Explain any five types of malware commonly used by cybercriminals. Give the…

Concept

Malware is software or code intentionally designed to perform unauthorized or harmful actions that affect the confidentiality, integrity, or availability of a system or its data.

Malware types are distinguished mainly by how they enter or spread, what they do, and how they maintain access or evade detection.

Application

• Ransomware: Malware that blocks access to data or systems, commonly by encrypting files, and demands payment for restoration. Key characteristic: Its defining behavior is deliberate denial of access, often combined with a ransom demand.

• Computer worm: A standalone malicious program that copies itself and spreads to other systems, usually through a network. Key characteristic: It can propagate without attaching itself to another program or requiring the user to run an infected file.

• Trojan horse: A malicious program presented as useful or legitimate software so that a user is persuaded to install or run it. Key characteristic: Its defining feature is deceptive appearance rather than self-replication.

• Spyware: Malware installed covertly to collect information about a person or organization without authorization. Key characteristic: It secretly monitors or extracts data such as activity, credentials, or other sensitive information.

• Rootkit: A collection of malicious tools or files that alters normal system behavior to conceal an attacker or malicious activity. Key characteristic: It provides stealth and can help preserve covert, privileged access.

Cross-check

These five examples cover distinct behaviors: denial of access, autonomous spread, deceptive delivery, covert information collection, and stealthy persistence. Each therefore supplies both a valid malware definition and a different key characteristic.

Result: any five correctly defined malware types with one accurate distinguishing characteristic each satisfy the question; the five above form one complete answer.