Adversarial testing of your external perimeter, internal network and Active Directory — from an internet-facing foothold to full domain compromise. NCSC CHECK-certified testers, on-site or remote.
Book a scoping call See the methodologyOne unpatched VPN appliance, one misconfigured firewall rule, one over-privileged service account — and an outsider walks the same path your employees do. Infrastructure flaws chain: a foothold becomes lateral movement, and lateral movement becomes the domain.
VPNs, firewalls and remote-access gateways are internet-facing by design and exploitable by default. Attackers reach them first — and patch cycles rarely keep pace with disclosed CVEs.
Where segmentation is weak, one compromised workstation exposes file shares, databases and management interfaces. Lateral movement needs no exploit — just trust that was never questioned.
Decades of privilege accumulation — Kerberoastable accounts, delegation misconfigurations, legacy trusts — mean one cracked credential often leads straight to domain admin.
Most intrusions don't need a zero-day — they need an exposed edge device, a weak credential and a network that trusts too easily.
Of breaches involve credentials stolen or brute-forced from internet-facing systems, rather than novel exploits.
Source: Verizon DBIR (2024)Days or less is the median time for an attacker to move from initial access to lateral movement across the network.
Source: Mandiant M-TrendsEdge devices and VPNs ranked the most exploited initial access vector — ahead of phishing — in recent incident data.
Source: NCSC & CISA joint advisoriesHigher cost of a breach when attackers dwell undetected for over 200 days — the norm when internal networks go untested.
Source: IBM Cost of a Data BreachFigures reflect published industry research at time of writing; sources cited per card. We're happy to walk through the underlying studies on a scoping call.
Infrastructure penetration testing is a controlled security assessment in which qualified testers simulate real-world attacks against external networks, internal infrastructure and Active Directory to identify exploitable weaknesses before attackers can use them.
Tests your environment from the perspective of a real attacker rather than simply listing known vulnerabilities.
Proves which weaknesses can actually be exploited and how they can be chained into deeper compromise.
Follows realistic routes from perimeter footholds through lateral movement and privilege escalation to critical systems.
Produces evidence and practical guidance your infrastructure and security teams can use to close verified attack paths.
Infrastructure penetration testing puts a certified human attacker at your network — probing the external perimeter for a foothold, then pivoting through the internal estate the way a real intruder would: exploiting edge devices, harvesting credentials, abusing trust relationships and chaining misconfigurations into the outcome that matters — domain compromise.
Our CHECK-certified testers work both directions. Externally, we attack what the internet can see: VPN gateways, firewalls, mail servers, remote access. Internally, we assume breach and go hunting: segmentation testing, privilege escalation, Active Directory attack paths, and the flat-network trust that turns one host into the whole estate.
The result is a report written for decisions: every finding with an attack path, business impact, severity you can defend, and remediation your engineers can implement.
As a UK provider working under the NCSC CHECK scheme, our testing is recognised across UK government, financial services and regulated industries — and maps directly to Cyber Essentials Plus, ISO 27001, UK GDPR, DORA and NIS2 obligations.
A scanner lists CVEs. A penetration tester chains them — proving how an unpatched edge device, a reused password and an over-privileged account combine into domain admin.
We test the full kill chain — perimeter foothold, lateral movement, privilege escalation — not isolated hosts scored out of context.
Kerberoasting, delegation abuse, ACL misconfigurations and trust exploitation — mapped against your real domain, with paths ranked by business impact.
NCSC CHECK-certified professionals attack your network by hand — with the judgment to chain findings a scanner scores as noise.
Internal engagements start from a compromised endpoint — because attackers don't stop at your front door, and neither should testing.
Every finding ships with the attack path, the root cause and the concrete fix — hardening guidance your team can apply without a call.
Fixes often shift the attack path rather than closing it. We re-verify every remediation against the original chain at no extra cost.
Every engagement follows the same business-first process — scoped precisely to the systems that matter to your P&L.
Prompt injection, model abuse, RAG data leakage and agent tool misuse — tested before your AI goes live.
ApplicationsAuthentication flows, business logic and the full OWASP Top 10 — attacked the way a real adversary would.
ApplicationsREST and GraphQL endpoints, token handling, and authorisation gaps exposed through the interfaces your partners rely on.
NetworksExternal perimeters, internal networks and Active Directory — from internet-facing foothold to domain compromise.
ApplicationsiOS and Android apps dissected for insecure storage, weak transport and tampering risks on real devices.
NetworksCorporate Wi-Fi, rogue access points and WPA2/WPA3 weaknesses — tested on-site, at your offices.
Six phases, from scoping through to ongoing assurance. Every phase is documented, every finding is actionable.
We inventory your external estate, network ranges and Active Directory environment, agree test windows, credentials and rules of engagement — so testing never collides with production operations.
Manual adversarial testing across the full infrastructure kill chain: perimeter exploitation, credential attacks, lateral movement, segmentation testing and Active Directory attack paths — chained into real routes to domain compromise.
Every finding written as an attack path — the foothold, the privilege reached, the business consequence — with reproduction steps, evidence, MITRE ATT&CK mapping and a fix your engineers can act on. Reports land within 5 working days.
We stay with your engineers — by call or on-site — reviewing patches, advising on segmentation and privilege architecture, and confirming each fix closes the path rather than rerouting it.
We replay the full attack paths, not just the individual findings — because a patched gateway is worthless if the same chain survives through a sibling route.
Networks change weekly. We re-test on your change cadence — every quarter or release cycle — so new firewalls, subnets and domain changes arrive tested, not untested.
Fixed-fee, CHECK-certified, scoped around your real attack surface. One call is enough to size it.
Book a scoping call