Computer worm
Computer worm, by Wikipedia https://en.wikipedia.org/wiki?curid=6010 / CC BY SA 3.0
#Computer_worms
#Security_breaches
Hex dump of the Blaster worm, showing a message left for Microsoft CEO Bill Gates by the worm's creator Spread of Conficker worm A computer worm is a standalone malware computer program that replicates itself in order to spread to other computers.
It often uses a computer network to spread itself, relying on security failures on the target computer to access it.
It will use this machine as a host to scan and infect other computers.
When these new worm-invaded computers are controlled, the worm will continue to scan and infect other computers using these computers as hosts, and this behavior will continue.
Computer worms use recursive methods to copy themselves without host programs and distribute themselves based on the law of exponential growth, thus controlling and infecting more and more computers in a short time.
Worms almost always cause at least some harm to the network, even if only by consuming bandwidth, whereas viruses almost always corrupt or modify files on a targeted computer.
Many worms are designed only to spread, and do not attempt to change the systems they pass through.
However, as the Morris worm and Mydoom showed, even these "payload-free" worms can cause major disruption by increasing network traffic and other unintended effects.
Morris worm source code floppy diskette at the Computer History Museum The actual term "worm" was first used in John Brunner's 1975 novel, The Shockwave Rider.
In the novel, Nichlas Haflinger designs and sets off a data-gathering worm in an act of revenge against the powerful men who run a national electronic information web that induces mass conformity.
"You have the biggest-ever worm loose in the net, and it automatically sabotages any attempt to monitor it. There's never been a worm with that tough a head or that long a tail!" The first ever computer worm was devised to be an anti-virus software.
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