The virus described changes its own code with each execution but still performs the same actions. This is the hallmark of a Metamorphic Virus. Unlike polymorphic viruses (which use encrypted code with a changing decryptor), metamorphic viruses rewrite their own code entirely - including their decryption and execution routines - to avoid pattern detection by antivirus software.
Key characteristics of metamorphic viruses seen in the scenario:
Mutates completely on every execution.
Keeps overall functionality identical (semantics intact).
Alters its appearance and logic flow.
From CEH v13 Courseware:
Module 6: Malware Threats # Types of Viruses and Obfuscation Techniques CEH v13 Study Guide states:
"Metamorphic viruses modify their own code structure and appearance with each iteration, without altering their underlying behavior. This makes them more difficult to detect through signature-based mechanisms." Incorrect Options:
A: Polymorphic viruses encrypt themselves with a changing decryptor stub but do not change their core logic.
C: "Dravidic Virus" is not a recognized term in cybersecurity.
D: Stealth viruses hide their presence (e.g., by intercepting system calls), but do not change their code structure.
Reference:CEH v13 Study Guide - Module 6: Malware Types # Metamorphic and Polymorphic VirusesNIST SP 800-83r1 - Guide to Malware Incident Prevention and Handling Let me know if you'd like to continue with more malware-related questions or other CEH topics.