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engineering-detections

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Build, test, and tune detection content — Sigma, YARA, Suricata, and EDR/SIEM queries — mapped to MITRE ATT&CK with explicit false-positive analysis and detection-as-code practices. Use when writing or reviewing a detection rule, converting IOCs or TTPs into alerts, measuring detection coverage, or reducing alert fatigue.

secskills-defense/skills/engineering-detections/SKILL.md

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# Engineering Detections

A detection is a hypothesis about attacker behaviour, expressed as a query,
that a human will be paged for. Two properties decide whether it is worth
deploying: does it fire on the behaviour, and does it stay quiet otherwise.
Most rules fail the second test, and the cost is paid by whoever is on call.

## When to Use

- Writing a new detection rule from a TTP, a sample, or an incident
- Reviewing or tuning an existing rule that is noisy or silent
- Converting threat intelligence into deployable detection content
- Assessing detection coverage against ATT&CK
- Setting up detection-as-code: repo layout, testing, CI, deployment
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