What Is Red Teaming?
Red teaming is the controlled simulation of attacks and failure scenarios to identify vulnerabilities and risks.
What is this guide about?
This article examines the strategic depth of offensive cybersecurity. We show how modern attackers operate (the Cyber Kill Chain), where the difference to classic penetration testing lies, and why in-house IT departments inevitably fail at this type of stress test.
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Many organizations feel secure because they have invested heavily in advanced technologies. What was expensive must be good – or is it?
The reality is unforgiving: while attackers often need only a few days after an initial compromise to move laterally through a network undetected, the average time to remediate critical deficiencies and security gaps at many companies exceeds 70 days. To close this severe gap, red teaming has established itself as the gold standard of proactive cybersecurity.
A professional red team does far more than run a technical IT test. It is a comprehensive, targeted, adversarial simulation. Its stated goal is to put an organization's actual resilience, as well as its defenders' response capabilities, to the test under the most realistic conditions possible. Unlike automated scans, which merely assess the theoretical state of IT systems, a red team delivers factual proof of whether an attacker can reach and compromise the so-called „Crown Jewels“ – the company's most business-critical assets.
In corporate practice and budget planning, the terms penetration testing (pentesting) and red teaming are often mistakenly used as synonyms. Although both approaches share the common goal of improving a company's cybersecurity and overall security posture, they differ fundamentally in their orientation. Penetration tests tend to be more direct and visible to the company. A red team, by contrast, operates primarily covertly. A thorough understanding of this distinction is essential for allocating security budgets:
| Dimension of Analysis | Penetration Testing (Pentest) | Red Team Activities |
|---|---|---|
| Primary Objective | Identification, exploitation, and comprehensive documentation of as many technical vulnerabilities as possible within a defined system. | Assessment of the organization's overall detection and response capability (people, process, technology) under real-world attack conditions. |
| Test Scope | Narrowly defined and strictly limited (e.g., a security review of five specific web applications or a particular cloud network segment). | Holistic and comprehensive; covers the entire organization, including cloud services, physical security, IoT devices, and social engineering. |
| Defenders' Awareness | The internal security team (blue team) is typically informed of the test period, scope, and participants involved. | Unannounced (covert); the blue team operates under normal conditions and is unaware that a test is taking place. Only a small circle of senior executives is informed. |
| Engagement Duration | Short-term, often completed within days to a few weeks. | Long-term in nature, typically spanning several weeks to months (e.g., 8 to 12 weeks) to realistically simulate stealth tactics and persistence. |
| Tactical Approach | Systematic and methodical (e.g., working through the OWASP Top 10); heavy use of automated tools and scanners. | Opportunistic, goal-oriented, and adaptive; takes the path of least resistance using custom malware and C2 infrastructure. |
| Type of Outcome | A diagnostic, often very long list of technical flaws with specific remediation instructions (a patch list). | A strategic assessment of cyber resilience that reveals procedural flaws, blind spots in monitoring, and validates incident response. |
Table of contents
- The Hacker Color Scheme: White Box, Grey Box, and Black Box
- The Methodology Behind a Red Team Assessment
- Why In-House Red Teamers Often Fail at Testing
- The Economic Cost Trap: Why In-House Departments Blow Budgets
- Regulation as a Driver: DORA and Threat-Led Testing
- TIBER-EU in Practice: The Process of a Regulated Assessment
- Holistic Security Solutions for Complex Attacks
- Red Teaming as a Service (RTaaS): The Paradigm of Continuity
- Putting AI Security to the Test
- Economic Efficiency and Measurable ROI
To better classify the different testing methods, it helps to look at the tester's level of information. In a white-box test, the tester has full knowledge of the architecture and sometimes even administrator rights. This saves time but doesn't simulate a genuine hacker attack. A grey-box test gives the tester basic information, comparable to the access rights of a normal employee (e.g., standard login credentials). An authentic red team assessment, however, operates primarily from a black-box perspective – the attacker starts with no prior knowledge and must gather every piece of information independently.
A professional assessment carried out by external security experts is not unplanned hacking. It follows a strictly structured cycle closely aligned with established frameworks such as Lockheed Martin's Cyber Kill Chain or MITRE ATT&CK. This methodical testing ensures that operations run realistically without endangering normal business operations.
To model a real hacker attack as realistically as possible, professional red teamers follow a clear choreography. Red teaming covers the entire Cyber Kill Chain. The simulated attack comprehensively covers the following phases:
Reconnaissance: The red team maps the company's attack surface and gathers open-source intelligence (OSINT) beforehand.
Initial Access The experts get a foot in the door – usually by using targeted spear-phishing, compromising unpatched VPN gateways, or exploiting misconfigured perimeter systems.
Persistence & Privilege Escalation: The team sets up a disguised command-and-control (C2) infrastructure and deliberately escalates its own user privileges up to domain administrator level (for example, using techniques such as Kerberoasting).
Lateral Movement: The red teamers move sideways through the target network undetected in order to reach the previously defined assets (the so-called crown jewels).
Objective Simulation & Exfiltration: Rather than actually stealing data, at this stage the red team merely provides proof (a proof of concept) that it has gained control over critical systems.
While vulnerability management often focuses solely on software flaws, the red team looks for the path of least resistance. Surprisingly often, that path leads through people. Social engineering is therefore an integral part of the attack simulation. Systematic scanning of social media profiles helps identify key employees. This is followed by precisely tailored phishing attacks with highly personalized pretexts (pretexting), or vishing attacks (phone-based manipulation of the IT help desk). Even physical attack vectors play a role: tailgating (slipping unnoticed through secured doors) or deliberately planting compromised USB drives in the company parking lot are part of the standard repertoire.
While the red teamers move through the network, the moment of truth arrives for the defenders. Such a simulation ruthlessly reveals where security solutions are effective and where attack detection fails completely. Does the blue team notice that someone is active in the network? Are alerts correctly triggered in the SIEM (Security Information and Event Management), or do they get lost in the noise of daily warnings? If the red team notices close monitoring, it dynamically adapts its behavior and chooses a less conspicuous path.
The purpose of the operation is by no means to humiliate the company's own IT department. After the test, strategic reporting takes place in what is known as a purple team debriefing. Here, red and blue merge. Through direct contact in a joint workshop, the entire attack is meticulously reconstructed. The blue team learns firsthand why certain firewall rules could be bypassed and where detection gaps exist. This collaborative approach maximizes the learning effect and transforms a theoretical report into immediately implementable, highly effective countermeasures.
Many companies, particularly larger mid-sized firms, fall under the illusion of internal security. They believe their loyal IT department has sufficient skills and can objectively attack its own networks. This is a dangerous fallacy. For well-founded psychological and structural reasons, internal IT teams regularly fail to realistically take on the role of an advanced threat actor.
Why does a company's own team often fail to see the forest for the trees? The strongest argument against a team of internal testers is psychological operational blindness. An in-house administrator inevitably starts the test with white-box knowledge: they know the architecture inside and out and know exactly where Active Directory sits. Their confirmation bias subconsciously leads them to avoid exactly the attack vectors they know they recently patched. An external red teamer, by contrast, approaches the network with the analytical coldness of a real criminal. For them, there are no internal mental taboos. Through this uncompromising, out-of-the-box thinking, they empirically search for the path of least resistance.
When internal IT is tasked with this work, an unsolvable conflict of interest arises („grading your own homework“). Employees are effectively being asked to sabotage their own work and expose these mistakes to the board. Fear of internal tension usually leads to an unconscious „watering down“ of the tests. In addition, hacking requires a destructive, hostile mindset (an adversarial mindset), while the IT department is trained for stability, patch management, and uptime.
Even if a company wants to build its own, isolated red team, the economic hurdles are enormous. The job market for offensive security specialists is extremely competitive. Ongoing recruitment, continuous training, and the acquisition of expensive specialized attack frameworks (such as Cobalt Strike) as well as commercial threat intelligence feeds all create immense fixed costs.
An external provider such as neonotu spreads these infrastructure and training budgets across a large number of clients and can deploy top talent far more cost-effectively.
The strategic importance of these offensive tests has long been underscored by regulators. Regulation (EU) 2022/2554, known as the Digital Operational Resilience Act (DORA), establishes a framework for ICT risk management in the European financial sector. DORA explicitly obligates specific companies in the financial industry to carry out advanced security testing in the form of Threat-Led Penetration Testing (TLPT). This elevates the assessment from a voluntary best practice to a legal requirement.
To seamlessly manage these regulatory requirements and the resulting test results in daily operations, modern security strategies rely on centralized management platforms. With our portal Sightadel we offer exactly this kind of digital workbench. IT managers and CISOs get a dynamic cockpit here to build and continuously maintain their ICT risk management as well as an ISO 27001-compliant ISMS in a targeted way. The constant search for scattered information becomes unnecessary, since the platform centrally consolidates all security-relevant data. The system continuously assesses the organization's own risk profile via an integrated security score and makes vulnerabilities visible in real time – at no additional cost. In this way, what is often tedious compliance documentation is transformed into a transparent control unit that makes your cybersecurity demonstrably measurable and manageable.
Methodologically, DORA builds on the European Central Bank's TIBER-EU framework (Threat Intelligence-based Ethical Red Teaming), which is implemented in Germany as TIBER-DE. The process requires coordination among various stakeholders:
- Preparation & Scoping: Formation of an isolated internal white team (control team), the only body within the company that is informed.
- Threat Intelligence An independent provider produces a targeted threat intelligence report that profiles the relevant adversaries and their tactics.
- Red Teaming Test: Covert execution of the attack against live systems, subject to strict abort criteria.
- Closure & Purple Team: Joint analysis of detection gaps together with the previously uninformed blue team.
The legislation also stipulates that, when internal capacities are used, at least every third TLPT test must be conducted entirely by an external provider, in order to rule out any conflicts of interest.
Cybercriminals think in attack paths, not in silos, so they combine disciplines. An attacker might steal a password over the phone, log in through an outdated VPN, or exploit an overlooked misconfiguration in cloud applications. Red teaming sheds light on exactly these interdisciplinary interfaces and reveals systemic vulnerabilities that purely technical scanners inevitably miss. This provides management with undeniable evidence of a genuine need for action and strengthens security culture across the whole organization.
The biggest weakness of conventional cybersecurity approaches is that they only capture security risks at a single point in time. A penetration test shows the state of an IT environment at one specific moment – but not how the attack surface changes in the days and weeks that follow. Because modern IT landscapes are constantly changing, one-off test results quickly lose relevance. With „Red Teaming as a Service“ (RTaaS), neonotu replaces this static approach with continuous security validation. The subscription model includes:
Monthly Attack Simulations: Realistic, focused simulations based on up-to-date threat intelligence.
Quarterly Penetration Tests: In-depth, methodical analyses of the entire infrastructure.
Tailored Training: Specific training programs to turn employees into a human firewall.
Smart systems play an increasingly important role in modern networks. Integrating AI security into threat detection is promising, but it also gives attackers new, unconventional vectors. Our experts combine creative human hacker intelligence with proprietary tools to develop highly complex exploits that evade modern EDR solutions and test the true quality of the defenses.
Moving from one-off security projects to neonotu's continuous RTaaS model enables a predictable, sustainable, and cost-effective improvement in security posture. Instead of isolated, time-limited assessments, companies benefit from ongoing validation of their protective measures and continuous assessment of new risks.
The insights gained are immediately integrated into existing security processes: they support strategic direction via the Virtual CISO and, at the same time, improve the detection and response capability of a fully managed SOC. This creates a closed loop of attack simulation, analysis, optimization, and monitoring.
In a real incident, an instant response service ensures an immediate reaction to security events and helps effectively limit the impact on operations, data, and reputation.
Take Contact to sustainably strengthen your cyber resilience and, through continuous improvement, take it to a new level in the long term.
What exactly is the difference between penetration testing and red teaming?
Penetration tests are highly limited and diagnostic; they methodically search for technical flaws within a narrowly defined focus. A red team assessment is holistic, goal-oriented, and opportunistic. It operates covertly and tests the entire company under realistic conditions to see how the defenders (blue team) respond in a real scenario.
Do red team operations endanger our live IT systems or data security?
No. Professional red teams operate under strict abort criteria (kill-switch mechanisms) to consistently avoid operational damage to live systems. Although the fundamental feasibility of data exfiltration is demonstrated, sensitive customer information or assets are never actually copied to external networks, for both legal and security reasons.
Why shouldn't our own IT department conduct this assessment?
Internal staff inevitably suffer from psychological „operational blindness“ (confirmation bias) and face a strong structural conflict of interest. They are trained to build and defend networks, not to tear them down. The highly specialized know-how, the hostile hacker mindset, and the use of custom attack frameworks are typically found only in specialized external teams.
Does social engineering really play such a big role in these tests?
The importance of the human factor is frequently underestimated. While technical safeguards are continuously improved, attackers deliberately look for the easiest way into a company – and that path often runs through employees. That's why our simulations include realistic phishing attacks, vishing campaigns, and physical access tests. The results reveal where security awareness and processes can be improved, laying the groundwork for more effective awareness training and a more resilient security culture.
Does our organization need to comply with regulatory requirements like DORA?
DORA (Digital Operational Resilience Act) is legally binding for the entire European financial sector as well as its critical ICT third-party providers. The companies in scope are legally required to conduct Threat-Led Penetration Testing (TLPT) on their live systems at least every three years. External, intelligence-driven assessments reliably ensure the required compliance in this area.
What is the advantage of „Red Teaming as a Service“ (RTaaS) over classic pen tests?
The IT landscape and adversary tactics change at a rapid pace. A single, point-in-time test becomes outdated extremely quickly. RTaaS solves this problem with a subscription model featuring high-frequency monthly attack simulations and quarterly penetration tests. This delivers continuous insights, immediately uncovers weaknesses in newly deployed systems, and sustainably improves defense quality under predictable, plannable conditions.
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+41 44 586 94 00
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