Collecting Threat Intelligence with MISP

Overview

MISP (Malware Information Sharing Platform) is an open-source threat intelligence platform for gathering, sharing, storing, and correlating Indicators of Compromise (IOCs) of targeted attacks, threat intelligence, financial fraud information, vulnerability information, or counter-terrorism information. This skill covers deploying MISP, configuring threat feeds, using the PyMISP API for programmatic access, and building automated collection pipelines that aggregate IOCs from multiple community and commercial sources.

Prerequisites

Python 3.9+ with pymisp library installed
Docker and Docker Compose for MISP deployment
Understanding of STIX 2.1 and TAXII 2.1 protocols
Familiarity with IOC types: hashes, IP addresses, domains, URLs, email addresses
Network access to MISP community feeds (circl.lu, botvrij.eu)

Key Concepts

MISP Architecture

MISP operates on an event-based model where threat intelligence is organized into events containing attributes (IOCs), objects (structured groupings of attributes), galaxies (threat actor/malware clusters linked to MITRE ATT&CK), and tags for classification. Synchronization between MISP instances uses a pull/push model over HTTPS with API key authentication.

Feed Types

MISP Feeds: Native JSON/CSV feeds from MISP community (CIRCL OSINT, botvrij.eu)
Freetext Feeds: Unstructured text feeds parsed for IOCs (abuse.ch, Feodo Tracker)
TAXII Feeds: STIX/TAXII 2.1 compatible feeds from commercial and government sources
CSV Feeds: Structured CSV feeds with configurable column mapping

PyMISP API

PyMISP is the official Python library to access MISP platforms via their REST API. It supports fetching events, adding/updating events and attributes, uploading samples, and searching across the entire MISP dataset. Authentication uses an API key passed in the Authorization header.

Practical Steps

Step 1: Deploy MISP with Docker

git clone https://github.com/MISP/misp-docker.git
cd misp-docker
cp template.env .env
# Edit .env to set MISP_BASEURL, MISP_ADMIN_EMAIL, MISP_ADMIN_PASSPHRASE
docker compose up -d

Step 2: Configure Default Feeds

Enable built-in MISP feeds via the web UI or API:

from pymisp import PyMISP

misp = PyMISP('https://misp.local', 'YOUR_API_KEY', ssl=False)

# List available feeds
feeds = misp.feeds()
for feed in feeds:
    print(f"{feed['Feed']['id']}: {feed['Feed']['name']} - Enabled: {feed['Feed']['enabled']}")

# Enable CIRCL OSINT Feed
misp.enable_feed(feed_id=1)
misp.cache_feed(feed_id=1)
misp.fetch_feed(feed_id=1)

Step 3: Add Custom Threat Feeds

# Add abuse.ch URLhaus feed
feed_data = {
    'name': 'URLhaus Recent URLs',
    'provider': 'abuse.ch',
    'url': 'https://urlhaus.abuse.ch/downloads/csv_recent/',
    'source_format': 'csv',
    'input_source': 'network',
    'publish': False,
    'enabled': True,
    'headers': '',
    'distribution': 0,
    'sharing_group_id': 0,
    'tag_id': 0,
    'default': False,
    'lookup_visible': True
}
result = misp.add_feed(feed_data)
print(f"Feed added: {result}")

Step 4: Programmatic Event Search and Retrieval

from pymisp import PyMISP, MISPEvent
from datetime import datetime, timedelta

misp = PyMISP('https://misp.local', 'YOUR_API_KEY', ssl=False)

# Search for events from the last 7 days
result = misp.search(
    controller='events',
    date_from=(datetime.now() - timedelta(days=7)).strftime('%Y-%m-%d'),
    type_attribute='ip-dst',
    to_ids=True,
    pythonify=True
)

for event in result:
    print(f"Event {event.id}: {event.info}")
    for attr in event.attributes:
        if attr.type == 'ip-dst' and attr.to_ids:
            print(f"  IOC: {attr.value} (category: {attr.category})")

Step 5: Export IOCs for Downstream Tools

# Export as STIX 2.1 bundle
stix_output = misp.search(
    controller='events',
    return_format='stix2',
    tags=['tlp:white'],
    published=True
)

# Export IDS-flagged attributes as Suricata rules
suricata_rules = misp.search(
    controller='attributes',
    return_format='suricata',
    to_ids=True,
    type_attribute=['ip-dst', 'domain', 'url']
)

# Export as CSV for SIEM ingestion
csv_output = misp.search(
    controller='attributes',
    return_format='csv',
    type_attribute='ip-dst',
    to_ids=True
)

Validation Criteria

MISP instance is deployed and accessible via HTTPS
At least 3 community feeds are enabled and fetching data successfully
PyMISP script can authenticate, search events, and retrieve IOCs
Events contain properly tagged and categorized attributes
Export to STIX 2.1 produces valid STIX bundles
Automated feed fetch runs on schedule (cron or MISP scheduler)

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