Physical penetration testing: overcoming the false sense of security
When businesses bring in new physical and technical security measures, they are often sold on their most cutting-edge features: how they strengthen protection against an identified threat, how they integrate with smartphones and remote worker devices, or how they can be monitored and managed from anywhere.
What's harder to guarantee, however, is how effective these security measures will be if a break-in occurs. Too often, businesses are left to find this out the hard way, discovering only after a breach that their measures never supported a truly resilient security strategy.
One of the best ways to overcome this is through simulated, real-world testing. Employed by specialist security consultancies and intelligence providers, trained professionals can carry out penetration tests to identify the weak spots in a business's physical security strategy – verifying whether the staff, technology and procedures in place are truly ready to withstand a real-world attack. Their insights enable clients to assess security holistically, ensuring every layer works together under one resilient strategy.
It is vital to ensure that any such tests are conducted on the basis that there is no pass or fail, rather they are designed to test security and learn from the results. This helps strengthen and enhance security by testing it before a threat actor does. The intention should never be to use this form of testing for punitive measures as it can significantly damage trust within an organisation, as well as restrict the speed at which remedial actions can be adopted.
What the tools don’t tell you
Physical and electronic security measures form part of the strategy. Organisations often rely on a range of electronic and physical security measures, including alarm systems, physical locks, access control systems, contact sensors or passive infrared sensors, a zonal alarm system, and CCTV cameras. Without assessing how well these measures have been implemented, question marks often loom over their effectiveness. Can this lock be picked? Can that sensor be bypassed? Can the alarm system be disabled remotely, or onsite?
Advanced intruders can even target seemingly innocent devices for this type of breach, taking advantage of sites which may use the same network for their security systems as Internet of Things devices. Printers or vending machines that automatically reorder stock, for example, may sit on the same IT infrastructure as critical systems like access control and CCTV. Having one weak point within the network can compromise everything, giving an intruder access to the entire security system.
Businesses are therefore left with a difficult reality to contend with. They can install the latest high-tech tools but remain unaware of where their weak points lie, or how to resolve them. Furthermore, the vulnerability often sits with the person behind the systems, and not necessarily the systems themselves. This is why tests don’t just look at the security measures in place, but also the people interacting with them. Intruders do not need to bypass a lock if a member of staff is willing to politely hold the door open for them. A good security culture is vital to ensuring that security measures work as intended.
Address the gaps with penetration testing
This is why ongoing physical penetration testing must become part of any organisation's security strategy. Here, skilled professionals ethically attempt to gain ‘unauthorised’ access to a site using subterfuge, social engineering and non-damaging bypass methods – identifying physical and procedural vulnerabilities in the process. Most businesses recognise the value of cyber penetration testing but neglect physical penetration testing. Security convergence tells us that we need to think about the risks as a whole. A great firewall is of no use if a threat actor walks straight into your server room.
It is vital that physical penetration tests also follow a structured process to provide assurance to clients and collect the most pertinent data. After conducting pre-hostile reconnaissance and gathering open-source intelligence, the ‘operative’ follows a detailed exploitation plan. This includes:
- Employing tactics including social engineering, disguises and exploiting weaknesses in physical security systems
- Testing access controls, surveillance systems and security personnel responses
- Targeting any specific points or vulnerabilities identified by the client. For example, an informal route to a smoking area that may bypass the standard access control route
Following a test, the professional evaluates any relevant policies, procedures, and response plans. They share a detailed report, including the results of intelligence gathering and reconnaissance, the exploitation plan carried out, and a detailed chronological summary of key events.
Building a resilient, holistic security strategy
While a single test can offer a thorough, real-world assessment of a site's security resilience, it is only ever a snapshot. Threats are constantly evolving, so testing should never be treated as a one-off exercise; it should instead form part of an ongoing strategy to gain resilience over time.
Test results can also help shape priorities for other simulated activities, such as tabletop exercises. Here, security consultancies develop realistic hypothetical scenarios to evaluate staff preparedness and response capabilities. They help officers think logically through their reactions in a safe environment, so they're able to act decisively when it matters most.
These methods provide an important reminder of the complex interplay between technology, people and processes behind any solid security strategy. Physical penetration testing identifies where overreliance on physical security and modern access tools can fall short, highlights where staff may need further training, and where processes or technology require closer governance and auditing.
At a time when a single compromised device can threaten an entire security network, this holistic approach becomes even more essential. Leaving human factors to chance offers no safety net for the increasingly likely event of a remote breach. True resilience, therefore, stems only from continuous assessment, training and adaptation.
About Neil Shanks
Neil Shanks is the Director of Corps Intel, where he leads a team of consultants and analysts delivering enterprise-level resilience strategies for clients across the UK. Having worked in a range of high-security environments and with an MSc in Security Management, Neil is an expert in risk mitigation and designing security solutions. He specialises in regulation and security risk management, which enables him to work with Corps’ customers to design and develop security strategy whilst optimising operational performance in line with sector-specific regulations. He is also a Chartered Security Professional (CSyP).