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operationalizing-misp-threat-feeds

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Stand up MISP, enable and cache curated threat feeds (CIRCL, abuse.ch, Feodo Tracker), apply warninglists to suppress false positives, query indicators with PyMISP, and export attributes as auto-generated Suricata/Sigma/Wazuh detection rules. Use when maturing a MISP instance to actively drive detection, curating threat feeds with quality controls, or automating IOC-to-detection pipelines for the SIEM/IDS.

skills/operationalizing-misp-threat-feeds/SKILL.md

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# Operationalizing MISP Threat Feeds

> **Note:** This skill covers a defensive threat-intelligence platform. Handle ingested intelligence according to its Traffic Light Protocol (TLP) marking and your sharing agreements. Treat ingested IOCs as potentially sensitive.

## Overview

MISP (Malware Information Sharing Platform) is the de-facto open-source threat-intelligence platform for storing, correlating, and sharing structured indicators (IOCs), events, galaxies (threat-actor/technique knowledge), and objects. Running a MISP instance is only the first step; the value comes from *operationalizing* it — curating high-quality feeds, suppressing false positives with warninglists, and pushing the resulting IOCs into detection tooling so intelligence actually drives blocking and alerting.

A feed in MISP is a remote source (another MISP, a CSV/freetext list, or a structured collection) that you **enable** and optionally **cache**. Caching pulls the feed's IOCs into the instance's Redis-backed cache so values can be correlated and looked up in real time (e.g., a SIEM asking "have you seen this domain?") without importing every event. Curation matters: enabling every public feed produces noise and false positives, so you select reputable feeds (CIRCL OSINT, abuse.ch, Feodo Tracker, etc.), apply **warninglists** (known-good ranges like RFC1918, Alexa/Tranco top sites, public DNS resolvers) to flag non-actionable indicators, and use taxonomies/tags (TLP, confidence) to scope what gets exported.

The detection-engineering payoff comes from MISP's export formats and PyMISP. MISP can render matching attributes directly as **Suricata** and **Snort** rules via the REST API, and PyMISP lets you script extraction of fresh IOCs to generate **Sigma** rules and **Wazuh** CDB lists / rules on a schedule. This skill walks the full lifecycle: feed enablement and caching, warninglist-based FP reduction, PyMISP-driven search, and automated generation of Suricata, Sigma, and Wazuh detections.

## When to Use

- Standing up or maturing a MISP instance into a feed that drives detection, not just a repository.
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