Multiple Choice Questions on Viruses, Worms, Trojans, and Ransomware

📚 Quick Study Guide: Understanding Malware

• 🦠 Viruses: Malicious code that attaches itself to legitimate programs or documents. It requires user interaction (like opening an infected file) to execute and spread, often corrupting data or slowing system performance.
• 🐛 Worms: Self-replicating malware that spreads autonomously across networks without needing to attach to a host program or user interaction. Worms consume network bandwidth and can severely disrupt operations.
• 🐴 Trojans (Trojan Horses): Malware disguised as legitimate software. Users unknowingly install them, granting attackers access to steal data, create backdoors, or deploy other malicious payloads. Unlike viruses and worms, Trojans do NOT self-replicate.
• 🔒 Ransomware: A type of malware that encrypts a victim's files, making them inaccessible. Attackers then demand a ransom (usually cryptocurrency) in exchange for the decryption key.
• 🚨 Key Distinctions: Viruses need a host and user action to spread; Worms are self-contained and self-propagating; Trojans rely on deception and user installation; Ransomware focuses on extortion by encrypting data.
• 🛡️ Prevention: Regular software updates, strong antivirus, firewalls, cautious email practices, and frequent data backups are crucial for protection against all these threats.

🧠 Practice Quiz: Test Your Malware Knowledge

1. Which type of malware requires a host program and user interaction to spread?

   1. Worm
   2. Virus
   3. Trojan Horse
   4. Ransomware

2. What characteristic best describes a 'worm'?

   1. It encrypts files and demands payment.
   2. It disguises itself as legitimate software.
   3. It self-replicates and spreads independently across networks.
   4. It requires a host file to execute.

3. A user downloads a free game, but it secretly installs a backdoor on their computer, allowing remote access to an attacker. What type of malware is this most likely to be?

   1. Virus
   2. Worm
   3. Ransomware
   4. Trojan Horse

4. Which malware aims to deny access to a user's files until a payment is made?

   1. Worm
   2. Trojan Horse
   3. Ransomware
   4. Virus

5. What is a key difference between a virus and a worm?

   1. A virus encrypts files, while a worm steals data.
   2. A virus self-replicates, while a worm needs user action.
   3. A virus requires a host program, while a worm is self-contained and self-propagating.
   4. A virus creates backdoors, while a worm displays unwanted ads.

6. Which of the following is NOT a primary characteristic of a Trojan Horse?

   1. It disguises itself as legitimate software.
   2. It performs malicious actions after installation.
   3. It primarily spreads by self-replication across networks.
   4. It relies on user deception for installation.

7. A cyberattack floods a network with traffic, consuming bandwidth and making services unavailable. This is most characteristic of an attack caused by which malware?

   1. Ransomware
   2. Trojan Horse
   3. Virus
   4. Worm