What Is Threat Intelligence
and How Does It Work?

Threat intelligence is the collection, processing, and analysis of information about current and emerging cyber threats — enabling organisations to make informed decisions about their defences before an attack occurs.

Why threat intelligence matters

Most cybersecurity tools are reactive — they detect an attack after it has started. Threat intelligence is proactive: it tells you who is targeting organisations like yours, what techniques they are using, and what indicators to watch for before they reach your perimeter.

Without threat intelligence, security teams operate in the dark — responding to alerts without context, prioritising vulnerabilities without knowing which ones attackers are actively exploiting, and building defences without knowing what they are defending against.

The four types of threat intelligence

Where does threat intelligence data come from?

Threat intelligence is sourced from a combination of open-source, commercial, and proprietary feeds:

• →Open-source intelligence (OSINT) — public threat reports, security researcher disclosures, dark web monitoring
• →Commercial threat feeds — curated IOC databases from vendors tracking nation-state and criminal threat actors
• →Information sharing communities — industry-specific ISACs (Information Sharing and Analysis Centres)
• →Honeypots and sinkhole networks — infrastructure designed to attract and observe attacker behaviour
• →Incident response data — intelligence derived from real-world breach investigations
• →Malware analysis — reverse engineering of malicious code to understand attacker capabilities and infrastructure

Tristarnex tracks 1.2M+ threat indicators from 34 curated global feeds, correlating them against client environments in real time.

What are indicators of compromise (IOCs)?

Indicators of compromise are technical artefacts that suggest a system has been or is being attacked. Common IOC types include malicious IP addresses, domain names used for command-and-control, file hashes of known malware, suspicious registry keys, and anomalous network traffic patterns. IOCs are loaded into security tools — firewalls, SIEMs, endpoint detection platforms — to trigger automatic detection and blocking when a match is found.

How businesses use threat intelligence

Practical applications of threat intelligence for organisations of every size:

• →Prioritising vulnerability patching — focus on CVEs with active exploits in the wild, not just high CVSS scores
• →Configuring detection rules — tune your SIEM and EDR to look for TTPs used by threat actors targeting your sector
• →Informing penetration testing — test defences against the techniques real adversaries are currently using
• →Reducing alert fatigue — context-enriched alerts mean analysts investigate fewer false positives
• →Supporting incident response — understand attacker objectives and likely next moves during an active incident