Worms are passed on to the targeted system through software vulnerabilities. Hackers send phishing emails or instant messages with malicious attachments. When the user opens the attachment or the link, it instantly downloads the malware (worm) into the system or gets directed to malicious website.
So, how do viruses and worms work?
A computer worm is a standalone malware computer program that replicates itself in order to spread to other computers. 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.
Beside above, what damage can a worm virus do?
Worms cause damage similar to viruses, exploiting holes in security software and potentially stealing sensitive information, corrupting files and installing a back door for remote access to the system, among other issues.
What is the main difference between worm and virus?
Virus vs Worm The primary difference between a virus and a worm is that viruses must be triggered by the activation of their host; whereas worms are stand-alone malicious programs that can self-replicate and propagate independently as soon as they have breached the system.
How does a worm virus spread?
One of the most common ways for computer worms to spread is via email spam. Once a machine has been infected, the worm may replicate itself by emailing itself to everyone in your address book or automatically replying to emails in your inbox.