Information Technology Specialist (ITS) Cybersecurity Practice Exam 2026 - Free Cybersecurity Practice Questions and Study Guide

A program that is designed to appear useful or harmless while containing hidden malicious code is classified as a Trojan horse. This type of malware masquerades as a legitimate application to deceive users into downloading and executing it. Unlike traditional viruses or worms, which self-replicate or spread across systems, a Trojan horse relies on user interaction to install the malware. Once executed, it can perform a range of harmful actions, such as stealing sensitive data, installing additional malicious software, or creating backdoors for future access.

In contrast, viruses attach themselves to legitimate programs or files and replicate themselves, while worms can spread independently across networks without user intervention. Adware, on the other hand, typically displays unsolicited advertisements, but it's not inherently malicious in the way that a Trojan horse is, as it does not necessarily hide harmful code. Understanding these distinctions is crucial for recognizing the behavior of different types of malware and protecting systems from potential threats.