The Importance of Purple Teaming in Cyber Security

With cyber threats evolving and demand growing for techniques to combat them, modern security teams are increasingly adopting Purple Teaming to combine offensive and defensive capabilities (Red Team and Blue Team), and test security controls against realistic attack scenarios.

To keep it simple: Purple Teaming brings together the Red Team (responsible for offensive security) and the Blue Team (responsible for defence, detection and response).

Rather than operating in isolation, the two teams work together to identify weaknesses, validate security controls, share technical knowledge and improve the organisation’s ability to detect and respond to threats.

Red Teams emulate real-world adversaries by using the tactics, techniques and procedures (TTPs) associated with genuine threat actors. Their role is to challenge an organisation’s security controls and uncover weaknesses that could be exploited during an attack.

On the other hand, Blue Teams focus on detecting, investigating and responding to those activities. This typically involves technologies and processes such as Security Information and Event Management (SIEM), Endpoint Detection and Response (EDR), Security Operations Centres (SOCs), threat hunting and incident response.

Purple Teaming connects these capabilities through a continuous feedback loop. Instead of simply reporting what went wrong after an exercise, teams can work together to understand why an attack was or was not detected, what controls performed as expected, and what needs to change. The result? A highly measurable, repeatable approach to improving security.

The value of Purple Teaming comes from closing the gap between offensive security testing and defensive security operations. In a traditional assessment, a Red Team may conduct an attack simulation and provide its findings at the end of the engagement. While this can provide valuable insight, Purple Teaming introduces collaboration throughout the exercise.

For example, a Red Team may execute a simulated attack technique while the Blue Team monitors its security controls. Together, they can determine:

• Whether the activity generated an alert.
• Which telemetry was available to security analysts.
• Whether the alert contained enough information to support an investigation.
• How quickly the activity was detected.
• Whether analysts followed the appropriate response process.
• Which security controls could be strengthened.
• Whether additional detection or response logic is required.

This creates a practical cycle of attack, detect, investigate, improve and retest. Moreover, the key benefits of Purple Teaming include improved incident detection and response, stronger threat intelligence, refined defensive engineering and ongoing skill development and learning.

Red and Blue Teams tend to be viewed as opposing forces, with one trying to breach and the other trying to defend. Purple Teaming replaces this rivalry with partnership.

By combining offensive security testing with defensive cyber security expertise, organisations can turn real-world attack insights into practical improvements across people, processes and technology. For mature security teams, regular Purple Teaming provides a structured approach to strengthening the overall cyber security posture, improving resilience against emerging threats and fostering a culture of continuous security improvement.