Purple Teaming: A comprehensive and collaborative approach to cyber security

Abstract

This paper introduces Purple Teaming as a comprehensive and collaborative approach to cyber security, emphasising the need for organisations to adapt their cyber security testing methodologies in response to evolving cyber threats. Traditionally, cyber security efforts were divided into offensive (Red Team) and defensive (Blue Team) units; however, the concept of Purple Teaming has gained prominence, advocating for the integration of these units to create a dynamic and cooperative cyber security environment. The paper covers various topics including the significance of adversary emulation, the role of the MITRE ATT&CK framework in standardising communication, the value of traditional Red Team exercises and how Purple Teaming activities can complement these exercises. It differentiates between types of Purple Teaming activities and proposes an approach and architecture to support continuous Purple Teaming efforts. Adversary emulation, a key aspect of Purple Teaming, involves replicating the tactics, techniques and procedures (TTPs) of real-world threat actors to evaluate an organisation’s defences. The paper outlines how, when properly combined, Red and Purple Team efforts can significantly enhance an organisation’s capability to proactively improve its preventative, detection and response mechanisms against adversary tactics. Through its comprehensive coverage, the paper underscores the vital role of Purple Teaming in modern cyber security, highlighting its potential to foster a more resilient and proactive security posture for organisations.