Threat-Led Penetration Testing (TLPT): The Ultimate Guide 

Threat-Led Penetration Testing (TLPT) is an advanced cybersecurity assessment that simulates real world attack scenarios to test an organisation’s resilience against cyber threats.  

TLPT differs from traditional penetration testing. Unlike traditional penetration testing, which follows a standard checklist of vulnerabilities, TLPT takes an intelligence-driven approach, leveraging real world threat data to craft tailored attack simulations – designed to mirror tactics used by real cyber adversaries.  

This approach provides a deeper understanding of an organisation’s security posture, exposing vulnerabilities that traditional and automated testing may not uncover. 

So, why do businesses, especially financial institutions, need TLPT? With cyber threats escalating month by month, financial institutions and any business handling sensitive data are all prime targets for cybercriminals. New regulations have been introduced that provide more in-depth guidance on conducting security testing for operational resilience, in particular the new DORA mandate outlining regular Threat-Led Penetration Testing (TLPT) at least every 3 years. 

TLPT helps organisations proactively assess and improve their defences, by simulating real world threats. In line with these new regulations, financial institutions, that handle vast amounts of sensitive customer and financial data, must ensure they can detect, respond to, and mitigate cyberattacks effectively. By implementing TLPT, these organisations strengthen their cybersecurity resilience and operational security. 

This guide will explore the key aspects of TLPT, its importance for financial institutions, compliance requirements, testing methodologies, and how your organisation can implement it effectively to answer regulation compliance and strengthen your security posture. 

Key Takeaways

• TLPT simulates real-world attacks using current threat intelligence, providing a deeper, more realistic assessment than traditional pen testing.
• Financial institutions must now perform TLPT every three years under DORA regulations to ensure operational resilience.
• Unlike checklist-based testing, TLPT tailors attack scenarios based on actual adversary tactics, techniques, and procedures (TTPs).
• Effective TLPT requires collaboration between internal security teams and third-party experts, combining contextual knowledge with independent validation.
• Regulatory compliance frameworks like DORA, TIBER-EU, and ISO 27001 guide TLPT best practices and ensure cyber resilience through structured, intelligence-led testing.

What is Threat-Led Penetration Testing (TLPT)?

As described above, Threat-Led Pen Testing is an advanced approach to cybersecurity assessments, which are designed to be closely aligned with how a real life cybercriminal might approach an attack on your business.  

These tests are based on deep threat intelligence information that informs the testers how real world adversaries are attempting to gain access to your networks, systems and applications. This information can be taken from open source threat intelligence networks and the dark web.  

TLPT vs. Traditional Penetration Testing

TLPT goes beyond a traditional penetration test by adopting a threat actor mindset, using threat intelligence to mimic more sophisticated cyberattacks. As mentioned, the benefit of this approach is that it provides a deeper understanding of your security posture, exposing weaknesses that traditional testing may overlook and allows for mitigation before a malicious actor can exploit the vulnerability.  

Feature	Traditional Penetration Testing	Threat-Led Penetration Testing (TLPT)
Approach	Checklist-based, generalised testing	Intelligence-led, real-world attack simulation
Objective	Identify vulnerabilities using a static methodology	Simulate real-world threats based on latest attack techniques
Threat Intelligence	Minimal integration	Heavily relies on up-to-date cyber threat intelligence
Scope	Focuses on known weaknesses	Tailored attack vectors based on evolving threats
Engagement	Periodic assessment	Continuous learning and adaptation to new threats

The Role of Cyber Threat Intelligence in TLPT

Cyber threat intelligence plays a critical role in TLPT, ensuring the simulated attacks mirror real world threats. By understanding evolving attack methodologies, testers can tailor their assessments to target your most vulnerable assets.  

Types of Cyber Threat Intelligence Used in TLPT

• Open-Source Intelligence (OSINT): Publicly available data, including domain records, corporate websites, social media, and threat databases 
• Dark Web Monitoring: Identifying leaked credentials, attack planning discussions, and threat actor activities on underground forums 
• Industry-Specific Threat Reports: Intelligence gathered from threat sharing platforms, government advisory information, and cybersecurity experts 
• Attack Surface Mapping: Understanding an organisation’s digital footprint and the known potential attack vectors available to adversaries 
• Behavioural Threat Modelling: Analysing attack patterns and known tactics, techniques, and procedures (TTPs) used by adversaries targeting the sector 

Why Cyber Threat Intelligence is Essential in TLPT

By integrating high quality, deep cyber threat intelligence, TLPT provides actionable insights that go beyond the traditional security assessments you’ve previously conducted.  

This will help to enhance your ability to defend against modern day cyber threats and comply with new industry regulations. Benefits of adding threat intelligence to your TLPT include your ability to: 

• Customise Your Attack Scenarios: TLPT ensures that tests reflect realistic threats tailored to your business and sector, and your overall risk profile 
• Improve Detection and Response: This helps security teams, either in-house or outsourced, refine your detection and response strategies to identify these increasingly sophisticated cyberattacks 
• Stay Ahead of Evolving Threats: This threat intelligence can feed into actions to keep your cybersecurity defences up to date against the latest attack methodologies used by cybercriminals 

The Growing Importance of TLPT in Financial Institutions

Why Financial Institutions Need TLPT 

Financial institutions are prime targets for cybercriminals due to the high value of customer and financial data and assets. TLPT helps to identify weaknesses in security infrastructure, ensuring you can detect, respond to, and seamlessly recover from, sophisticated cyberattacks. 

Compliance with Regulatory Requirements

Several of the new regulatory frameworks now mandate TLPT to enhance financial institutions’ operational resilience, particularly DORA (Digital Operational Resilience Act): 

• Digital Operational Resilience Act (DORA): DORA requires financial institutions to conduct TLPT a minimum of every three years to ensure operational resilience 
• TIBER-EU Framework: The EU standard for threat-led penetration testing, providing a structured approach for financial entities 
• ISO 27001 & PCI DSS: While not TLPT-specific, these frameworks emphasise the importance of regular security testing as a minimum to prevent successful breaches 

Identifying Vulnerabilities in Critical Systems

TLPT goes beyond identifying software vulnerabilities, encompassing social engineering, network exploitation, and adversary emulation. By testing across multiple attack vectors, you can gain a more in-depth view of your security posture against a variety of scenarios. 

The TLPT Testing Process: Step-by-Step 

A Threat-Led Penetration Test (TLPT) is meticulously planned to simulate your real world cyber threats while minimising any operational disruption. For financial institutions, this ensures compliance with regulatory mandates like DORA. The TLPT process follows a structured methodology to assess security vulnerabilities, measure your detection and response capabilities (often referred to as your Blue Team), and enhance your overall resilience.  

The following key phases make up the full TLPT process: 

Pre-Engagement Phase 

Before launching a simulated attack, the TLPT team must establish clear guidelines and objectives for the test. This phase ensures that both you and the testers fully understand the testing scope and rules of engagement: 

• Define Objectives: Understanding key security risks and regulatory requirements is crucial. The objectives should align with your cybersecurity strategy and compliance obligations (e.g., DORA, TIBER-EU) 
• Scoping: This involves identifying critical assets, defining testing boundaries, and selecting systems to be evaluated. The scope should include essential IT infrastructure, cloud environments, employee endpoints, and third-party integrations 
• Rules of Engagement: Establishing a set of guidelines to prevent unintended disruptions. This includes setting up reporting protocols, ensuring legal compliance, and specifying allowable attack techniques 

Intelligence Gathering (Reconnaissance) 

The reconnaissance phase involves gathering intelligence about your digital footprint and potential attack vectors. This intelligence-driven approach helps penetration testers simulate realistic threat scenarios. 

Passive Reconnaissance: Information is collected without directly interacting with you and your teams. This can include analysing: 

• Domain records and subdomains 
• Publicly available databases 
• Employee LinkedIn and social media profiles 
• Open-source security report

Active Reconnaissance: The TLPT team actively probes your networks and systems to identify vulnerabilities. This may involve: 

• Port scanning 
• Service enumeration 
• Identifying misconfigured web applications 
• Detecting exposed credentials in public repositories 

Active Testing Phase

This phase simulates real world cyberattacks by executing carefully designed attack scenarios on your networks, systems and applications. The aim is to test how well you can detect and respond to various cyber threats: 

• Advanced Persistent Threat (APT) Simulation: Using known APTs, testers mimic the behaviour of threat actors, attempting to gain initial access to your environments, establish persistence, and escalate privileges 
• Network and Application Testing: Identifying security flaws in your web applications, databases, APIs, and network infrastructure 
• Social Engineering Attacks: Simulating phishing emails, pretexting phone calls, or physical security breaches to assess your employees’ security awareness 
• Privilege Escalation and Lateral Movement: Once access to your environment has been achieved, the testers will attempt to escalate privileges and move laterally within your network, mimicking how attackers would progress after initial compromise. Zero trust models and network segmentation are the key mitigation steps here.  

Attack Simulations & Realistic Scenarios

Threat-led tests incorporate attack simulations tailored to an organisation’s risk profile. These include: 

• Insider Threat Scenarios: These assess the risk of one of your internal employees misusing access, maliciously or accidentally 
• Supply Chain Attacks: This will test for vulnerabilities in your third-party integrations. By accessing third-party integrations and dependencies, you may introduce security risks 
• Ransomware Simulations: Evaluating your response capabilities against modern ransomware attacks, including your data recovery and containment strategies 

Closure Phase: Reporting & Remediation

Once the testing phase is complete, the TLPT team consolidates its findings and collaborates with your internal security teams to take remediation steps to enhance cyber resilience. 

• Collaboration Between Red Team & Blue Team: A Purple Team exercise brings together the offensive (Red Team) and defensive (Blue Team) security teams to analyse your attack outcomes and improve detection mechanisms 
• Develop a Comprehensive Remediation Plan: By identifying security gaps, you are able to prioritise vulnerability remediation and implement corrective actions, based on your risk levels. This can include: 
  • Enhancing security awareness training 
  • Strengthening access control policies 
  • Updating your incident response procedures and stakeholders 
  • Patching vulnerabilities and improving system configurations 

Who Should Conduct TLPT? Internal vs. External Testing 

Engaging third party penetration testing experts provides a more robust and objective evaluation of your security posture. Some of the key advantages include: 

• Unbiased Assessment: External testing experts provide a fresh perspective, free from internal biases or assumptions about existing security controls 
• Advanced Attack Techniques: External teams have extensive experience in the latest tactics, techniques, and procedures (TTPs) used by malicious adversaries, ensuring the highest quality threat simulation 
• Regulatory Compliance: Many regulations, such as DORA and TIBER-EU, mandate independent third party TLPT assessments to ensure impartiality 
• Access to Specialised Expertise: External testers often have niche expertise in red teaming, social engineering, and network exploitation 
• Reduced Risk of Conflicts of Interest: Internal security teams may be reluctant to expose vulnerabilities in their own systems. We call this ‘marking your own homework’. An external team ensures an impartial and thorough security assessment 

The Role of Internal Security Teams

While external testers play a crucial role in executing TLPT and are mandated by new regulation frameworks, your internal security teams are equally important in ensuring a seamless process. Their contributions include: 

• Contextual Knowledge of Your IT Systems: Your internal teams understand your IT environment, business operations, and existing security measures, better than anyone else. This can ensure that all relevant areas are tested effectively, particularly when working in tandem with an external provider 
• Collaboration with External Testers: A joint approach ensures that external teams have access to your particular critical security intelligence 
• Real Time Monitoring and Incident Response: Your internal teams can track penetration testing activities and analyse the effectiveness of your security monitoring and alerting systems in real time 
• Remediation Steps and Security Improvements: Your internal teams should take the lead in implementing any security enhancements based on the TLPT findings, and integrating lessons learned into your ongoing cybersecurity operations 

Best Practice: Combining Internal & External Testing for Maximum Effectiveness

A hybrid approach, where your internal security teams collaborate with external penetration testing experts, offers the best of all worlds.  

This ensures: 

• An unbiased, highest quality TLPT assessment 
• Comprehensive visibility into your security gaps 
• Compliance with new regulations being introduced 
• Continuous improvement in your cyber and operational resilience 

By leveraging both internal expertise and external validation, you can ensure TLPT is as effective and beneficial as possible. 

Adhering to TLPT Technical Standards and Best Practices 

For TLPT to be effective and compliant with new regulations, your testing must adhere to established technical standards and best practices. This can include CREST and CHECK Accreditations. These frameworks ensure that testing methodologies are consistent, credible, and aligned with international cybersecurity requirements.  

Compliance with these standards enhances your organisation’s ability to meet regulatory obligations, and improve overall security resilience. 

Key Technical Standards

• TIBER-EU – The Threat Intelligence Based Ethical Red Teaming EU framework provides a structured methodology for financial institutions conducting TLPT. It ensures tests are intelligence-led, realistic, and industry-aligned 
• ISO 27001 & NIST Cybersecurity Framework – These international security standards provide best practices for integrating TLPT into broader information security management systems, ensuring a holistic cybersecurity approach 

Meeting DORA’s TLPT Requirements

DORA mandates that financial institutions implement TLPT to strengthen cyber resilience. As part of its framework, this ensures organisations can detect, respond to, and mitigate cyberattacks effectively. Adhering to these guidelines ensures your compliance with this newly introduced regulation and strengthens your resilience against cyber threats. 

• Regular Testing: DORA mandates that financial institutions conduct TLPT every three years, as a minimum, to ensure continuous assessment and improvement of your cyber defences 
• Mutual Recognition: As part of this new regulation, TLPT results should be shared across jurisdictions to facilitate collaboration and streamline compliance efforts among financial entities 

How Often Should TLPT Be Performed?

While DORA requires TLPT every three years, organisations in high-risk industries such as finance, healthcare, and critical infrastructure should really consider conducting tests annually or biannually as a minimum.  

Testing should be conducted whenever a system or network is migrated, updated or patched. Regular testing ensures you stay a step ahead of evolving cyber threats, adapt your cyber protection to stop emerging attack techniques, and maintain a strong security posture. 

Future Trends in Threat-Led Penetration Testing 

As cybercriminal tactics evolve, TLPT methodologies must adapt. Trends include: 

Evolving Cyber Threats 

• AI-driven attacks that automate sophisticated cyber intrusions 
• Increased targeting of supply chains and third-party vendors 

Automated TLPT Tools

Emerging automation tools enable organisations to conduct continuous adversary simulations, however for a true TLPT you must enlist the support of a specialist testing provider. Automated tooling doesn’t have the capability to conduct TLPT to the level needed for compliance.  

Expanding TLPT Beyond Financial Services

While TLPT is a regulatory requirement for financial institutions, sectors such as healthcare, retail, and government are increasingly adopting this approach to strengthen their cyber resilience and overall operational resilience. 

Conclusion: Strengthening Cyber Resilience with TLPT 

TLPT is a critical component of modern cybersecurity strategies, providing you with a realistic assessment of your cybersecurity defences. By integrating threat intelligence, regulatory compliance, and advanced adversary simulations from expert cybersecurity service providers, you can stay ahead of cyber threats and protect your critical assets.  

Whether mandated by DORA for financial institutions or implemented as a proactive security measure, TLPT ensures you’re prepared for the most sophisticated cyberattacks. 

Next Step: If your organisation is looking to implement TLPT, consider partnering with experienced cybersecurity experts like DigitalXRAID to ensure a comprehensive, intelligence led security assessment. Get in contact with DigitalXRAID experts to see how we can support your Threat-Led Penetration Testing needs.