<!-- Copyright (c) 2026 defconxt. All rights reserved. -->
<!-- Licensed under AGPL-3.0 — see LICENSE file for details. -->
---
name: building-detection-as-code-frameworks
description: >-
  Design and implement detection-as-code (DaC) pipelines including
  version-controlled rule repositories, CI/CD validation, automated
  testing, and SIEM deployment workflows.
domain: cybersecurity
subdomain: detection-engineering
tags:
  - detection-as-code
  - ci-cd
  - version-control
  - automation
  - pipeline
  - deployment
version: "1.0"
author: defconxt
license: AGPL-3.0
metadata:
  mitre-attack: []
---

# Building Detection as Code Frameworks

## Overview

Detection-as-code applies software engineering practices to detection
rule management. Rules are version-controlled, peer-reviewed, validated
automatically, and deployed through CI/CD pipelines.

## Prerequisites

| Requirement | Purpose |
|---|---|
| Git repository | Version control for detection rules |
| CI/CD platform | GitHub Actions, GitLab CI, or Jenkins |
| Sigma CLI | Automated rule validation |

## Key Concepts

### DaC Repository Structure

```python
repo_structure = {
    "rules/": {
        "credential_access/": ["lsass_access.yml", "kerberoasting.yml"],
        "execution/": ["office_macro.yml", "powershell_download.yml"],
        "persistence/": ["scheduled_task.yml", "registry_run_key.yml"],
    },
    "tests/": {"test_rules.py": "Validation tests", "test_coverage.py": "ATT&CK coverage"},
    "pipelines/": {"validate.yml": "CI validation", "deploy.yml": "CD deployment"},
}
```

## Workflow

1. **Design repository** — Structure by ATT&CK tactic
2. **Configure CI** — Automated sigma check on every PR
3. **Add quality gates** — Required fields, tags, FP docs
4. **Build deployment** — Automated conversion and SIEM push
5. **Enable peer review** — Required reviews with detection checklist
6. **Track deployments** — Audit trail of changes
7. **Measure pipeline health** — CI pass rate, deploy frequency

## Verification

| Check | Method |
|---|---|
| Workflow completed | All steps executed and documented |
| Output validated | Results match expected format and content |
| Quality assured | Peer review or automated validation passed |

## References

- [NIST Cybersecurity Framework](https://www.nist.gov/cyberframework)
- [MITRE ATT&CK](https://attack.mitre.org/)
