purple-team-exercise

name	purple-team-exercise
description	Plan and run a purple-team exercise: collaboratively emulate specific ATT&CK techniques and measure whether detection and response actually work, then close the gaps. Use to validate defensive coverage against real adversary behavior. Authorized environments only.

Goal

Measured evidence of which adversary techniques your defenses detect and respond to — and a prioritized set of fixes — produced collaboratively (red emulates, blue observes) rather than as a pass/fail contest.

Steps

1. Scope & objectives — pick techniques to test, driven by threat relevance (threat-intelligence:threat-actor-profiling) and known coverage gaps (detection-engineering:detection-coverage-review). Define success criteria.
2. Plan emulation — map each technique to a concrete, safe emulation (e.g. Atomic Red Team / a known procedure). Confirm authorization, scope, and a rollback plan; coordinate timing with the defenders.
3. Execute collaboratively — run each technique; record for each: was telemetry generated? did a detection fire? did an alert reach an analyst? was response timely and correct? Capture timestamps.
4. Score — per technique: Detected / Partially / Missed, plus prevention and response outcomes. Identify whether gaps are data-source, detection, or process.
5. Remediate — turn misses into detections (detection-engineering:detection-rule-development), data-source onboarding, or runbook fixes; re-test to confirm closure.

Output

A results matrix: technique (ATT&CK) · emulation · telemetry? · detected? · responded? · gap type · fix · retest status. Visualize as an ATT&CK heatmap (security-diagramming) and report with security-reporting.

Notes

Purple teaming is collaborative measurement, not a competition — the win is closed gaps, not "red won." Keep emulations safe, authorized, and reversible. Re-test after fixes; an untested fix isn't a closed gap.