What is the primary purpose of a Trojan?

What is the primary purpose of a Trojan?

• A. To provide backdoor access to an unauthorized user
• B. To propagate automatically across a network
• C. To scan for vulnerabilities
• D. To automatically update software

Answer: (A)

Trojans are designed to deceive by appearing harmless, often hiding inside a legitimate-looking program. Once a user runs them, their main goal is to give the attacker covert access by installing a backdoor or remote-control capability. This backdoor allows the attacker to issue commands, access data, or install additional malicious components while the user remains unaware. They don’t spread automatically across a network like worms do, so propagation isn’t their primary function. Nor do Trojans inherently scan for vulnerabilities or automatically update software—that behavior is associated with vulnerability scanners or legitimate updater mechanisms, not with the core purpose of a Trojan.

Trojans are designed to deceive by appearing harmless, often hiding inside a legitimate-looking program. Once a user runs them, their main goal is to give the attacker covert access by installing a backdoor or remote-control capability. This backdoor allows the attacker to issue commands, access data, or install additional malicious components while the user remains unaware.

They don’t spread automatically across a network like worms do, so propagation isn’t their primary function. Nor do Trojans inherently scan for vulnerabilities or automatically update software—that behavior is associated with vulnerability scanners or legitimate updater mechanisms, not with the core purpose of a Trojan.