How to Build a Blue Team

A robust cyber security posture is no longer a luxury, but a necessity. At the heart of a good cyber security defence strategy lies the blue team – the team responsible for protecting an organisation’s IT infrastructure and data from cyberattacks.

This guide explores the critical role of blue teams in cyber security. We’ll delve into their core functionalities, the benefits they offer, and the considerations involved in building or strengthening your blue team capabilities. By understanding the value of a blue team and the steps involved in its creation, organisations can take a proactive approach to fortifying their defences and mitigating cyber risks.

What is a blue team in cyber security?

A blue team in cyber security is the defensive counterpart to a red team. While red teams simulate real-world attacks to test an organisation’s security posture, blue teams focus on protecting the organisation’s IT infrastructure and data from cyberattacks. They act as the organisation’s first line of defence, working tirelessly to identify, analyse, and respond to security incidents.

While red teams act as simulated attackers, constantly probing and testing an organisation’s defences for vulnerabilities, blue teams serve as the defenders. Their primary function is to safeguard the network, detect potential threats, and respond swiftly to security incidents. Both red and blue teams play vital roles in cyber security – red teams identify weaknesses, and blue teams work to fortify the overall security posture.

You can find out more about the differences between red teams and blue teams in our article: Red Teams vs Blue Teams.

Why build a blue team?

Building a strong blue team offers several compelling advantages for organisations seeking to bolster their cyber security defences. There are some key reasons to consider establishing an internal blue team or partnering with a reputable cyber security recruitment agency to find skilled blue team professionals.

A blue team’s core function is to continuously monitor and analyse the security environment, identifying vulnerabilities and implementing mitigation strategies. This proactive approach significantly strengthens the organisation’s overall security posture, reducing the attack surface and making it more difficult for attackers to gain a foothold.

When a cyberattack occurs, a well-rehearsed blue team can respond swiftly and effectively, minimising damage and downtime. The blue team’s expertise in incident response procedures allows them to contain the breach, eradicate the threat, and restore affected systems efficiently. This can save the organisation significant financial losses and reputational damage. As mentioned earlier, blue teams can play a vital role in educating employees on cyber security best practices. By fostering a culture of security awareness within the organisation, blue teams can significantly reduce the risk of successful social engineering attacks, a popular tactic used by cybercriminals.

Many industries have data privacy regulations that mandate specific security measures. A strong blue team can help organisations comply with these regulations by ensuring they have the necessary monitoring, detection, and response capabilities in place.

Building your blue team

The decision to build an internal blue team or outsource to a specialist company depends on several factors, including budget, available resources, and in-house expertise.

Internal blue team:

Skills and expertise: Building a successful internal blue team requires recruiting individuals with a diverse skill set in security monitoring, incident response, threat analysis, and security tools. Look for individuals with certifications like Security+, Certified Information Systems Security Professional (CISSP), and GIAC Security Essentials (GSEC).
Team size and structure: The size and structure of your internal blue team will depend on the size and complexity of your organisation. Smaller organisations might benefit from a single blue team member who can work collaboratively with other security teams, while larger organisations might require a dedicated blue team unit with specialised roles.

Cyber security recruitment agencies, like Intaso, can connect you with experienced blue team professionals, eliminating the need for internal recruitment and training.

Outsourcing to a blue team consultancy:

Access to expertise: cyber security recruitment agencies offer access to a wealth of expertise and experience that may not be readily available within an organisation. However, for a more specialised approach, consider partnering with a blue team consultancy. These consultancies house dedicated blue team professionals with a singular focus on defensive cyber security operations.
Experience and best practices: Blue team consultancies typically have extensive experience working with various organisations across different industries. They can bring valuable best practices and proven methodologies to the table, ensuring your blue team operations are optimised for effectiveness.
Cost-effectiveness: For organisations with limited internal resources, outsourcing to a blue team consultancy can be a cost-effective solution. You gain access to a fully equipped team without the need for internal recruitment, training, and ongoing management.

What is the blue team process?

The blue team process is a structured approach to defending an organisation’s IT infrastructure and data from cyber attacks. It involves a combination of ongoing activities and specific procedures followed during an incident. Here’s a breakdown of the key elements:

1. Continuous monitoring and threat detection:

The foundation of any strong blue team lies in its ability to constantly monitor the network environment and proactively identify potential threats. Blue team member activities include:

Security Information and Event Management (SIEM): Blue teams utilise SIEM tools to continuously monitor network activity for suspicious events. SIEM tools aggregate data from various security sources like firewalls and intrusion detection systems (IDS), generating alerts that require investigation.
Log analysis: Blue team members analyse logs from security sources to identify potential indicators of compromise (IOCs) that may suggest malicious activity.
Threat intelligence: Leveraging threat intelligence feeds helps blue teams stay updated on the latest cyber threats and attacker tactics, techniques, and procedures (TTPs). This allows them to proactively hunt for these threats within the network.
Vulnerability scanning: Regular vulnerability scanning helps identify weaknesses in systems and applications that attackers could exploit. By patching these vulnerabilities promptly, blue teams can significantly reduce the attack surface.

2. Incident response:

When a security incident occurs, the blue team follows a well-defined incident response plan, typically adhering to the DCER framework:

Detection: As mentioned earlier, blue teams leverage SIEM tools and other security measures to detect security incidents. They may also receive reports of suspicious activity from employees or external sources.
Containment: The primary objective is to contain the breach and prevent further damage. This might involve isolating infected devices, blocking malicious traffic, and revoking compromised user credentials.
Eradication: After containing the threat, the blue team works to eradicate the attacker from the network and remove any malware or backdoors that may have been installed. This may involve forensic analysis of infected systems.
Recovery: The final stage involves restoring affected systems and data to their pre-attack state. The blue team ensures all systems are patched and up-to-date to prevent similar attacks.

3. Threat hunting:

A proactive blue team doesn’t wait for incidents to happen. They actively hunt for threats within the network using various techniques:

Log analysis: Looking for unusual patterns or suspicious activities within logs.
Network traffic analysis: Monitoring network traffic for anomalies that might indicate malware or unauthorised access attempts.
Endpoint security monitoring: Monitoring endpoint security solutions for signs of compromise on individual devices.

4. Security Awareness Training:

A strong security posture relies on user awareness. Blue teams can play a role in educating employees on cyber security best practices, such as phishing email identification and password hygiene.

Building a strong blue team is an essential step towards fortifying your organisation’s cyber security defences. By continuously monitoring your network, proactively hunting for threats, and effectively responding to security incidents, a blue team can significantly reduce your risk of cyberattacks and minimise the potential impact if one occurs.

If you’re considering building an internal blue team or seeking a reputable cyber security recruitment agency to partner with, look no further than Intaso. We have a proven track record of connecting organisations with highly skilled cyber security professionals, including experienced blue team members. We can help you find the right talent to build a strong internal blue team or identify a cyber security recruitment agency that perfectly aligns with your organisation’s specific needs.