MISP Threat Intelligence Platform Guide

Why a Threat Intelligence Platform

Every incident teaches you something: the IPs the attacker used, the hashes they dropped, the domains they called home to. Without a place to store that knowledge in a structured, queryable form, it evaporates. The next time the same infrastructure is used against you, or against an organisation you could have warned, nobody connects the dots.

MISP exists to stop that evaporation. It is a structured store of indicators of compromise that can correlate across events and, crucially, share with other organisations. The premise of threat intelligence sharing is simple: attackers reuse infrastructure and tooling across many targets, so an indicator that burned one organisation is a free early warning for the next, if it is shared in time.

For a SOC, MISP plays two roles. It is the memory, the place your own observed indicators are recorded so future detections can match against history. And it is the antenna, the place external intelligence arrives through feeds and communities so you can detect threats you have not personally seen yet. Both roles feed directly into detection.

Events and Attributes

The core MISP data model is events and attributes. An event is the top-level container, typically representing a single incident, campaign or intelligence report. An event has an info field describing it, a date, a threat level, an analysis status and a distribution setting that governs who can see it.

Inside an event sit attributes, the individual indicators. Each attribute has a category (such as network activity, payload delivery or artifacts dropped), a type (ip-dst, md5, domain, url, email-src and many more) and a value. An attribute also carries an IDS flag that marks whether it is suitable for automated detection, a comment and its own distribution setting if it differs from the event.

Attributes can be grouped into objects, which bundle related attributes that describe one thing, such as a file object holding a filename, several hashes and a size together. Events, attributes and objects can all carry tags, including standardised taxonomies and galaxies that map indicators to threat actors and techniques, which is what lets MISP express not just what an indicator is but what it means.

Feeds: Importing Intelligence

A single organisation's own observations are a thin stream of intelligence. Feeds widen it dramatically. A feed is an external source of indicators that MISP pulls on a schedule and ingests as events and attributes, so your instance accumulates intelligence far beyond what you have personally seen.

MISP supports several feed types. Open feeds are freely available indicator lists published by the community and security vendors. Community feeds come from MISP sharing communities you have joined. Commercial feeds come from paid intelligence providers. Feeds can be previewed before ingestion and filtered, so you import what is relevant rather than everything.

Feed hygiene matters. Not every feed is high quality, and a noisy feed full of stale or false indicators will generate false positives downstream in your detection. Curate which feeds you trust, watch for indicators that cause repeated false hits, and use warninglists (MISP's lists of known-good values such as public DNS resolvers and major CDNs) to stop obviously benign infrastructure from ever being treated as malicious.

Distribution and Sharing Communities

MISP's sharing model is built on distribution levels. Each event and attribute has a distribution setting: your organisation only, this community, connected communities, or all. This granularity lets you record a sensitive internal indicator that never leaves your instance alongside an indicator you actively want to broadcast, within the same tool.

Sharing groups give finer control. Rather than the coarse built-in levels, a sharing group names exactly which organisations may see a given event, which is how sector communities (finance, healthcare, critical infrastructure) share among trusted members without exposing intelligence to the wider world. You join the communities relevant to your sector and geography and both contribute to and benefit from the pooled intelligence.

The cultural point is that sharing is reciprocal. A community where everyone consumes and nobody contributes starves. When your SOC confirms a malicious indicator in an investigation, pushing it back to the appropriate sharing group, with the right distribution level, is how the model sustains itself. The TLP (Traffic Light Protocol) taxonomy is the standard way to mark how widely a given piece of intelligence may be redistributed.

Integrating MISP With the SOC

MISP earns its keep through integration, and the integration runs in three directions. Outbound to detection: MISP exports indicators marked with the IDS flag in formats your SIEM and EDR consume, so the intelligence in MISP actively drives detection. A new malicious domain ingested from a feed becomes a detection rule in Wazuh or your SIEM with no manual retyping.

Inbound to enrichment: the Cortex MISP analyzer checks any observable in a TheHive case against your MISP instance, telling the analyst whether you have seen this indicator before and in what context. An observable that matches a recent MISP event is immediately more significant, and that context reaches the analyst inside the case.

Back to intelligence: when a TheHive case confirms new malicious indicators, they are pushed to MISP as a new event, where they strengthen detection and can be shared. This is the full loop of the open source SOC: feeds and communities populate MISP, MISP drives detection, detection produces cases, cases confirm indicators, and confirmed indicators flow back into MISP and out to the community. Intelligence that only sits in a platform is wasted; intelligence wired into detection and sharing compounds.

Operating MISP in Production

Run MISP with a few disciplines and it stays valuable. Curate feeds deliberately rather than enabling everything, because feed quality directly determines false-positive load downstream. Keep warninglists active so common benign infrastructure is never flagged. Periodically review which indicators are actually matching in detection and retire stale ones, because an indicator list that only grows eventually becomes noise.

Govern distribution carefully. The whole value of the sharing model collapses if a sensitive internal indicator is accidentally published to a community, so make distribution defaults conservative and train analysts on what each level means and when TLP markings apply. A mistaken broad-distribution event is hard to recall once it has propagated.

Treat MISP as a system of record and back it up. It accumulates both your own institutional knowledge and pooled community intelligence, which makes it a high-value asset and, frankly, a target. Secure access with roles, keep it patched, and integrate it through APIs rather than manual export so the loop with detection, enrichment and case management runs automatically rather than depending on someone remembering to copy a list across.

Measure whether the platform is actually earning its place. Track how many detections in a given month were driven by MISP-sourced indicators, how many case observables matched existing MISP intelligence, and how many confirmed indicators your SOC contributed back to its communities. If those numbers are low, MISP has quietly become a write-only archive rather than a working part of detection, and the fix is usually integration rather than more feeds. A threat intelligence platform proves its value at the point of detection, not by the size of its indicator count, and these metrics keep the focus where it belongs.