DataStructures / Cyber Security Interview Questions
What are the common types of Malware?
Malware is usually classified by how it spreads and what it does once installed.
| Type | Behavior |
| Virus | Attaches itself to a legitimate file and spreads when that file runs |
| Worm | Self-replicates across a network without needing a host file |
| Trojan | Disguises itself as legitimate software to trick users into installing it |
| Ransomware | Encrypts files and demands payment for the decryption key |
| Spyware | Secretly monitors user activity and collects data |
| Rootkit | Hides deep in the operating system to maintain persistent, privileged access |
Knowing the category helps responders choose the right containment strategy, since a self-spreading worm needs a very different response than a trojan sitting on one machine.
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