Blue Team is about defensive security, meaning it constantly monitors for attacks and tries to respond to them quickly. Depending on a company's size and sector, Blue Team can include a lot of different roles and subdepartments, usually counting 3 to 50 members total. Now, let's explore the most common Blue Team departments.
Security Operations Center (SOC)
That's where you are most likely to start your cyber security journey! SOC is the central hub for an organization's cyber security - they are the first line of defense, work with various alerts, and handle most attacks. You can read more about SOC structure in this room, but an efficient SOC is usually composed of the following roles:
- L1 Analysts: Junior members who triage alerts and pass complex cases to L2
- L2 Analysts: Experienced members who investigate more advanced attacks
- Engineers: Experts in configuring security tools like EDR or SIEM
- Manager: A person who manages the whole SOC team
Cyber Incident Response Team (CIRT)
If SOC expertise is not enough or the incident goes out of control, you urgently call the "firefighters" - CIRT, also called CSIRT or CERT. The members should have a broad knowledge of cyber threats and handle breaches without depending on tools like EDR or SIEM. A CIRT job is stressful and responsible, but also rewarding. Here are a few CIRT examples:
- JPCERT: Japan's CERT handling nation-wide breaches
- Mandiant: A private team responding to global cyber incidents
- AWS CIRT: Investigates security incidents of AWS customers
Specialized Defensive Roles
Large companies, technology-focused startups, and government agencies often require narrow and specialized Blue Team roles - exciting and highly valuable, but requiring deep topic knowledge and broad experience in broader fields like SOC or IT. These narrow roles can include:
- Digital Forensics Analyst: Uncover hidden threats in disk and memory
- Threat Intelligence Analyst: Gather data about emerging threat groups
- AppSec Engineer: Maintain a secure software development lifecycle
- AI Researcher: Study AI threats and how to defend against them