A worm virus is a type of malware that spreads through computer networks by replicating itself and infecting other computers. It can be transmitted via email attachments, malicious websites, or USB drives. Unlike a computer virus, a worm virus does not need to attach itself to a host file. Instead, it exploits vulnerabilities in software or operating systems to spread.
Worm viruses can cause severe damage to computer systems, including data loss, system crashes, and network outages. They can also be used to launch other attacks, such as phishing scams or ransomware attacks. Notable examples of worm viruses include the Morris worm, the Code Red worm, and the SQL Slammer worm.