- A theoretical collection of techniques and methods for creating or evolving polymorphic malware. Manual or a set of guidelines used by malware developers to build new, more evasive strains of malware.
- A resource that explains the various polymorphic techniques. How malware authors achieve code mutation, encryption, and other evasion tactics.
- A fictional or informal term used to describe the sophisticated methods employed by threat actors to make their malware "shape-shift" and bypass security measures.