Worms

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 965 articles listed on worms.

Name Threat Level Detection Count Date
Conficker A/B May 31, 2010
Conficker B++ 55/10 284 February 21, 2009
Conficker.C 55/10 79 March 25, 2009
Conficker.e March 8, 2009
Corrupt-EP July 23, 2010
CrazyCoin March 20, 2020
Cridex-B 88/10 18 February 7, 2012
DMSetUp December 28, 2008
Dorkbot 55/10 1,561 November 27, 2012
Downadup January 27, 2009
Email-Worm.Abotus!sd5 August 27, 2010
Email-Worm.Ackantta May 27, 2010
Email-Worm.Ackantta!rem June 3, 2011
Email-Worm.Agent.l 66/10 0 September 28, 2007
Email-Worm.Beagle June 2, 2010
Email-Worm.Bobax 99/10 0 June 18, 2010
Email-Worm.Bugbear.b 99/10 0 November 30, 2007
Email-Worm.Chir 77/10 0 September 16, 2010
Email-Worm.Erkez.D 99/10 0 October 12, 2007
Email-Worm.Erkez.F 99/10 0 October 12, 2007
Email-Worm.Evaman.a 99/10 0 August 17, 2007
Email-Worm.Mydoom.B!rem May 27, 2011
Email-Worm.Mytob 99/10 498 June 28, 2010
Email-Worm.Nyxem April 23, 2010
Email-Worm.Pacrac 99/10 0 January 18, 2008
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