An Excerpt from the S3 Security Whitepaper, “Penetration Testing for the Next Generation of Cyber Attacks”
Traditional penetration testing focused primarily on corporate networks, internal systems, and web applications. But while these areas remain critical, today’s enterprise environments have evolved significantly – forcing most organizations to expand and evolve their penetration testing strategies accordingly.
Understanding how an attacker could move through these environments and what that means in terms of business risk is becoming increasingly important, particularly when it comes to operating technology.
Operating Technology: The Convergence of IT and Physical Systems
As organizations modernize industrial environments, many are introducing connectivity without fully understanding the resulting security implications or exposure.
OT environments monitor and control physical processes across industries such as manufacturing, energy, transportation, and utilities.
Common Security Risks
Examples of OT Components
Programmable Logic Controllers (PLCs)
- Industrial Control Systems (ICS)
- Supervisory Control Systems (SCADA)
- Building Management Systems
- Industrial sensors and connected devices
Historically, these systems operated in isolated environments with limited connectivity to corporate networks. However, modernization initiatives have increasingly connected OT environments to enterprise IT systems.
Drivers of IT/OT Convergence
- Remote monitoring and maintenance
- Centralized operational analytics
- Cloud-based management tools
- Vendor support access
While these changes improve visibility and efficiency, they also introduce new pathways between IT and operational environments.
Unique OT Security Challenges
- Legacy hardware with long lifecycles
- Unsupported operating systems
- Proprietary industrial protocols
- Limited patching capabilities
In addition, cyber incidents in OT environments may have physical consequences, including:
- Operational disruption
- Equipment damage
- Safety risks to personnel and infrastructure
These factors make OT environments fundamentally different from traditional IT systems and require specialized approaches to security testing.
Penetration Testing Methodologies
As organizations rapidly deploy capabilities, many are doing so without fully understanding how these systems can be manipulated or abused.
Testing systems requires specialized techniques designed to evaluate how models behave under adversarial conditions. Unlike traditional application testing, these assessments focus on model behavior, system interactions, and how outputs can be influenced by malicious inputs.
OT Penetration Testing Approaches
Security testing within operational environments must be carefully designed to avoid disrupting critical processes. OT penetration testing typically includes:
Architecture Review
Evaluates how OT systems connect to corporate IT networks and external environments.
Network Segmentation Testing
Determines whether segmentation controls effectively isolate industrial systems.
Industrial Protocol Analysis
Examines specialized communication protocols used within OT environments.
Device Security Assessment
Evaluates controllers, sensors, and connected devices for vulnerabilities.
Controlled Exploitation Techniques
Employs safe testing methods designed to prevent operational disruption.
The overall objective is to identify vulnerabilities and potential attack paths while maintaining operational continuity.
In Summary
The enterprise attack surface is evolving rapidly as organizations adopt new technologies to drive innovation and operational efficiency. New OT environments and the growing need to evaluate detection and response capabilities are reshaping how security risk is understood and managed.
Traditional penetration testing approaches were not designed to address how these environments behave today. But organizations that evolve their testing strategies are gaining clearer visibility into how attacks originate, how they progress across systems, and where controls are most likely to fail.
More importantly, they gain insight into how those weaknesses could impact business operations and where to take critical action before they’re exploited.
How S3 Security Can Help
As organizations grow more complex and interconnected, many find traditional point‑in‑time penetration testing no longer tells the full story, and they need a partner who will not only analyze how their environment performs under real-world conditions, but helps them prioritize where to focus next.
S3 Security works alongside your teams to evaluate risk across modern environments and provide clear, practical guidance on how to strengthen detection, response, and overall resilience. Our approach is designed to simulate real attacker behavior and uncover the attack paths that matter most. Every engagement is led by senior-level testers with deep, real-world experience. There are no junior resources and no unnecessary complexity.
Perhaps most importantly, we focus on helping your team understand not just where vulnerabilities exist, but how attackers move through your environment, how risks connect across systems, and which actions will have the greatest impact in reducing exposure.
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