CORIE Framework Explained: How Red Teaming Tests Cyber Resilience

Why CORIE matters 

Cyber threats in Australia are increasing in frequency and complexity. The Australian Cyber Security Centre (ACSC) reports a sharp rise in increasingly sophisticated attacks targeting sectors such as finance, energy, government, and healthcare. At the same time, the average cost of a cyber incident for a medium-sized Australian business has reached $97,200, highlighting the growing financial and operational impact of cybercrime.

For many organisations, the challenge is no longer just preventing breaches. It is understanding how effectively they can detect, respond to, and recover from an attack under real-world conditions.

Traditional security testing typically focuses on identifying vulnerabilities or validating individual controls. While valuable, these assessments rarely show how well an organisation performs during a coordinated cyber incident that involves technical teams, executives, and business stakeholders.

CORIE addresses this gap. By combining threat intelligence, realistic adversary simulation and cross-functional testing, it evaluates how your organisation detects, escalates, communicates and makes decisions while a sophisticated attack is underway.

Rather than asking, “Do your security controls exist?”, CORIE asks a more demanding question: can your organisation detect, respond to and recover from a sophisticated attack before it becomes a business crisis?

For many organisations, this is where the exercise delivers the most value. It surfaces issues that are difficult to identify through conventional testing alone, particularly around coordination, communication and decision-making under pressure.

How CORIE measures cyber resilience

CORIE reflects a broader change in cyber security, from validating individual controls to testing organisational resilience as a whole. It does this through a combination of:

• • Threat intelligence to model realistic adversaries

  • Adversary simulation that replicates real attack techniques

  • Cross-functional testing across security, IT, executives, communications and business stakeholders

This combination gives a far more accurate picture of operational resilience than technical testing alone.

CORIE vs traditional red teaming

Traditional red team exercises simulate attacker behaviour to identify vulnerabilities in systems and networks. However, the structure, governance, and provider requirements can vary significantly between engagements.

CORIE takes a more structured, intelligence-led approach that evaluates how organisations detect, respond to, and manage cyber incidents across people, processes, and technology in real scenarios. 

Traditional red teaming

• • Typically focused on technical exploitation and attack simulation

  • Engagement structure varies depending on the provider

  • Provider certifications may include OSCP, OSCE, CRTO, GXPN, or OSEP, but these are not formally required or tied to specific roles

  • Often conducted as point-in-time assessments

CORIE-aligned red teaming

• • Intelligence-led simulations based on real threat actors

  • Tests people, processes, and technology together

  • Evaluates detection, response coordination, and recovery capability

  • Requires certified individuals assigned to defined roles, including:

• • • • Red Team Lead: CREST Certified Simulated Attack Manager (CCSAM)

      • Red Team Specialist: CREST Certified Simulated Attack Specialist (CCSAS)

      • Technical roles: OSCE3 or GXPN

      • Threat Intelligence Lead: CREST Certified Threat Intelligence Manager (CCTIM) or GIAC Cyber Threat Intelligence (GCTI)

These role-based requirements, defined in the CFR CORIE Provider Guide, ensure consistency, governance, and credibility in how exercises are delivered. 

How CORIE compares to TIBER-EU and CBEST

CORIE is part of a small family of intelligence-led resilience testing frameworks used by financial regulators worldwide. The two most closely related are TIBER-EU, used across the European Union, and CBEST, used in the United Kingdom by the Bank of England.

All three frameworks share the same foundation: realistic, threat intelligence-led red team exercises that test detection and response rather than only technical vulnerabilities.

The main differences between the three sit in governance and provider requirements rather than methodology. CORIE, for example, sets out specific certification requirements for red team leads, specialists and threat intelligence leads. For Australian organisations, particularly those with offshore operations already familiar with TIBER-EU or CBEST, a CORIE-aligned exercise will generally satisfy the same underlying resilience objectives, even though the accreditation and reporting requirements differ.

How a CORIE exercise works

A CORIE red team exercise unfolds across four stages, each designed to reveal how an organisation performs under pressure. 

Figure: The CORIE exercise lifecycle shows how threat intelligence, adversary simulation, and response testing work together to assess organisational resilience. 

1. Threat Intelligence preparation

The exercise begins with targeted intelligence gathering. Security specialists analyse the organisation’s industry, infrastructure, and threat environment to identify the most likely adversaries, attack techniques, and targets.

This intelligence informs the design of a realistic attack scenario tailored to the organisation’s risk profile.

2. Adversary simulation

The red team then launches a controlled simulation designed to replicate real attacker behaviour.

Common techniques may include:

• • Phishing and credential harvesting

  • Exploitation of exposed services

  • Lateral movement within the network

  • Privilege escalation

  • Data access or exfiltration attempts

The goal is not disruption, but to test detection and response capabilities under realistic conditions.

3. Detection and response testing

During the exercise, internal security teams attempt to detect and respond to the simulated attack.

In many exercises, teams are surprised by how long it takes to detect activity that would otherwise go unnoticed in day-to-day operations.

This phase evaluates:

• • Security monitoring effectiveness

  • Response playbooks and escalation procedures

  • Collaboration between security, IT, and leadership teams

  • The speed and accuracy of incident handling

Some participants may not know the exercise is underway, creating a more realistic scenario.

4. Reporting and resilience improvement

Once the simulation concludes, the red, blue, and executive teams review the findings.

The final report typically includes:

• • Technical observations and attack pathways

  • Detection and response gaps

  • Business-level impact analysis

  • Prioritised remediation actions

At this stage, the focus shifts from identifying issues to understanding how they impact operations and what needs to change to improve resilience.

These insights help organisations strengthen their detection, response, and overall resilience against future attacks.

Who is involved in a CORIE exercise?

CORIE exercises involve multiple teams representing different perspectives within the organisation.

Red team: Simulates adversary behaviour through controlled cyber attack techniques.

Purple team: Facilitates collaboration between attackers and defenders to improve detection capability.

Gold team: Includes executive leadership responsible for decision-making, governance, and crisis management during an incident.

Together, these roles ensure the exercise tests technical defences, operational processes, and executive response.

Common findings during CORIE exercises

Every organisation is different, but intelligence-led exercises tend to surface similar operational gaps. Common findings include:

• • Security monitoring that detects malicious activity later than expected

  • Incident response playbooks that differ from how teams actually respond under pressure

  • Unclear ownership during major incidents

  • Delays in communication between technical teams and executive stakeholders

  • Detection rules that generate excessive false positives or miss real attacker activity

  • Limited visibility across cloud services, identity platforms or third-party environments

Many organisations discover that their security technologies perform well, but the surrounding processes and decision-making need further maturity. That distinction, between a tooling gap and a process gap, is often the single most useful outcome of the exercise.

What does a CORIE exercise deliver?

A CORIE-aligned engagement produces outcomes that extend beyond a typical penetration test. For many organisations, the value lies not just in what is identified, but in how clearly those findings translate into business risk and operational impact.

Organisations can expect:

• • Executive-level reporting that translates technical findings into business risk

  • A detailed attack narrative showing how an adversary moved through the environment

  • Detection and response gap analysis across tools and teams

  • Purple team replay sessions to validate improvements

  • A prioritised remediation roadmap aligned to risk and impact

This makes CORIE particularly valuable for organisations seeking to justify security investment and improve operational readiness.

Business benefits of CORIE red teaming

CORIE-aligned red team exercises provide a practical way to validate cyber resilience in live attack conditions.

Unlike traditional testing, CORIE focuses on how effectively teams operate during an incident, delivering outcomes that extend beyond compliance.

Recent APRA resilience reviews highlight that incident response coordination and communication remain key challenges for many organisations. This reinforces the need for structured, intelligence-led testing that evaluates how teams detect, respond, and collaborate under pressure.

Key benefits include:

• • Proactive resilience, helping identify weaknesses before they can be exploited

  • Regulatory readiness, demonstrating strong governance and testing discipline

  • Executive visibility, translating technical findings into business risk

  • Improved incident response, strengthening detection, escalation, and containment

  • Continuous improvement, tracking maturity over time

By aligning with the CORIE framework, organisations can assess their performance against a recognised structure for resilience testing. This helps leadership connect cyber risk to operational impact and make more informed investment decisions.

When should organisations run a CORIE exercise?

Organisations typically adopt CORIE-aligned testing once they reach a certain level of security maturity.

Common triggers include:

• • Major cloud migrations, digital transformation, or system integrations

  • Mergers or acquisitions

  • Compliance or audit cycles

  • New executives or board members requiring assurance

  • A recent security incident or shift in the threat landscape

At this stage, the focus shifts from identifying vulnerabilities to validating resilience under real conditions.

For organisations at this point, a structured approach can provide a clear view of how well detection and response capabilities perform in real-world scenarios.

How to prepare for CORIE

To maximise value from a CORIE exercise, organisations should focus on preparation across people, process, and governance: 

• • Align technical, risk, and executive stakeholders: Ensure clear roles, communication paths, and shared objectives 

  • Identify critical systems (“crown jewels”): Focus testing on assets that matter most to business operations 

  • Define scope and safety boundaries: Set clear rules to ensure safe, controlled execution of the exercise 

Strong preparation ensures the exercise runs safely and produces clear, actionable insights that strengthen resilience across your business.

Choosing the right CORIE provider

Selecting the right partner is critical to achieving meaningful outcomes from a CORIE-aligned exercise.  A qualified provider should not just simulate attacks, but deliver insights that improve detection, response, and decision-making across the organisation. 

When evaluating providers, look for:

• • Experience delivering intelligence-led red team exercises, with demonstrated capability in adversary simulation and threat-informed testing

  • Understanding of CORIE principles and regulatory context, including how exercises align with resilience and governance objectives

  • Defined roles with relevant certifications and experience, with clear assignments across the red team and threat intelligence functions

  • Strong threat intelligence capability, able to model realistic adversaries based on your industry and environment

  • Ability to translate technical findings into business impact, with reporting that supports executive decision-making

  • End-to-end delivery across the exercise lifecycle, from planning and simulation through to reporting and remediation guidance

A CORIE-aligned provider should help organisations move beyond identifying vulnerabilities to understanding how effectively they can respond under real-world conditions.

CORIE-aligned cyber resilience testing

The Missing Link provides cyber security services, including penetration testing, adversary simulation, and managed security services, helping organisations reduce cyber risk and improve resilience. The Missing Link supports organisations across Australia with CORIE-aligned red team exercises and cyber resilience programs. By combining deep offensive security expertise with structured, intelligence-led testing, organisations gain a clear understanding of how their security capabilities perform under real-world conditions.

Prove your cyber resilience

Cyber resilience isn't proven through tools or compliance alone. It's proven through realistic testing of how your organisation performs during an attack.
CORIE-aligned exercises provide a structured, intelligence-led approach to measuring that readiness.

Assess. Simulate. Strengthen.

Speak with The Missing Link’s cyber resilience experts to evaluate your readiness and plan a CORIE-aligned resilience exercise.

Learn more about CORIE readiness and red team testing.

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