Certified Ethical Hacker (CEH v11) — Question 381

What type of virus is most likely to remain undetected by antivirus software?

Answer options

• A. Cavity virus
• B. Macro virus
• C. Stealth virus
• D. File-extension virus

Correct answer: C

Explanation

The correct answer is C, the Stealth virus, as it is designed to evade detection by concealing its presence and actions from antivirus software. In contrast, the other types of viruses, such as Macro and File-extension viruses, have more identifiable characteristics that can be detected by traditional antivirus solutions.