Threat Intelligence

Threat intelligence is organized knowledge about attackers, their tools, and their habits. Security teams use it to predict likely attacks, spot early warning signs, and prioritize defenses. Good intelligence answers a practical question: what threatens us right now, and what should we do about it?

The Neighborhood Watch Analogy

Neighbors share news about a burglar who targets homes with unlocked back doors. Everyone checks their locks that evening. Nobody waits for the burglar to arrive. Threat intelligence shares warnings across organizations in the same way, and each team acts before the attack reaches them.

Levels of Intelligence

Level	Audience	Content	Example
Strategic	Executives	Broad trends and risks	Attacks on cloud storage in the retail sector are rising
Operational	Security managers	Campaign details and attacker goals	A group targets cloud admin accounts with fake login pages
Tactical	Defenders and engineers	Methods and techniques	Attackers create hidden access keys after first entry
Technical	Tools and analysts	Specific indicators	Malicious addresses and file fingerprints

Indicators of Compromise

An indicator of compromise, or IoC, is evidence that an attack happened or is underway. Common indicators include:

• Network addresses tied to known attackers
• Domain names used in phishing campaigns
• File fingerprints of known malicious programs
• Odd account behavior, such as logins at unusual hours

The Intelligence Cycle

 Direction  --> Collection --> Processing --> Analysis --> Sharing
     ^                                                        |
     +---------------- Feedback from users <-----------------+

Direction

Leaders decide what questions matter. A cloud-focused company asks about attacks on cloud accounts and misconfigured storage.

Collection

Analysts gather data from provider advisories, industry sharing groups, government alerts, security vendors, and internal logs.

Processing and Analysis

Analysts remove duplicates, check accuracy, and add context. A raw list of addresses becomes a useful report once an analyst explains who uses them and why.

Sharing

Reports reach the right audience in the right form. Executives receive a short summary, and engineers receive technical details.

Where Intelligence Comes From

• Open sources, such as public advisories and security blogs
• Information sharing groups for specific industries
• Commercial intelligence feeds
• Cloud provider security bulletins
• Internal sources, such as past incidents and honeypots

Putting Intelligence to Work

Intelligence report: "Attackers target exposed access keys in code repositories"
        |
        v
Actions: Scan repositories for keys --> Rotate found keys --> Add alert for key misuse
        |
        v
Outcome: Attack path closed before use

Real-World Example: A Fake Login Wave

An industry sharing group warns members about fake cloud console login pages. The report includes domain names and screenshots. A member company adds the domains to its web filter, updates staff awareness training with the screenshots, and writes a SIEM rule that flags logins from the listed addresses. Two weeks later, the rule catches an employee who clicked a phishing link. The team resets the password before any damage occurs.

Judging Intelligence Quality

• Accuracy: does the source have a good track record?
• Timeliness: does the information still apply?
• Relevance: does it match our technology and industry?
• Actionability: does it tell us what to do?

Key Takeaways

Threat intelligence turns scattered warnings into action. Four levels serve four audiences. Relevant, timely, and actionable information strengthens detection and prevention.