Even if you don’t know your security gaps, someone else does
Cyber attacks don’t start with a warning. And cyber attackers don’t care how busy you are. If you haven’t tested your defences recently, it’s possible you’re already exposed and you might not realise until it’s too late.
Security assessment and testing help you uncover potential vulnerabilities before attackers do. It’s not just best practice – it’s a business-critical priority.
Know where you stand
You can’t fix what you can’t see. A security assessment provides a clear and honest picture of your current risk. Our thorough assessments can help you to:
Identify vulnerabilities across systems, software and processes
Review your policies and controls against industry standards and regulations
Spot misconfigurations that could be quietly weakening your defences
Understand your risk exposure and what it could cost you
Put your security to the test
Penetration testing
Grey/white box testing: Simulate attacks with partial system knowledge.
Black box testing: Simulate external threats with no prior access.
Code review-based testing: A deep-dive analysis of your application source code.
Red, blue and purple teaming
Strengthen your cyber resilience through simulated attacks (red), real-time defence (blue) and collaborative threat response (purple) to improve detection and response capabilities.
TIBER (Threat Intelligence-Based Ethical Red teaming) and threat-led penetration testing
Intelligence-driven testing aligned with regulatory frameworks like DORA and NIS2.
Social engineering
Phishing and manipulation simulations to test human defences.
Teaming scenarios in action
| Scenario | Teaming Model | Sector | Objective |
|---|---|---|---|
| Simulated ransomware attack on critical infrastructure | Red teaming | Energy | Test incident response and recovery |
| Live-fire phishing and credential harvesting | Purple teaming (Red + Blue) | Financial services | Evaluate user awareness and SOC detection |
| Collaborative threat simulation during product launch | Purple teaming | E-commerce | Secure CI/CD pipeline and cloud assets |
| TIBER-aligned threat-led testing | Red teaming | Banking | Meet regulatory requirements (e.g. DORA, NIS2) |
| Insider threat simulation | Purple teaming | Healthcare | Assess internal access controls and monitoring |
Use case spotlight: Purple teaming to bridge internal gaps
Client challenge
A global financial services client had a small internal red team but lacked the resources to run full-scale adversary simulations. Their blue team was strong on detection but had limited exposure to offensive tactics.
Resillion’s solution
We deployed a purple teaming engagement that paired our red team specialists with the client’s blue team analysts. Over a four-week sprint, we ran iterative attack simulations ranging from phishing payloads to lateral movement. While this took place, we coached the blue team in real-time on detection and response strategies.
Outcomes
- Reduced mean time to detect (MTTD) by 43%
- Improved SOC alert tuning and rule coverage
- Delivered a reusable playbook for future internal purple team exercises
- Strengthened collaboration between security and IT operations
This engagement helped the client mature their cyber defence posture without needing to scale their internal red team
Why this matters right now
Cyber threats are constant. Regulations are tightening. And customers are paying attention. If you’re not actively testing your security, you’re gambling with your data, your reputation and your business.
Security assessment and testing help you:
- Stay ahead of attackers
- Prove compliance with confidence
- Strengthen your incident response
- Build trust with your customers and stakeholders
Let’s talk. We can help you find the gaps, fix the risks and take back control.
Security assessment
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Frequently asked questions (FAQs)
What is the difference between red, blue and purple teaming?
Red teams are dedicated to penetration testing, attempting to attack systems and identify vulnerabilities. Blue teams focus on security implementation and monitoring. For instance, a SOC and even IT staff could be considered part of the blue team. A purple team rarely exists as a standalone entity and is typically used to describe collaboration between blue and red teams – helping to improve response and effectiveness.
Is penetration testing required for compliance in the UK?
Yes. Frameworks like ISO 27001, NIS2 and GDPR recommend or require regular penetration testing to ensure data protection and system integrity.
What is TIBER testing and who needs it?
TIBER (Threat Intelligence-Based Ethical Red teaming) is a framework developed by the European Central Bank. Financial institutions and critical infrastructure providers primarily use it to test resilience against sophisticated cyber threats.
How often should penetration testing be conducted?
We recommend annual testing and testing after significant changes to your infrastructure, applications or compliance requirements.
Do you offer services across the UK and Europe?
Yes. Our cyber security teams operate across the UK and Europe, delivering services tailored to local regulations and industry needs.
Device Security Testing Service
Our experts are ready to streamline your pathway to robust compliance with device security legislation, giving you confidence that your organisation is protected from the consequences of non-compliance.
Adversarial Attack Simulation
Take a holistic approach to your cyber security and test every element of your organisation, leaving no stone is left unturned. Our experts will simulate a real-world attack, highlighting any vulnerabilities, and provide remediation advice to leave you secure.
Cloud Security Assurance
Assess your cloud infrastructure for exploitable risks and vulnerabilities that allow a hacker unauthorised access to your organisation.
Radio Equipment Directive
From 1st August 2024, all new and existing products placed on the EU market under the scope of the Radio Equipment Directive (RED) must comply with new cyber security requirements. Ensure your products are compliant today.
Operational Technology Testing
Maximise the expertise of our consultants and protect the integrity and availability of your network-connected systems with regular testing.
Application Security Testing
Applications, web, mobile, and APIs, are an integral part of daily life. Ahead of production, understand your level of business risk and ensure your apps are built correctly and integrate with their intended operating system, without leaving you vulnerable.
Security Hardening
Be confident that you are compliant, in line with industry best practice, and know you’re resilient to any attacks.
API Security Testing
There’s an API for everything – identify and prevent any vulnerabilities before anyone else and mitigate your organisational risk.
Secure Code Review
Resillion examines your source code to identify any inconsistencies and weaknesses that make you susceptible to an attack, assuring your application’s logic and business code is secure.
Network Security Testing
One vulnerability is all it takes to compromise your systems – Resillion uses real-world methodology, tools, and techniques to look for weaknesses in services, poor configuration, and weak credentials that lead to compromise. Protecting your network is your first line of defence.
IoT Security Assurance
Secure your IoT devices, removing any exploitable vulnerabilities that allow hackers access to and manipulation of your network and data.
Remote Access & MDM Solutions Security
Regularly review your device policies to keep up with the changing threat landscape and maintain your corporate security. Utilise tools and features that centrally manage devices, automatically patching vulnerabilities and upgrading software, tracking and govern installed software, adjusting a device's configuration to a setting dictated by a particular standard policy, as well as forcing users to change their passwords at regular intervals.
Ready to take action?
Book a free consultation today.
We’ll assess your current security posture, identify your most urgent risks and help you build a testing strategy that’s right for your business.
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