EDR testing evaluates whether your endpoint detection and response platform actually catches the techniques advanced threat actors use. It goes beyond dashboard checks by running real attack chains and measuring what your EDR detects, what it misses, and how long alerts take to surface.

How is EDR testing different from penetration testing?

Penetration testing focuses on finding vulnerabilities in your systems. EDR testing focuses on evaluating your defensive tooling. The goal is not to break in, but to determine whether your EDR would catch someone who already has.

What evasion techniques does OFFCEPT test?

OFFCEPT tests process injection, living-off-the-land techniques, credential dumping, lateral movement, defense evasion, and exfiltration channels. Each category includes dozens of specific techniques mapped to MITRE ATT&CK.

What happens after an EDR test?

You receive a detailed detection gap analysis showing exactly which techniques slipped through. OFFCEPT then runs purple team sessions with your SOC to tune detection rules, close gaps, and verify improvements.

How often should we test our EDR?

At least annually, and ideally after any major EDR configuration change, rule update, or platform migration. Threat actor techniques evolve constantly. A detection rule set that worked six months ago may not catch current evasion methods.

OFFCEPT

Let's Talk

All Engagements

Real testing by experienced operators. Threat-informed scoping, actionable reporting, and verified remediation.

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What We Do

Penetration Testing

Manual testing that finds what scanners miss

Red Team Operations

Multi-week adversary simulations

CTEM

Continuous threat exposure management

Threat Intelligence

Data breach, dark web, and credential monitoring

EDR & XDR Testing

Endpoint detection gap analysis and evasion testing

Phishing & Social Engineering

Real campaigns, not generic templates

AI & LLM Security

Testing AI systems and LLM integrations

Zero-Day Research

Hunting undiscovered vulnerabilities

Reverse Engineering

Binary analysis, malware, and firmware

How We Work

From scoping to verified remediation in four phases. Every engagement follows the same structure, adapted to your threat landscape.

Full Breakdown

The Process

01 Scoping & Threat Model

Profile threat actors, map attack surface, define objectives

02 Testing & Exploitation

Manual testing, chained vulnerabilities, real attack paths

03 Reporting & Debrief

Proof, impact, remediation path, live walkthrough

04 Remediation & Validation

Re-test fixes, confirm they work, measurable improvement

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EDR & XDR Testing

Deploy an EDR and assume endpoints are covered. We test that assumption by running the same evasion techniques advanced threat actors use. If it misses something, we show you exactly what slipped through.

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Your EDR is only as good as what it catches.

Most organisations deploy an EDR, check the dashboard, and assume they are covered. We prove whether that is true by running the same techniques threat actors use and showing you exactly what slips through.

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We build custom payloads designed to bypass your EDR. Not generic malware samples from a library. Real evasion techniques adapted to your specific vendor and configuration. The same approach advanced threat actors use.

We walk through the MITRE ATT&CK matrix technique by technique and map exactly what your EDR catches and what it misses. You get a full visibility map showing blind spots your defenders don't know about.

Does your EDR actually block and quarantine, or does it just log and hope someone reads the alert? We test whether automated responses actually fire, whether they fire on the right things, and whether they can be bypassed.

We check whether your EDR is actually seeing everything on the endpoint. Process creation, network connections, file writes, registry changes. If the sensor has blind spots, the SOC has blind spots.

Your blue team works with our operators in real-time. We attack, they detect, we tune detection rules together. Every round closes more gaps and builds institutional knowledge in your SOC.

What We Test Against

Six categories. Real attack techniques.

Most Evaded

Process Injection

DLL injection, process hollowing, reflective loading. Testing whether your EDR catches code running inside legitimate processes.

Hardest to Detect

Living Off The Land

PowerShell, WMI, certutil, mshta. Using built-in Windows tools the same way threat actors do. No binaries dropped, nothing to scan.

High Impact

Credential Dumping

LSASS access, SAM extraction, Kerberos attacks. Does your EDR flag someone pulling all the passwords off a machine?

Critical Path

Lateral Movement

Pass-the-hash, PsExec, WMI remote execution, RDP hijacking. Testing whether EDR tracks movement between hosts.

Overlooked

Defense Evasion

Tamper protection bypass, EDR component disabling, log clearing. Testing whether the EDR can protect itself from someone who wants it gone.

Rising

Exfiltration Channels

DNS tunneling, HTTPS C2, encrypted beacons. If data is leaving your network through legitimate protocols, does your EDR notice?

200+

ATT&CK Techniques

Gap Map

Detection Coverage

Before & After

Measurable Improvement

Vendor Agnostic

Any EDR/XDR Stack

How It Works

From deployment to measurable improvement

Scope & Deploy

We review your EDR vendor, configuration, and detection rules. Then we deploy our test tooling on agreed endpoints, coordinated with your team to avoid operational disruption.

Execute Techniques

We run through ATT&CK techniques methodically. Process injection, credential dumping, lateral movement, defense evasion. Each technique is logged: triggered, missed, or partial.

Detection Report

Full breakdown of results: which techniques your EDR caught, which it missed, and which triggered inaccurate or noisy alerts. Mapped to the ATT&CK matrix with remediation guidance.

Tune & Validate

We work with your SOC to tune detection rules based on the gaps. Then we re-test to confirm the improvements actually work. Measurable before-and-after results.

Case Study

Manufacturing firm finds EDR missed 60% of lateral movement techniques

60% Detection Gaps Found200+ Techniques TestedManufacturing Sector

The EDR dashboard looked fine. Everything green. Then OFFCEPT showed us it was only catching 40% of lateral movement techniques. After purple team sessions and rule tuning, coverage went from 40% to over 90%.

Head of IT Security

Global Manufacturing Group

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Your EDR is not protecting what you think it is.

We run the same evasion techniques advanced threat actors use and show you exactly what your EDR misses. Detection gaps, response failures, and blind spots, mapped and measurable.

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