Metamorphic malware

Metamorphic malware is malware of which each iteration or instance has different code from the preceding one. The code changes make it difficult to recognize the different iterations are the same malware (contrast with polymorphic malware).

Definitions

According to the CyBOK (version 1),

Metamorphic malware. Malware of which each iteration or instance has different code from the preceding one. The code changes make it difficult to recognize the different iterations are the same malware (contrast with polymorphic malware).