Which of the following is a malware?
(A) Virus
(B) Worms
(C) Ransomware
(D) Trojan

Choose the correct answer from the options given below:

Correct option is C

Malware (malicious software) is any software intentionally designed to cause damage to a computer, server, client, or computer network. The following are common types of malware:
• Virus (A): A virus is a malicious program that attaches itself to legitimate software and spreads to other programs and files.
• Worms (B): A worm is a self-replicating malware that spreads across networks without the need for human intervention.
• Ransomware (C): Ransomware encrypts the victim's data and demands a ransom payment to unlock it.
• Trojan (D): A Trojan is a type of malware that tricks the user into installing it, often appearing as a legitimate file, but then causes damage or steals information.
Hence, all the listed options (A), (B), (C) and (D) are types of malware. Therefore, the correct answer is (c): (A), (B), (C) and (D).
Information Booster:
1. Virus: Requires a host program to replicate and spread. Can corrupt files and disrupt computer operations.
2. Worm: Spreads through networks by exploiting vulnerabilities, often without requiring any user interaction.
3. Ransomware: Encrypts files and demands ransom payment, usually in cryptocurrency, to unlock the data.
4. Trojan: Disguises itself as legitimate software to trick users into installing it, allowing attackers to gain unauthorized access.
Additional Knowledge:
• Antivirus software: To protect against these types of malware, antivirus software can detect and remove viruses, worms, Trojans and ransomware.
• Phishing: One of the common methods to deliver Trojans and ransomware is through phishing emails.