The resilience of our national infrastructure is the ultimate measure of security. For ISPs, energy providers, and utility firms, a breach isn't just a business loss, it is a threat to public safety.
Critical National Infrastructure (CNI) assets are prime targets for sophisticated threat actors, ranging from state-sponsored entities to organised sabotage groups. These environments require a unique security approach that accounts for the convergence of traditional IT, operational technology (OT), and sprawling, often unmanned, physical estates.
At Mongoose, we provide the specialist adversarial testing required to validate the resilience of these high-stakes environments. We bridge the gap between digital security and physical site integrity, delivering the objective evidence needed to protect the services the UK relies upon.
The CNI Threat Landscape
We understand the complex risk profile associated with critical utilities and communications:
Operational Continuity:
Identifying vulnerabilities that could lead to service blackouts, gas distribution failure, or large-scale ISP downtime.
Physical & Digital Convergence:
Probing the "Air-Gap" and identifying how a physical breach of a remote substation or exchange can facilitate a deep network compromise.
Supply Chain Fragility:
Auditing the third-party interactions and maintenance protocols that often serve as the weakest link in the security chain.
Regulatory Rigour:
Providing the independent verification required to meet the NIS Regulations and internal risk management protocols.
Our Specialist Services for CNI & Utilities
Advanced Physical Resilience Audits
Delivered by our in-house team of former UK Special Forces (Special Reconnaissance Regiment) personnel, we conduct the UK’s most realistic physical penetration tests. We don't just check fences; we perform covert reconnaissance and surreptitious entry simulations to test the resilience of remote sites, gas terminals, and telecommunications exchanges.
Digital Infrastructure & Network Pentesting
As a CREST-accredited firm, we perform rigorous testing of your external and internal network perimeters. Our goal is to identify the pathways an adversary would use to move laterally from non-critical systems into sensitive operational zones. We focus on the "Digital Pivot," demonstrating how a foothold in a corporate network can lead to a compromise of critical infrastructure.
Detection & "Soak Time" Analysis
During our engagements, we don't just aim for a breach; we measure your response. We perform "Detection Soaks" to evaluate how long our specialists can operate on-site or within your network before being identified by your security teams or automated monitoring systems.
Objective:
A UK-wide infrastructure provider required an audit of their regional distribution hubs to assess if a lack of on-site personnel could be exploited to gain network access.
The Operation:
Following a period of reconnaissance, our team identified that site access was managed via a legacy key-safe system used by multiple third-party contractors. By identifying a technical vulnerability in the key-safe’s mechanical bypass mechanism, our specialists were able to recover the entry code without leaving any visible signs of tampering. This allowed for unauthorised entry to the hub during a scheduled maintenance window.
Outcome:
Once inside, we demonstrated the ability to connect a network implant to a management port, bypassing external firewalls. We proved that an intruder could remain undetected for several days while mapping the internal network. Our findings led to a total overhaul of their physical access systems, replacing the legacy safes with a centralised, encrypted biometric access control system and hardening port-security across the entire estate.
How do you ensure safety during CNI testing?
Can you test remote or unmanned assets?
What standards do you follow for physical site testing?
Ready to see the gaps others are missing?
Don't wait for a real adversary to find the pathway. Contact our team today to discuss a tailored manual assessment for your organisation.
