EDR Deployment - Moving Beyond Traditional Antivirus

We deployed endpoint detection and response (EDR) across all endpoints last month. Traditional antivirus is no longer sufficient for modern threats. Here's why we made the switch.

Why EDR

Traditional antivirus relies on signature matching - it knows what known malware looks like and blocks it. Problem: new malware appears constantly, and attackers use techniques that don't look like traditional malware. EDR watches behavior, not just signatures.

What EDR Does

EDR agents monitor endpoint activity: process execution, file changes, network connections, registry modifications. When something suspicious happens - even if it's not known malware - EDR detects and alerts. Some can automatically contain threats.

The Selection

We evaluated CrowdStrike, SentinelOne, and Microsoft Defender for Endpoint. Chose Defender for Endpoint based on Microsoft licensing we already had (E5 security) and integration with our Microsoft-heavy environment. Performance has been solid.

Deployment Lessons

Deployed in phases: IT first, then office, then warehouse, then servers. Discovered several legitimate applications that looked suspicious to EDR - had to create exclusions. Also found two machines with unauthorized software that traditional AV had missed.

Ongoing Operations

EDR requires attention. Alerts need review. False positives need tuning. We spend about 30 minutes daily reviewing the dashboard. More work than "install and forget" AV, but much better protection.