Published: 2026-04-15
What Is Red Teaming?
A complete guide to red team exercises, how they differ from penetration testing, and why mature organisations rely on them to validate their defences.
Red Teaming Definition
Red teaming is a goal-oriented security assessment in which a dedicated team of offensive-security professionals simulates real-world adversaries to test an organisation's detection, response, and prevention capabilities. Unlike a standard penetration test that catalogues as many vulnerabilities as possible, a red team exercise focuses on stealth, persistence, and achieving specific objectives—such as accessing the crown jewels—exactly as a sophisticated attacker would.
The term originates from military war-gaming, where the 'red team' plays the role of the enemy while the 'blue team' defends. In cybersecurity, red teaming puts every layer of your security programme to the test: people, processes, and technology. The engagement is typically unknown to the internal security team (with the exception of a small trusted group), creating a realistic measure of how quickly—and whether—your organisation can detect and contain a breach.
Red team assessments are governed by frameworks such as TIBER-EU, CBEST, and MITRE ATT&CK. At HackersHub our operators hold OSCP, OSCE, and CRTO certifications and follow these frameworks to deliver reproducible, regulation-aligned results.
Red Teaming vs Penetration Testing
One of the most common questions we hear is 'what is the difference between red teaming and a pentest?' The table below highlights the key distinctions.
| Criterion | Penetration Test | Red Team Exercise |
|---|---|---|
| Objective | Find as many vulnerabilities as possible | Achieve a specific goal (e.g., data exfiltration) |
| Scope | Defined systems or networks | Entire organisation including physical and human factors |
| Approach | Systematic and methodical | Covert, adversary-simulation |
| Duration | 1–4 weeks | 4–12 weeks or continuous |
| Stealth | Not required | Core requirement—avoid detection |
| Blue team aware? | Usually yes | No (except trusted agent) |
| Best for | Vulnerability discovery & compliance | Validating detection & incident response |
What Happens During a Red Team Exercise?
1. Reconnaissance
Our operators gather open-source intelligence (OSINT) about your organisation—employees, technology stack, physical locations, and supply-chain relationships—to craft realistic attack scenarios.
2. Initial Access
Using phishing, social engineering, physical intrusion, or technical exploits, the team attempts to gain an initial foothold inside the organisation without triggering alarms.
3. Privilege Escalation & Lateral Movement
Once inside, the team escalates privileges and moves laterally across systems, mimicking the techniques used by advanced persistent threats (APTs).
4. Persistence & Evasion
Implants and command-and-control channels are established while actively evading EDR, SIEM, and SOC monitoring—testing your blue team's detection capability in real time.
5. Objective Completion
The team works toward pre-defined objectives such as accessing sensitive databases, exfiltrating data, or disrupting a critical business process—providing tangible proof of impact.
6. Reporting & Purple-Team Debrief
A comprehensive report details every tactic, technique, and procedure (TTP) used, a timeline of actions vs. detections, and prioritised remediation recommendations. A joint debrief with your security team turns findings into improvements.
Who Needs Red Teaming?
Red teaming is not for every organisation. It delivers the most value when you already have foundational security controls in place and want to pressure-test them under realistic conditions.
- Financial institutions subject to TIBER-EU, DORA, or CBEST requirements
- Critical-infrastructure operators (energy, telecom, healthcare) with regulatory mandates
- Enterprises with a dedicated SOC or managed-detection-and-response (MDR) programme
- Organisations that have completed multiple penetration tests and want the next level of assurance
- Companies preparing for ISO 27001, NIS2, or SOC 2 Type II certification
- Boards and CISOs seeking an objective, evidence-based measure of security maturity
Red Team Assessment Deliverables
Every HackersHub red team engagement includes:
Ready to Test Your Defences?
Our OSCP- and CRTO-certified operators have conducted red team exercises for banks, government agencies, and Fortune 500 enterprises across Europe. Let us show you what a real adversary could achieve.
Frequently Asked Questions
How long does a red team exercise take?
Most engagements run between 4 and 12 weeks, depending on scope and objectives. Highly targeted scenarios with narrow objectives may take as little as 3 weeks, while full-scope assessments including physical intrusion can last several months.
What is the difference between red teaming and blue teaming?
The red team plays the attacker, simulating real-world threats to probe your defences. The blue team is your internal security operation—SOC analysts, incident responders, and threat hunters who detect and contain those attacks. A purple-team exercise combines both to maximise learning.
How much does a red team assessment cost?
Pricing depends on scope, duration, and objectives. A focused scenario targeting a single objective typically starts around €25,000, while a comprehensive TIBER-EU engagement can exceed €100,000. Contact us for a tailored quote based on your specific requirements.
Do we need to have done a penetration test first?
We strongly recommend it. Red teaming assumes your organisation has baseline security controls. If fundamental vulnerabilities have not been addressed, a penetration test is more cost-effective. We can advise you on the right starting point during a free scoping call.
Will the red team exercise disrupt our business operations?
No. Engagements are carefully scoped with rules of engagement that define boundaries. A trusted agent within your organisation coordinates with our team to prevent any unintended impact on production systems.
What frameworks do you follow?
We align our methodology with TIBER-EU, CBEST, MITRE ATT&CK, and the Cyber Kill Chain. This ensures reproducible results that satisfy regulatory requirements across the EU.
What is a purple team exercise?
A purple team exercise is a collaborative session where our red team and your blue team work together in real time. We replay attack techniques while your defenders tune detection rules, close gaps, and validate fixes—maximising the value of every finding.
Can red teaming include physical and social-engineering attacks?
Yes. Many of our engagements include phishing campaigns, vishing (voice phishing), physical access attempts, and even USB drop attacks. Real adversaries use multi-vector approaches, so your assessment should reflect that reality.