Purple Team: Evolution Toward a Modern and Effective Cyber Defense

In companies with advanced cybersecurity programs, it is very common to find formal Red and Blue Team structures. On one hand, Red Teams operate offensively. They emulate real adversary tactics, techniques, and procedures to determine how an attacker could move through an organization’s environment—essentially identifying where defensive controls might fail. On the other hand, Blue Teams represent operational defense. They are responsible for monitoring, detecting, and responding to threats using solutions such as SIEM, EDR/XDR, detection engineering, threat hunting, and technical intelligence. Their goal is to form the foundation of the modern SOC.

However, this is where the main problem emerges. Red and Blue Teams still operate disconnected from each other. As a result, more and more companies are adopting the Purple Team model. This approach merges the Red Team’s offensive work with the Blue Team’s defensive capabilities, creating a continuous cycle of validation, learning, and detection improvement. Let’s break it down in detail.

The Lack of Coordination Between Red and Blue Teams

As noted earlier, the main issue between Red and Blue Teams is the lack of coordination that exists between them. This disconnect leads to discrepancies when identifying threats and generating an effective response. It also creates several consequences for the organization’s defensive posture:

• The teams work with different priorities and lack a shared vision.
• The Blue Team implements defenses based on assumptions, while the Red Team simulates attacks without coordinated feedback.
• Detections remain unvalidated.
• The Red Team generates reports that do not translate into actionable improvements.
• As a result, the organization lacks a robust cybersecurity strategy.

Solving the Disconnect: Purple Team

A Purple Team should be implemented as a continuous practice, not as a one‑off activity. This is achieved through iterative work based on MITRE ATT&CK, where each simulated offensive technique becomes a direct opportunity to strengthen detections and refine defensive controls.

The immediate feedback loop between both teams enables real-time review and enhancement of SIEM and EDR rules. It also ensures that defenses genuinely respond to real adversary behaviors.

Furthermore, this ongoing practice allows teams to validate controls ahead of external audits and optimize SOC capabilities. In this way, the Purple Team becomes the engine of continuous improvement that aligns the entire organization around a truly effective cyber defense.

How to Integrate the Purple Team into the Modern SOC

Once the value of the Purple Team is understood, the next step is integrating it into the modern SOC. To achieve this, it is essential to apply the following principles:

• Turn offensive exercises into continuous operational inputs. Red Team simulations must become working material for detection engineering, alert design, and response. This enables rule tuning, hypothesis validation, and strengthening the SOC with insights based on real attack behavior.
• Align threat hunting with real TTPs. Each validated technique translates into more precise hunts and better‑supported hypotheses. Threat hunting stops being theoretical and becomes directly connected to proven adversary behaviors.
• Transform Red Team findings into immediate improvements. Real-time feedback reduces MTTR, sharpens rules, eliminates false positives, and ensures defenses evolve at the pace of threats.
• Activate the continuous validation required by modern frameworks. Frequent, iterative, MITRE ATT&CK–based tests ensure controls work before external audits.
• Prepare the SOC for XDR and SOAR automation. The Purple cycle provides the evidence needed to run effective, automatable playbooks based on real environmental data.
• Reduce operational noise and optimize resources. Continuous validation allows teams to discard low-value alerts and focus on what truly matters.

Purple Team Maturity Model: Measuring and Validating Effectiveness

The Purple Team Maturity Model (PTMM) is the mechanism that validates, organizes, and measures the functionality of the Purple Team within the modern SOC. It describes how organizations evolve from improvised exercises to fully integrated, continuously validated practices.

The PTMM consists of five maturity levels: Ad Hoc, Defined, Measured, Integrated, and Optimized. Let’s explore them:

• Ad Hoc. No formal process exists. The Red Team conducts isolated tests without Blue Team participation. Findings are neither documented nor integrated into the defensive cycle.
• Defined. Red and Blue Teams begin collaborating. Detection gaps slowly become part of detection engineering.
• Measured. The Purple Team evolves into a formal system with metrics and continuous learning, strengthening true detection capabilities.
• Integrated. Cyber defense becomes a continuous process. The Purple Team is fully embedded within SOC operations.
• Optimized. The final level. The organization can now both respond to and anticipate potential attacks.

The Purple Team Maturity Model is a strategic solution designed to prioritize investments, assess maturity, accelerate compliance efforts, and demonstrate real cybersecurity ROI.

Conclusion

Ultimately, the Purple Team is an essential element for any organization aspiring to a modern and effective SOC. Only through a continuous process of validation, learning, and improvement can today’s increasingly sophisticated threats be countered. Organizations that already operate under this model can detect sooner, respond better, and anticipate attacks with far greater precision.

Adopting this approach does not require starting from scratch: many companies already have tools such as Microsoft Defender, Sentinel, or Azure AD that allow them to implement these practices progressively. With the right technical support, it is entirely possible to evolve toward a stronger, more automated, and standards-aligned security model.

At Itequia, we support organizations on this journey, helping them make the most of their Microsoft environment to continuously enhance their cybersecurity posture. Do you want to learn more? Contact us.