red Worm December 11, 2019
Conficker 9/10 13 January 27, 2009
Conficker A/B May 31, 2010
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