Self-replicating malware that spreads automatically across networks without requiring user action.
A worm is self-replicating malware that spreads across networks without user interaction—unlike viruses that require running infected files. Worms exploit network vulnerabilities to propagate, potentially infecting thousands of systems within hours. Notable worms include WannaCry, NotPetya, and SQL Slammer. Worms can cause massive damage through rapid spread and often carry additional payloads (ransomware, backdoors). Network segmentation and prompt patching are key defences against worm propagation.
Why It Matters
The DSC Perspective:
Worms spread rapidly without user action, making them particularly dangerous. Patching and network segmentation limit worm spread. WannaCry showed how devastating worm-enabled ransomware can be.