Understanding Red Teaming

Even the most well-protected organizations can have blind spots—unknown vulnerabilities, misconfigurations, or overlooked attack vectors. Red teams uncover these weaknesses by mimicking the behavior of sophisticated adversaries.

Example: A red team might discover that an organization’s segmented network has a misconfigured VPN gateway, allowing lateral movement between supposedly isolated systems.

Security tools and policies are only effective if they work under real-world conditions. Red teaming validates the effectiveness of an organization’s defenses, including firewalls, intrusion detection systems, endpoint protection, and security information and event management (SIEM) systems.

Example: A red team might use custom malware to bypass an organization’s endpoint detection and response (EDR) solution, revealing gaps in threat detection.

A major component of red teaming is testing an organization’s ability to detect and respond to attacks. By simulating breaches, red teams provide valuable insights into how well incident response teams and processes function under pressure.

Example: During a red team engagement, the organization’s security team detects suspicious activity but takes several hours to isolate the compromised system. This delay highlights the need for streamlined response protocols.

Red teams are designed to emulate sophisticated adversaries, such as advanced persistent threat (APT) groups or cybercriminal gangs. This allows organizations to prepare for high-impact attacks that could disrupt operations or compromise sensitive data.

Example: A red team might simulate a ransomware attack, testing how well the organization can detect, contain, and recover from the threat.

Certain regulations and industry standards, such as TIBER-EU, PCI DSS, and ISO 27001, recommend or require regular red team exercises to validate an organization’s security posture.

Example: A financial institution conducts a red team engagement as part of a TIBER-EU exercise, ensuring compliance with regulatory expectations while gaining actionable insights.

The red team begins by gathering intelligence about the target organization. This might include identifying publicly accessible systems, researching employees on social media, and scanning for vulnerabilities.

Goal: Understand the organization’s digital footprint and identify potential entry points.

In this phase, the red team attempts to gain access to the organization’s network or systems. Techniques may include phishing emails, exploiting software vulnerabilities, or leveraging stolen credentials.

Goal: Breach the organization’s defenses and establish a foothold.

Once inside the network, the red team seeks to move laterally, exploring systems and escalating privileges to access high-value assets.

Goal: Simulate an attacker’s efforts to navigate the network and reach critical resources.

The red team establishes mechanisms to maintain access over time, such as creating backdoors or leveraging misconfigurations.

Goal: Emulate an attacker’s ability to remain undetected within the network.

The red team simulates actions that would cause harm, such as stealing sensitive data or encrypting systems in a ransomware scenario.

Goal: Test the organization’s ability to detect and respond to malicious activity.

After completing the engagement, the red team provides a detailed report outlining their findings, including:

• Vulnerabilities exploited.
• Attack paths used.
• Recommendations for remediation.

Goal: Deliver actionable insights to strengthen the organization’s defenses.

Red teaming provides a clear, realistic picture of how well an organization’s defenses would hold up against a determined attacker. Unlike automated tools, which focus on theoretical risks, red teams simulate actual attack scenarios.

Benefit: Organizations gain a deeper understanding of their strengths and weaknesses, enabling them to prioritize improvements.

By simulating advanced attacks, red teams test the effectiveness of an organization’s monitoring and response capabilities. This helps improve detection rates, response times, and overall resilience.

Benefit: Faster, more effective responses to real-world threats.

Red team exercises often include social engineering scenarios, such as phishing campaigns or pretexting. These tests reveal how employees respond to potential attacks, highlighting areas for improvement in security awareness training.

Benefit: A more security-conscious workforce.

Organizations invest heavily in cybersecurity tools and processes, but it can be challenging to measure their effectiveness. Red teaming validates these investments by testing how well they perform under real-world conditions.

Benefit: Assurance that resources are being allocated effectively.

Red teams uncover vulnerabilities and misconfigurations before malicious actors can exploit them. This proactive approach reduces the likelihood of breaches and minimizes potential damage.

Benefit: A stronger security posture that stays ahead of emerging threats.

Many regulations and standards recommend or require red team exercises as part of a comprehensive cybersecurity program. These engagements demonstrate due diligence and help organizations meet compliance obligations.

Benefit: Simplified regulatory reporting and reduced risk of non-compliance penalties.

Red team engagements result in detailed reports that include customized recommendations for addressing vulnerabilities. These insights are often more actionable and relevant than the outputs of automated tools.

Benefit: Clear guidance for improving security based on real-world findings.

A bank conducts a red team exercise to test its defenses against a sophisticated phishing campaign. The red team successfully compromises an employee’s email account and uses it to access customer financial records.

Outcome: The exercise reveals weaknesses in email security and employee awareness. The bank implements two-factor authentication and updates its security training program.

A healthcare organization hires a red team to simulate a ransomware attack. The red team encrypts critical patient records, testing the incident response team’s ability to detect and mitigate the attack.

Outcome: The exercise highlights gaps in backup procedures and response protocols. The organization invests in automated backup solutions and conducts regular incident response drills.

A red team is engaged to test a manufacturing company’s physical and digital security. The team gains physical access to a factory by posing as contractors and installs malware on a networked device.

Outcome: The exercise exposes weaknesses in access control policies and physical security measures. The company strengthens its badge system and trains staff to verify contractor credentials.

Red team engagements can be resource-intensive, requiring skilled professionals, time, and financial investment. However, the insights gained often justify the expense.

Simulated attacks may disrupt business operations if not carefully planned and executed. Organizations should work with experienced teams to minimize risks.

Effective red teaming requires deep technical expertise and knowledge of real-world attack methods. Organizations should ensure they work with qualified and experienced professionals.