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Will KellerMarch 04, 20254 min read

Red Team Testing: Why Test as if a Hacker Is Already in Your Network?

Red Team Testing: Why Test as if Hackers Are Inside | SBS
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Cyberattacks have become certain, compelling organizations to rethink their approach to cybersecurity. Traditional penetration tests focus on blocking and preventing known threats at the perimeter, but penetration tests seldom explore what occurs after the initial breach. Red team testing fills this gap by simulating that an attacker has already gained access to your systems and is now moving through your network to gain access to sensitive data. A proactive testing method such as red team testing allows organizations to develop response strategies, expose internal vulnerabilities, appraise defenses, and bolster their team’s response readiness.

 

What Is Red Team Testing?

The premise of red team testing is that an attacker has already bypassed perimeter defenses. Rather than evaluating preventive external security measures, the focus is on inward vulnerabilities to identify potential ways attackers can extend the depth of the attack, identify new systems, steal data, or disrupt operations. High-value targets (HVTs) such as Social Security or account numbers stored within your systems are prioritized. By using post-breach simulations such as red team testing to evaluate an organization’s detection capabilities and response readiness, the goal is twofold:

  1. To determine the extent of damage an attacker could inflict post-initial breach
  2. To evaluate an organization’s ability to detect and respond to such activities

 

By simulating post-break test scenarios, the testing methodology provides a more realistic view of your network’s resilience and your team’s preparedness.

 

Why Is Red Team Testing Important?

Red team testing is a valued testing method since it supplements traditional penetration testing by demonstrating what an attacker can do with access to your systems. Thus, it prepares your organization to face the reality of modern cyberattacks, which include data theft and system destruction. 

Modern cyberattacks, turbocharged by advances in artificial intelligence, are more sophisticated than ever while still leveraging traditional techniques such as:

  • Phishing: Tricking users into revealing sensitive information
  • Compromised credentials: Exploiting stolen passwords
  • Insider threats: Disgruntled employees with access to critical systems

 

By proactively addressing these cyber threats ahead of an actual attack, red teaming enables organizations to identify and secure critical vulnerabilities, improve monitoring systems, and strengthen incident response capabilities. Proactively addressing weaknesses reduces the potential impact of real-world breaches and ensures your team is experienced and ready to respond when it matters most.

 

How Does Red Team Testing Work?

 

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The red team testing process typically includes the following stages:

 

1. Open-Source Intelligence

The first phase of red team testing focuses on gathering publicly available information about the target organization from resources that criminals use. This involves conducting thorough outside reconnaissance without direct interaction with the network. By analyzing open-source data, such as company websites, social media profiles, and domain records, the SBS testing team can uncover valuable insights to help craft a more targeted and effective attack strategy.

 

2. Initial Attack

Once the necessary intelligence is gathered, the team executes the initial attack. This phase simulates a breach using various tactics, including social engineering, phishing attempts, and vulnerability scanning. The goal is to gain an initial foothold within the organization, often by exploiting weak points in security systems or tricking users into revealing sensitive information.

 

3. Persistent Attack

In this phase, like a real hacking team, we build on the initial successes by expanding our access. Using techniques such as privilege escalation and lateral movement, we move deeper into the network, gaining higher levels of access and spreading throughout the environment. This stage tests how well an organization can detect suspicious activity, contain actions, and respond to an attacker who is already inside.

 

4. Reporting

The final phase involves delivering a detailed report highlighting the strengths and weaknesses identified during the test. This includes a comprehensive analysis of how the red team successfully penetrated defenses, areas where vulnerabilities exist, and recommendations for improving security posture. The report provides a clear roadmap for enhancing internal defenses and response mechanisms.

 

Benefits of Red Team Testing

Through its focus on real-world attack scenarios, red team testing reveals critical insights beyond the scope of a traditional penetration testing engagement. These insights translate into three key benefits that help organizations fortify their internal defenses and improve overall resilience.

 

Enhanced Incident Detection and Response

Red team testing reveals how well your organization can detect and respond to internal threats, highlighting blind spots in monitoring tools and gaps in incident response workflows.

 

Strengthened Internal Security

This testing method uncovers vulnerabilities that traditional penetration tests often miss, such as over-permissioned accounts, unsecured service accounts, and weak network segmentation.

 

Proactive Risk Mitigation

Simulating realistic attack scenarios in a controlled environment allows organizations to identify and fix vulnerabilities before they are exploited.

By adopting an attacker’s perspective, red team testing equips your organization with the insights needed to identify vulnerabilities, improve detection, and strengthen internal defenses, ensuring better preparedness in a complex threat landscape.

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Will Keller

Will Keller is a Network Security Engineer at SBS CyberSecurity with more than 12 years of IT experience, with a specialized focus on cybersecurity for 4 years. Before joining the SBS team in 2022, Will held Cybersecurity Specialist, System Administrator, Tier 2 System Administrator, and IT Consultant roles. He received his Bachelor of Science from the University of Louisiana at Lafayette and maintains the CompTIA Security+ certification.

Will is passionate about helping make cybersecurity less daunting and more tangible for his clients so they can achieve and maintain a higher level of security practice and awareness than they could on their own. He believes in articulating the needs behind security in a way that makes sense to everyone he works with.

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