Malware
Metamorphic Malware
Also known as: Self-rewriting malware, Code-morphing malware
Definition
Malware that fully rewrites its own code on each propagation, producing semantically equivalent but structurally different binaries.
Examples
- W32/Simile (Etap), a research-grade metamorphic virus.
- ZMist (Zmorph) by Z0mbie, an early demonstration of code transposition.
Related terms
Polymorphic Malware
Malware that changes its on-disk appearance — typically via re-encryption or packing — for each infection, while keeping its core logic intact.
Stealth Malware
Malware specifically engineered to evade detection by users, security tools, and forensic investigators through hiding, mimicry, and anti-analysis tricks.
Computer Virus
Malicious code that inserts copies of itself into other programs or files and executes when the host is run.
Malware Analysis
Malware Analysis — definition coming soon.
Reverse Engineering
Reverse Engineering — definition coming soon.
Malware
Any software intentionally designed to disrupt, damage, or gain unauthorized access to computers, networks, or data.