Threat intelligence tells a SIEM what to look for. The SIEM tells you whether it is happening in your network. Integrating them means loading indicators and context into the SIEM, such as IP addresses, domains, file hashes and attacker techniques, so its logs are matched against current threats. The goal is less noise and faster triage.
This guide shows what flows from one system to the other, which integration methods exist, what to check before you connect a feed, and which use cases pay off first. It ends with how Brandefense data reaches the SIEMs on our integrations page.
Threat Intelligence vs SIEM: What Each One Does
A SIEM collects logs from servers, endpoints, network devices and cloud services, and correlates them to find incidents. NIST describes a SIEM as a program that provides centralized logging for a variety of log types. Threat intelligence is outside knowledge about attackers. NIST SP 800-150 lists indicators of compromise (IOCs), the tactics, techniques and procedures (TTPs) of threat actors, suggested actions and incident findings as cyber threat information.
| Topic | Threat intelligence | SIEM |
|---|---|---|
| Role | Supplies information about current and emerging threats | Collects and correlates data from the IT infrastructure |
| Knows about | Threat actors, tactics and indicators of compromise | Security events inside the organization |
| Question it answers | Who is attacking, and what do they use? | Is it happening here, right now? |
| Key functions | Insight into the threat landscape | Log management, threat detection, incident response, compliance reporting |
Neither replaces the other. A SIEM sees only what your systems log. Threat intelligence knows what attackers do elsewhere but cannot see your network.
How Does SIEM and Threat Intelligence Integration Work?
Most integrations follow the same loop, whichever products you use.
- Ingest. The SIEM receives indicators from a feed, an API or a platform.
- Normalize. The data is mapped to the fields the SIEM uses. Many feeds use STIX, a language for expressing cyber threat information, and TAXII, a protocol that exchanges it over HTTPS.
- Match. New log events are compared with the indicators, for example a destination IP address against a list of known bad addresses.
- Enrich. A match adds context to the alert, such as the actor or campaign behind the indicator.
- Alert. The SIEM raises or re-scores the alert. A SOAR tool can start a playbook.
- Feed back. Analyst findings and expired indicators go back to the source, so the list stays clean.
STIX 2.1 and TAXII 2.1 are OASIS standards. A shared format lets a feed from one vendor load into a SIEM from another.
Which Integration Methods Can You Use?
The right method depends on your SIEM, your team and how many sources you run. Five are common.
| Method | How it works | Fits when |
|---|---|---|
| Direct feed | The SIEM pulls a feed (CSV, JSON or STIX) on a schedule | You use one source and want little custom work |
| TAXII | The SIEM polls a TAXII server for STIX collections | Your SIEM has a TAXII client and you want a standard format |
| API | A script or tool calls the vendor REST API and writes to the SIEM | You need custom fields, filters or more than alerts |
| Vendor connector | A prebuilt app or integration for one SIEM | Your SIEM is on the vendor list and you want a fast start |
| Platform in front | A threat intelligence platform dedupes and scores, then passes data on | You run several feeds and want one cleaned list |
What Should You Check Before You Connect a Feed?
These checks answer the question of integration requirements.
- Timeliness. How fast do new indicators arrive, and how old are the oldest?
- Quality. Does each indicator carry a source, a confidence level and context, or only a bare IP address?
- Expiry. IP addresses and domains can change hands. Set a time limit so stale indicators stop firing.
- Volume and licensing. Check how your SIEM counts ingested data before you add a large feed.
- False positives. Start with a few rules in test mode, tune them, then widen.
- ATT&CK mapping. MITRE ATT&CK is a knowledge base of adversary tactics and techniques. Tag detections with it, so alerts show behavior and not only addresses.
What Can You Do With Threat Intelligence in a SIEM?
Raise a Failed-Login Alert From a Botnet IP
A log shows many failed logins from one IP address. On its own this may look minor. If threat intelligence links the address to a known botnet, the alert gets a higher severity. The team can block the address or reset the targeted accounts.
Match a Phishing Domain in Proxy Logs
A user’s browser contacts a domain that your feed flags as a phishing site. The SIEM matches the domain, raises an alert and shows who else visited it. The team can then block the domain and warn those users.
Catch Leaked Credentials in Use
If your intelligence includes leaked credentials, the SIEM can compare them with sign-in events. A login that uses a leaked password becomes a high-priority alert and starts a password reset.
Hunt With Fresh Indicators
When a new indicator or technique is published, analysts can search past logs for it. This threat hunting shows whether an attacker was already inside before the feed caught up.
Enrich Incidents Faster
When an incident opens, matched intelligence can tell the responder which actor is behind it and what actions are suggested. That saves research time at the start. See our guide to incident response for what happens next.
Where Do Managed SIEM and SOAR Fit?
With a managed SIEM, a provider runs the platform and the monitoring. The integration questions stay the same. Which feeds does the provider load, can you add your own, and how are indicators expired? Ask for the answers in writing.
A SOAR tool sits after the SIEM. When a matched alert fires, a playbook can enrich it, open a ticket or block an indicator. Intelligence in the SIEM decides which alerts reach that playbook.
How Does Brandefense Connect to Your SIEM?
Brandefense sends external threat alerts and intelligence into the tools your team already uses. The integrations page lists these SIEMs: Splunk, ArcSight and LogRhythm, plus IBM QRadar, Microsoft Sentinel and ManageEngine Log360, which connect over TAXII. Cortex XSOAR covers SOAR.
For anything outside that list, Brandefense has a RESTful API that supports STIX 2.0 and TAXII 2.1. Ticketing, threat intelligence platform and fraud system connections run through the API and the Model Context Protocol (MCP), which lets AI agents query Brandefense findings.
The aim is to see internal and external risk side by side. External exposure alerts from Brandefense sit in your SIEM next to your own logs. Brandefense is a cloud-native SaaS platform, so nothing needs to be installed. See every connection, including the one for your SIEM, on the integrations page.
What Should You Do Next?
Pick one use case from this guide, such as botnet IP matching, and connect one feed in test mode. Watch alerts and false positives for two weeks, tune the rules, then widen the scope.
To bring Brandefense cyber threat intelligence into your SIEM, look for your tool on the integrations page, then request a demo. The team will show how the data reaches your stack.