Our Approach

1. Realistic Threat Simulation
We begin by simulating realistic adversary behaviour using techniques derived from well-known frameworks such as MITRE ATT&CK. These simulations include:

  • Internal threat actor behaviour
  • Multi-stage killchains
  • Tactics such as lateral movement, credential abuse, and persistence

This provides a clear picture of what the EDR solution can detect—and where it fails.

2. Detection Gap Analysis
We analyse detection coverage by monitoring how the EDR and SOC respond to each phase of the simulated attacks. Particular attention is given to:

  • Missed detections
  • Incomplete alert context
  • Inability to correlate events across systems

These insights form the basis for identifying weaknesses in both the tool’s configuration and the organisation’s detection posture.

3. Collaborative Tuning and Rule Development
Once gaps are identified, we work closely with the client’s security team—and, where possible, with the EDR vendor—to develop custom detection rules and fine-tune existing ones. This may include:

  • Creating specific detection logic for client-relevant TTPs
  • Adjusting thresholds and alert logic
  • Refining telemetry collection and event logging

Our goal is to move from generic detection to precise, contextual alerting tailored to the client’s environment.

4. Integration and Validation
After implementing the improved detection logic, we re-run selected attack scenarios to validate the updates. This ensures the rules are:

  • Triggering accurately
  • Providing sufficient context
  • Integrated cleanly into SOC workflows and SIEM platforms

The validation process reinforces detection maturity and boosts confidence in the SOC’s ability to respond effectively.

Outcome: Improved SOC Resilience

This approach ensures that EDR tools and SOC processes are not just theoretically capable—but practically effective—against modern threats. The benefits include:

  • Higher detection coverage across the attack lifecycle
  • Reduced dwell time and faster response
  • Continuous improvement through detection engineering and threat-informed defence

Why It Matters

Security is not static. Threat actors constantly evolve, and EDR tools must be continuously validated and adapted to keep up. Tenendo’s EDR effectiveness evaluation helps organisations proactively identify gaps, strengthen detection rules, and improve overall SOC performance through a structured, collaborative, and threat-driven methodology.