Blue Team Tools

Blue Team Tools

The blue team defends: building visibility, writing detections, hunting for what slipped past, and closing the loop with the red team. This page is a practical loadout — what to deploy and how the pieces fit — oriented around the MITRE ATT&CK framework, the shared language for describing adversary behavior.

Detection engineering

Detection engineering treats detections as code: version-controlled, tested, and mapped to ATT&CK techniques so you know your coverage.

• SIEM / log pipeline — centralize logs and alert on them. Open-source options: Wazuh, Security Onion, the Elastic/OpenSearch stack.
• Sigma — a vendor-neutral detection rule format. Write a rule once, convert it to your SIEM’s query language. SigmaHQ ships a large community ruleset.
• Map coverage to ATT&CK with the ATT&CK Navigator so gaps are visible, then prioritize new detections by the techniques most relevant to your threat model — see Threat Modeling.

Tip

A detection you have never fired is unproven. Use Atomic Red Team to safely execute individual ATT&CK techniques in a lab and confirm your detections actually trigger.

Threat hunting

Hunting is proactively looking for adversaries your alerts didn’t catch, starting from a hypothesis (“an attacker is using scheduled tasks for persistence”) rather than an alert. A repeatable loop:

1. Form a hypothesis grounded in an ATT&CK technique.
2. Gather the relevant telemetry (process creation, auth, DNS, network).
3. Analyze for anomalies and known-bad patterns.
4. If you find something → respond; if not → turn the successful hunt into an automated detection so you never hunt it manually again.

Deception technology

Deception flips the economics: planted, fake assets that no legitimate user should ever touch, so any interaction is a high-fidelity alert with almost no false positives.

• Canary tokens — free tripwires: a token embedded in a document, a fake AWS key, a DNS callback, a URL. When triggered, you get alerted that someone is poking where they shouldn’t.
• Honeypots — decoy systems. T-Pot is a turnkey, multi-honeypot platform that captures attacker activity for analysis.

Deception is one of the highest signal-to-noise additions a small team can deploy.

Purple team workflow

Purple teaming runs red and blue together: the red team executes a known technique while the blue team watches whether detection fires — then both sides fix gaps immediately.

1. Pick an ATT&CK technique (often one your threat model flags as likely).
2. Red executes it (manually or via Atomic Red Team) in a controlled window.
3. Blue confirms telemetry captured it and an alert fired.
4. Gap? Write/tune the detection and re-test. Document coverage.

This tight loop improves detections far faster than red and blue operating in isolation. See Cyber Red Teaming for the offensive half.

Getting started (small team)

Need	Start with
Endpoint + log visibility	Wazuh or Security Onion
Detection rules	Sigma + SigmaHQ ruleset
Coverage mapping	ATT&CK Navigator
Detection validation	Atomic Red Team
High-signal alerts cheaply	Canary tokens

Related

• Threat Modeling — decide what to detect first
• Enterprise Incident Response — what happens after an alert fires
• Cyber Red Teaming — the offensive partner in purple teaming
• Threats Catalog — real adversary TTPs to hunt for