What is a malicious program that affects the users from its true intent?

Appeared in: UPRVUNL - 2021

Explanation

A Trojan horse is a type of malicious software that misleads users about its true purpose, which directly matches the question's description.
It is named after the ancient Greek story of the wooden horse used to invade the city of Troy by stealth.
The primary mechanism of a Trojan is deception; it relies on a user willingly running the program because they believe it is something benign or useful.
Unlike viruses and worms, Trojans do not replicate themselves. Their goal is to perform a specific malicious action once executed by the user.

Option A: A computer worm is incorrect because its defining characteristic is self-replication and spreading across networks, often without any user interaction. It does not primarily rely on deceiving the user about its intent.
Option C: A virus is incorrect because its main feature is attaching itself to a host program or file. It spreads when the infected file is shared and executed. While it is malicious, its defining action is parasitic replication, not deception.
Option D: Malware (malicious software) is a general, umbrella term that includes Trojans, viruses, worms, spyware, and ransomware. While a Trojan horse is a type of malware, the term 'Trojan horse' is a more specific and precise answer to the question.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Types of Malicious Software (Malware) as background academic context rather than a clinical decision trigger.
In a healthcare setting, understanding cybersecurity threats like Trojans is critical for protecting sensitive Electronic Health Records (EHR) and patient data.
A nurse or hospital administrator clicking on a malicious email attachment (a Trojan) could compromise the entire hospital network, leading to data breaches, ransomware attacks, and disruption of patient care.
Nurses must be trained to recognize phishing emails and suspicious downloads to prevent inadvertently installing malware that could steal patient information or lock down critical systems.

How to Approach the Question

First, analyze the question to identify the core concept. The key phrase is 'affects the users from its true intent,' which points to deception or disguise.
Evaluate each option based on this core concept.
A 'computer worm' is primarily about self-replication.
A 'virus' is about attaching to a host file.
A 'Trojan horse' is specifically about disguising its malicious nature as something harmless. This is a direct match.
'Malware' is a general category. When a specific option (Trojan horse) perfectly describes the scenario, it is a better choice than a general term.

Concept Tested & Keywords

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Practise the full UPRVUNL - 2021

Attempt every question from this paper in a timed mock, then review the full solution for each one.