Which example of malicious code would be classified as a Trojan horse?

Question:
Which example of malicious code would be classified as a Trojan horse?

• malware that was written to look like a video game
• malware that requires manual user intervention to spread between systems
• malware that attaches itself to a legitimate program and spreads to other programs when launched
• malware that can automatically spread from one system to another by exploiting a vulnerability in the target

Explanation: A Trojan horse is malicious code that has been written specifically to look like a legitimate program. This is in contrast to a virus, which simply attaches itself to an actual legitimate program. Viruses require manual intervention from a user to spread from one system to another, while a worm is able to spread automatically between systems by exploiting vulnerabilities on those devices.

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