Definition: A worm is a program or script that replicates itself and moves through a network, typically travelling by sending new copies of itself via email. Most of today's worms use Microsoft Outlook scripting to email themselves as attachments either to all address book entries or as replies to incoming messages.
Many worms have no negative effect except resource consumption, but some will perform malicious actions. Prominent worms include Nimda, Worm.ExploreZip and LoveLetter.VBS.
How Does the Nimda Worm Work?
Find out how Nimda can be executed by just opening an email, and how you can secure your computer from that threat.
How Worms Spread via Email
If you know how worms can abuse your system you have better chances to avoid that.
Protect Your System Against Worms
Protect your system against attacks by worms using scripting languages.
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Protect your system with guide Mary Landesman.