What does the term 'polymorphic' specifically refer to in the context of computer viruses?

The term 'polymorphic' in the context of computer viruses specifically refers to a virus that has the ability to change its identifiable features, such as its code or signature, each time it infects a new system or replicates. This characteristic makes polymorphic viruses particularly challenging to detect using traditional signature-based antivirus tools, which rely on recognizing known patterns or signatures of malware. By altering its appearance, a polymorphic virus can evade detection and remain active in a system for longer periods, increasing its potential for damage and spread.

Understanding this concept is crucial in cybersecurity because it emphasizes the need for advanced detection methods. Instead of relying solely on known signatures, security solutions must employ heuristic analysis, behavior-based detection, or machine learning techniques to identify malicious activity that may involve polymorphic malware.