What is a Worm Virus

A computer worm is a standalone malware computer program that replicates itself in order to spread to other computers. Often, it uses a computer network to spread itself, relying on security failures on the target computer to access it.

A worm is a form of virus that is able to replicate itself between machines on a network. For example, a worm will find its way onto one system and then exploit known security holes to propagate copies of itself to any other systems it can find. Because worms replicate so effectively they can be difficult to eradicate. After the worm has been removed from a system on a network it is simply replaced by the in instance of the worm on another system on the network.

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