Threat Intelligence (TI)

🧠 Threat Intelligence Integration: A Practical Guide

Threat Intelligence (TI) helps organisations make informed decisions by providing context, indicators, and tactics about adversaries. But raw intel alone isn’t enough — it becomes truly powerful when integrated into your detection, response, and automation workflows.

🔐 “Threat intelligence isn’t just what you know—it’s how you use it.”

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📌 What Is Threat Intelligence?

Threat Intelligence is curated information about cyber threats including:

• Indicators of Compromise (IOCs): IPs, hashes, domains, URLs
• Tactics, Techniques & Procedures (TTPs): Behavioural patterns (e.g. MITRE ATT&CK)
• Threat actor profiles: Motivation, capabilities, targets
• Campaign and malware analysis

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🚀 Why Integrate Threat Intelligence?

Benefit	Description
🔍 Faster detection	Enrich alerts with context from known bad actors
⚠️ Proactive defence	Block known IOCs before they strike
🧩 Better triage	Add confidence and risk scoring to incidents
📈 Trend visibility	Track evolving threat landscapes over time
🧠 Improved decision-making	Focus response based on actor capability and intent

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🔌 Integration Use Cases

🔹 1. SIEM Enrichment

Inject intel feeds into tools like Splunk, Sentinel, or Elastic to:

• Enrich log events with known bad IPs/domains
• Correlate IOCs with event logs
• Use Sigma rules or KQL/SPL queries for detection

Example:

Enrich proxy logs with IP reputation from AbuseIPDB or AlienVault OTX.

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🔹 2. EDR/AV Integration

Use intel to update blocklists or watchlists in platforms like:

• CrowdStrike, SentinelOne, Defender for Endpoint
• Automatically quarantine endpoints communicating with known C2 hosts
• Detect tools like Mimikatz or Cobalt Strike via YARA/sigma signatures

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🔹 3. Firewall & Proxy Blocking

• Push known malicious IPs/domains to:
  • Next-gen firewalls (e.g. Palo Alto, FortiGate)
  • Secure Web Gateways (e.g. Netskope, Zscaler)
  • DNS filtering tools (e.g. Pi-hole, Umbrella)

Automate IOC ingestion from feeds using STIX/TAXII or Python scripts.

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🔹 4. SOAR Playbooks

Use threat intel in automated response actions like:

• Check file hash reputation (e.g. via VirusTotal)
• Auto-tag phishing emails from known malicious senders
• Update ticket priority based on threat actor severity

Tools: Splunk SOAR, TheHive/Cortex, Shuffle

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🔹 5. Threat Hunting and IR

• Pivot around IOCs to hunt similar behaviour
• Validate alerts using threat actor TTPs from MITRE ATT&CK
• Build detections based on real-world adversary campaigns

Example:

Hunt for powershell.exe -enc based on APT29’s known usage patterns.

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🧬 Where to Get Threat Intel

Type	Source
Free Public Feeds	AlienVault OTX, AbuseIPDB, Feodo Tracker, OpenPhish
Paid/Commercial	Recorded Future, Flashpoint, Anomali ThreatStream
Open-Source Tools	MISP, OpenCTI, ThreatFox
MITRE ATT&CK	Tactics and techniques of threat actors

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📁 STIX, TAXII & MISP Integration

Term	Description
STIX	Structured Threat Information eXpression – a format for sharing TI
TAXII	Trusted Automated Exchange of Indicator Information – delivery mechanism
MISP	Free, open-source threat intel platform; supports sharing, correlation, feeds

Tip: Use STAXX (by Anomali) or built-in connectors to bridge TAXII feeds into your SIEM or MISP instance.

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🛠️ Example Workflow (Enrich Alert in SIEM)

1. Alert generated (e.g. outbound connection to IP)
2. Lookup IP in threat intel feed (MISP, VirusTotal)
3. If match:
   • Tag event with threat actor
   • Escalate to analyst or block at firewall
4. Document result in ticketing system

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✅ Best Practices

• 🎯 Focus on actionable intel, not volume
• 🔁 Automate ingestion, enrichment, and expiration of old indicators
• 📊 Use dashboards to visualise trends (e.g. top threat actors, countries, IOC hits)
• 🤝 Participate in trusted sharing communities (e.g. ISACs, CERTs)

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🧠 Summary

Threat intelligence becomes valuable when it feeds your defenders—not when it sits in a PDF report. Integrate TI into every layer of your SOC to reduce dwell time, automate triage, and outpace attackers.

🧩 “Intelligence that isn’t operationalised is just trivia.”

✅ Threat Intelligence Integration Checklist

Use this checklist to operationalise threat intelligence across your detection, response, and automation stack.

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📌 1. Planning & Foundation

• Define your use cases (detection, response, enrichment, blocking)
• Identify stakeholders (SOC, IR, Engineering, Risk)
• Determine your source types (free, commercial, ISAC, internal)
• Choose format standards (STIX, TAXII, JSON, CSV)
• Decide where to store and correlate intel (e.g. MISP, OpenCTI)

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🧬 2. Source & Feed Configuration

• Subscribe to free threat intel feeds (OTX, AbuseIPDB, Feodo Tracker)
• Configure access to commercial feeds if available
• Ingest ATT&CK mappings and actor profiles
• Enable STIX/TAXII connectors (e.g. from MISP, Anomali STAXX)
• Verify auto-update frequency (daily/hourly where possible)

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🧠 3. SIEM Integration

• Integrate intel feeds into SIEM (e.g. Splunk, Sentinel, ELK)
• Tag logs and alerts with IOCs (IP, domain, hash)
• Map threat actor TTPs to MITRE ATT&CK techniques
• Create detection rules using Sigma, SPL, or KQL
• Test correlation rules and tune thresholds

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🖥️ 4. Endpoint & Network Defence

• Push IOCs to EDR watchlists (e.g. CrowdStrike, Defender ATP)
• Block domains/IPs on firewall, SWG, DNS filter (e.g. Umbrella, Palo Alto)
• Tag suspicious files using YARA rules
• Monitor EDR alerts for behaviour matching known TTPs

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🤖 5. SOAR & Automation

• Enrich alerts using intel APIs (VirusTotal, MISP, OTX)
• Auto-tag or prioritise tickets using actor severity
• Automate IOC-to-blocklist pipelines
• Use playbooks for phishing triage or IOC lookups
• Log and alert on enrichment confidence levels

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📊 6. Dashboarding & Reporting

• Create dashboards showing:
  • Top IOCs
  • Hits by threat actor
  • Most targeted assets or countries
• Track IOC ingestion, usage, and expiry metrics
• Include TI stats in monthly SOC or IR reports

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🧪 7. Threat Hunting & Purple Teaming

• Use threat intel to form hypotheses for hunting
• Map detections against MITRE ATT&CK
• Simulate known APT techniques in test environments
• Use tools like Caldera or Atomic Red Team for validation

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📁 8. Governance & Maintenance

• Define IOC retention policy (e.g. purge after 90 days)
• Review source reliability and coverage quarterly
• Maintain sharing relationships (ISACs, vendors, industry CERTs)
• Ensure auditability for compliance (e.g. SOX, ISO 27001, NIST)

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✅ Summary

This checklist helps ensure you’re not just collecting intel—but using it to defend, detect, and respond more effectively. Operationalised threat intelligence boosts your entire security posture.