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Kestrel  /  Detection & Response
MOD-DET · § 04

Detection & Response

Running attacks is half the value; what your blue team learns is the other half. Kestrel turns each technique into a controlled experiment for your SOC.

§ A — OVERVIEW

Every action is a detection test

Running attacks is only half the value. The other half is what your blue team learns. Kestrel treats each technique as a controlled experiment for your SOC: did the alert fire, did the log land, did anyone respond?

Pairing offensive actions with detection outcomes turns a red-team exercise into a purple-team feedback loop — tuning detections against real behavior instead of guesswork.

  • Per-action verdicts. See detected, partially detected, or missed for every single technique you run.
  • Detection tuning. Feed results straight back into your SIEM and EDR rules, then re-test to confirm the fix.
  • Time-to-detect. Measure how long each action stayed invisible, not just whether it was eventually caught.
§ B — THE SCORECARD

A verdict for every technique.

The exact output your detection team works from after an operation.

detection scorecard · operation "Nightfall"
T1595 active scanning · detected 142ms
T1078 valid accounts · detected 210ms
T1059 command execution · detected 88ms
T1547 persistence · partial — no alert, log only
T1021 lateral movement · detected 1.4s
T1041 exfiltration · missed — no signal
# 4 detected · 1 partial · 1 gap · MTTD 0.4s
§ C — THE LOOP

Offense and defense on one scorecard.

SIEM

Signal correlation

Line up emulated actions against the alerts and logs your platforms actually produced.

PURPLE

Feedback loop

Close the gap between offense and defense with a shared, evidence-based scorecard.

MTTD

Measured detection

Track mean time to detect as a metric that improves operation over operation.

Get started

Find out what your defenses miss.

Run an operation and get a per-technique detection scorecard — with the gaps and the slow alerts marked.