Purple Team

Definition

Purple teaming is a collaborative security exercise in which offensive (red team) and defensive (blue team) practitioners work together in real time, sharing techniques and detection outcomes to directly improve an organization's security posture.

Overview

In a traditional red team exercise, the Red Team attacks without the Blue Team's knowledge, and results are only shared in a report afterward. Purple teaming inverts this by design: red and blue operators work side by side during the exercise itself, with the red team explaining exactly what technique they're about to execute and the blue team immediately checking whether their tools and detection rules caught it. This tight feedback loop dramatically shortens the time between discovering a detection gap and closing it. Rather than waiting weeks for a post-engagement report, a purple team session might reveal within minutes that a particular attack technique goes completely unnoticed by the Security Information and Event Management (SIEM) platform, allowing the blue team to write and test a new detection rule immediately, then have the red team re-run the same technique to confirm it's now caught. Purple team exercises are often structured around a known framework of adversary tactics and techniques, systematically working through specific attack behaviors one at a time rather than running a single, opaque end-to-end attack scenario like a traditional red team engagement. This makes purple teaming particularly effective as a training exercise, since blue team analysts directly observe how a given attack technique looks in their own tools, building intuition that's hard to gain from documentation alone. Rather than being a separate, permanent team, "purple team" more often describes a collaborative methodology or a temporary function bringing red and blue practitioners together for a specific exercise, with the explicit goal of measurably improving detection coverage rather than simply testing it.

Key Concepts

• Red and blue teams collaborate in real time rather than working in isolation
• Provides immediate feedback on whether an attack technique was detected
• Dramatically shortens the gap between finding and fixing a detection weakness
• Often structured around a systematic framework of adversary techniques
• Functions as a highly effective hands-on training exercise for analysts
• Typically a collaborative methodology or temporary exercise, not a standing team

Use Cases

Frequently Asked Questions

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