CASE STUDY

Full-Scope Red Team Assessment for a Multi-Site Healthcare Provider

Conducted an adversarial red team engagement across 12 hospital sites, uncovering critical vulnerabilities in medical device networks and patient data access controls.

THE BRIEF

A Healthcare Provider Needed Adversarial Validation

A multi-site healthcare provider with 12 hospital sites needed a realistic, full-scope red team engagement to test their defences against a determined attacker targeting patient data and critical medical infrastructure.

No prior red team testing had been conducted across the estate
Medical device networks were suspected to be isolated but never validated
Patient data access controls were policy-defined but not technically enforced
Staff phishing resilience was unknown across all 12 sites

Our mandate was to simulate a sophisticated, persistent threat actor and provide a prioritised roadmap to close every gap uncovered.

Services Used:

Red Team AssessmentSocial EngineeringMedical Device Security

TESTIMONIAL

“The red team engagement opened our eyes to vulnerabilities we never knew existed. Encyphers operated with complete professionalism, delivered devastating findings, and then worked alongside us to fix every single one. An exceptional team.”

Dr. James Harlow

Head of Information Security, Healthcare Trust

THE CHALLENGE

The Gaps They Faced

Despite having documented security policies, the technical reality across 12 sites was very different:

Medical device VLANs had undocumented cross-segment connectivity
Domain admin credentials were recoverable via Kerberoasting attacks
Physical access controls at two sites were bypassed in under 10 minutes
Staff at 34% of sites clicked on simulated phishing emails

The challenge was the sheer scale and complexity of the estate, with legacy systems, third-party suppliers, and 12 geographically distributed sites.

THE SOLUTION

What We Delivered

We conducted a phased, full-scope red team engagement covering all attack vectors:

Performed OSINT reconnaissance and targeted phishing across all 12 sites
Achieved initial access and lateral movement to a domain admin position within 48 hours
Documented and demonstrated access to patient data systems with minimal detection
Delivered a prioritised remediation report with technical proof-of-concept for every finding

Every finding was accompanied by a clear, costed remediation recommendation enabling the trust to act immediately.

24 Critical Findings Resolved

All critical and high-severity vulnerabilities identified during the engagement were fully remediated within 45 days.

Medical Device Networks Isolated

Proper VLAN segmentation was implemented across all 12 sites, eliminating cross-network device access.

Phishing Resilience Improved by 68%

Targeted staff awareness training drove phishing click rates from 34% down to 11% within three months.

Physical Security Hardened

Access control weaknesses at all affected sites were remediated and re-tested within 30 days.

Credential Hygiene Enforced

Service account privilege was reduced and Kerberoasting attack vectors were eliminated across the domain.

Detection Capability Improved

New SIEM detection rules based on red team TTPs reduced attacker dwell time from days to under 4 hours.

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“Encyphers delivered a complete digital transformation for our retail business, combining AI-powered systems, cloud infrastructure, and ecommerce solutions into one fully scalable and high-performance ecosystem. Their strategic approach significantly improved efficiency, customer experience, and overall business growth.”

Yuki KashiwagiVP of Technology, Retail Enterprise

Tell Us About Your Project

Share your requirements or challenges, and our team will design a tailored solution aligned with your business goals.

Have questions or are ready to build AI-powered web, ecommerce, or digital solutions? Encyphers helps startups & enterprises create scalable digital products. We respond within 24 hours.

Emailhello@encyphers.com

Call us+1 718 312 8022

Connect quickly with:

Yuki KashiwagiVP of Technology, Retail Enterprise