Which term describes a backdoor created by a malicious program that deceives users?

• A. Trojan Horse
• B. Worm
• C. Virus
• D. DDoS

Answer: (A)

Trojan Horse describes malware that hides its true purpose behind a deceptive appearance. It tricks the user into running what looks like legitimate or useful software, but once executed it installs a backdoor that gives an attacker covert access or control over the system. This blend of social engineering and hidden access is what makes a Trojan distinct from other malware. Viruses and worms focus on replication or spread, not on quietly opening a backdoor, and DDoS refers to a type of attack that overwhelms targets rather than providing backdoor access. So, when a backdoor is created by a malicious program that deceives users, it’s a Trojan Horse.