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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.
This is an accepted version of this page This is the latest accepted revision, reviewed on 30 December 2024. Computer program that modifies other programs to replicate itself and spread Hex dump of the Brain virus, generally regarded as the first computer virus for the IBM Personal Computer (IBM PC) and compatibles A computer virus is a type of malware that, when executed, replicates itself by ...
Virus & worms: Attacks through the internet, emails or contaminated files, then automatically replicates itself. Viruses require human action to spread to other computers, whereas worms spread by ...
By the time the virus is identified, many names have been used to denote the same virus. Ambiguity in virus naming arises when a newly identified virus is later found to be a variant of an existing one, often resulting in renaming. For example, the second variation of the Sobig worm was initially called "Palyh" but later renamed "Sobig.b ...
The worm was most notable for performing a distributed denial-of-service (DDoS) attack on www.sco.com, which belonged to The SCO Group. February 16: The Netsky worm is discovered. The worm spreads by email and by copying itself to folders on the local hard drive as well as on mapped network drives if available. Many variants of the Netsky worm ...
Trojan worm February 14, 2006 Most known for being the first virus targeting Mac computers. Morris: November 2, 1988 Robert Tappan Morris: Widely considered to be the first computer worm. Although created for academic purposes, the negligence of the author unintentionally caused the worm to act as a denial of service attack.
According to a survey conducted by BitDefender from January to June 2009, "Trojan-type malware is on the rise, accounting for 83% of the global malware detected in the world." Trojans have a relationship with worms, as they spread with the help given by worms and travel across the internet with them. [14]
An indication of the worm's infection of a given PC is the existence of the files C:\win.log, C:\win2.log or C:\WINDOWS\avserve2.exe on the PC's hard disk, the ftp.exe running randomly and 100% CPU usage, as well as seemingly random crashes with LSA Shell (Export Version) caused by faulty code used in the worm. The most characteristic symptom ...