Evaluating EDR Clients: A Deep Dive into the EDR Telemetry Project

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Endpoint Detection and Response (EDR) solutions are critical for enterprise cybersecurity. The EDR Telemetry Project (https://lnkd.in/gFXKUndy) provides a comprehensive evaluation of EDR solutions, focusing on their telemetry capabilities to help organizations make informed security decisions. Maintained by Kostas T., this project currently covers Windows and Linux EDR clients, with macOS support coming soon.

Key EDR Vendors Evaluated

The project scores the following EDR solutions:

  • CrowdStrike
  • SentinelOne
  • Microsoft Defender
  • Uptycs
  • HarfangLab
  • Trellix
  • Elastic
  • Cortex XDR
  • ESET Inspect
  • Trend Micro
  • LimaCharlie
  • Qualys
  • Cylance Inc. (now part of Artic Wolf)
  • Cybereason
  • Symantec
  • Fortinet FortiEDR
  • Sysmon
  • Carbon Black
  • WatchGuard Technologies
  • OpenEDR

Scores: https://lnkd.in/ghgHZ_MD
GitHub Repo: https://lnkd.in/gbPM4yws

You Should Know: Testing EDR Solutions in Linux & Windows

1. Checking EDR Logs in Linux

Most EDR solutions log events in `/var/log/` or /opt/<edr_vendor>/logs/. Use:

sudo tail -f /var/log/syslog | grep "EDR_Alert" 
journalctl -u edr-agent --no-pager -n 50

2. Simulating Malicious Activity (Testing EDR Detection)

Use Atomic Red Team to test EDR detection:

git clone https://github.com/redcanaryco/atomic-red-team 
cd atomic-red-team 
./atomic-test-runner --technique T1059.003

3. Windows EDR Log Analysis with PowerShell

Check Defender logs:

Get-WinEvent -LogName "Microsoft-Windows-Windows Defender/Operational" -MaxEvents 20

4. Disabling Sysmon for Testing (Temporarily)

Stop-Service Sysmon 
 Re-enable after testing 
Start-Service Sysmon

5. Testing EDR API Access (Linux)

curl -X GET --header "Authorization: Bearer API_KEY" https://edr-api.example.com/alerts

What Undercode Say

EDR solutions are only as strong as their telemetry. The EDR Telemetry Project highlights lesser-known vendors like Uptycs, HarfangLab, and LimaCharlie, which deserve attention. Enterprises must:
– Regularly test EDR detection capabilities.
– Compare telemetry depth across vendors.
– Monitor Linux and Windows logs for anomalies.

For blue teams, integrating Sysmon with EDR enhances visibility. For red teams, bypassing EDR requires deep understanding of telemetry sources.

Expected Output:

A well-evaluated EDR deployment should:

  • Log process creation, network connections, and file modifications.
  • Provide real-time API access for SIEM integration.
  • Detect living-off-the-land binaries (e.g., `certutil.exe` abuse).

Stay updated with the EDR Telemetry Project for evolving insights.

References:

Reported By: Mthomasson Evaluating – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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