Strengthening UK Cyber Resilience
In today’s ever-evolving cyber landscape, organisations across the UK are grappling with the critical need to bolster their cyber resilience. For this reason, the National Cyber Security Centre’s (NCSC) Cyber Assessment Framework (CAF) serves as a vital benchmark for many, particularly those within Critical National Infrastructure and essential services. While the CAF provides a robust, outcome-focused approach, integrating it with the MITRE ATT&CK Framework can offer a powerful, practical layer to your compliance efforts.
The CAF and Its Structure
The NCSC Cyber Assessment Framework (CAF) is built on fourteen principles, which are structured to help organisations measure and improve their cyber security. These principles are, in turn, grouped into four main objectives.
The first objective is Managing Security Risk. Specifically, this focuses on the governance and risk management processes, ensuring an organisation understands its risks and has the right policies in place. Key principles here include, for instance, knowing what assets you have and managing your supply chain risks.
Next is the objective of Protecting against Cyber Attack. This is all about putting controls in place to prevent attacks. As such, it covers things like using strong identity and access controls. In addition, it also includes securing systems and data, and managing vulnerabilities effectively.
The third objective is Detecting Cyber Security Events. This is about being able to see when an attack is happening. Therefore, principles within this area focus on having good security monitoring and also emphasise using proactive threat hunting techniques to find malicious activity that might be hidden.
Finally, the objective of Minimising the Impact of Cyber Security Incidents ensures an organisation can respond and recover quickly. This includes having robust incident management plans and a clear business continuity strategy. Ultimately, the goal is to limit the damage from a security incident and get back to normal operations as fast as possible.
Consequently, the CAF encourages organisations to assess their capabilities against these outcomes. It’s a non-prescriptive approach, moving beyond just ticking boxes on a checklist. Although this flexibility is a key strength, it can sometimes leave organisations unsure about how to demonstrate they’ve achieved these outcomes in the real world.
Understanding the MITRE ATT&CK Framework
This is precisely where the MITRE ATT&CK Framework comes into its own. ATT&CK, which stands for Adversarial Tactics, Techniques, and Common Knowledge, is more than just a list. Rather, it’s a globally accessible knowledge base that catalogues the observed behaviours of real-world cyber adversaries.
The framework details the “how” and “why” of cyberattacks. Instead of focusing on what software an attacker uses, ATT&CK focuses on their actions. In doing so, it provides a comprehensive map of adversarial tactics and techniques. Tactics, for example, represent the adversary’s high-level goals. These are the “why” behind an attack, such as “Initial Access,” “Execution,” or “Exfiltration,” telling you what the attacker is trying to accomplish at each stage.
Within each tactic are numerous techniques. These are the specific, granular methods attackers use to achieve their goals. For example, under the “Credential Access” tactic, you’ll find techniques like “Brute Force” or “OS Credential Dumping.” Ultimately, these techniques give you a precise understanding of the actions an attacker might take.
The framework is therefore a powerful tool for defenders. It helps them move from a reactive, signature-based approach to a proactive, threat-informed one. By understanding the specific behaviours and methods of attackers, organisations can better evaluate their own defences and identify gaps in their security posture. Most importantly, it provides a common language for security teams to discuss, analyse, and defend against threats.
How the Frameworks Work Together
By overlaying ATT&CK’s insights onto the CAF’s objectives, you gain a better understanding. This understanding is more detailed, and as a result, it is also more actionable. Consider CAF Objective B: “Protecting against cyber attack,” which includes principles like “Identity and Access Control.” While the CAF provides the desired outcome, ATT&CK illuminates the specific techniques that might exploit weaknesses in these areas.
For example, if the CAF asks you to show effective identity controls, MITRE ATT&CK offers many techniques for “Credential Access.” These include “Brute Force” or “OS Credential Dumping.” By understanding these specific behaviours, you can assess your controls. Are they robust enough? Can they detect and prevent such attacks? Do your logging solutions capture signs of a brute force attempt? Furthermore, do you use multi-factor authentication?
Enhancing Detection and Defence
Similarly, under CAF Objective C, ATT&CK provides a framework to help you know what malicious activities to look for. You can go beyond simply having “Security Monitoring” and verify if your tools detect specific ATT&CK techniques. These might include “Process Injection” or “Masquerading.” This allows for a proactive approach, which helps with threat hunting, moving you beyond reacting to known signatures.
Furthermore, integrating ATT&CK helps with defensive gap assessments. You can map your existing security controls against various ATT&CK techniques. As a result, this helps you pinpoint vulnerabilities. You can, for instance, see where your organisation is exposed to specific behaviours. This allows for a prioritised investment, so you can focus resources on the most relevant threats.
In essence, while the NCSC Cyber Assessment Framework sets the goals, the MITRE ATT&CK Framework provides the intelligence to achieve them. It turns abstract security principles into concrete actions. For any UK organisation, embracing this synergy is not just beneficial; it is a necessary step towards a truly resilient cyber posture.