Blue Team
What is Blue Team?
Blue TeamThe defensive security group responsible for monitoring, detecting, responding to, and continuously improving defenses against attacks.
Like red teams, the blue team concept comes from military exercises where the "blue" force represented the defenders. In cybersecurity, the blue team includes SOC analysts, detection engineers, incident responders, threat hunters, and the operators of security platforms (SIEM, EDR, XDR, SOAR, IAM). Their work spans prevention, detection, response, and recovery: hardening systems, writing and tuning detections, triaging alerts, leading incident investigations, and feeding lessons learned back into architecture and process. The blue team's effectiveness is often measured with metrics like MTTD, MTTR, and detection coverage versus MITRE ATT&CK.
● Examples
- 01
A SOC analyst triaging an EDR alert and pivoting through SIEM data to confirm a phishing-driven foothold.
- 02
A detection engineer writing a Sigma rule to catch the technique used in last week's red-team exercise.
● Frequently asked questions
What is Blue Team?
The defensive security group responsible for monitoring, detecting, responding to, and continuously improving defenses against attacks. It belongs to the Defense & Operations category of cybersecurity.
What does Blue Team mean?
The defensive security group responsible for monitoring, detecting, responding to, and continuously improving defenses against attacks.
How do you defend against Blue Team?
Defences for Blue Team typically combine technical controls and operational practices, as detailed in the full definition above.