What Is EDR? Endpoint Detection and Response Explained for Business

# What Is EDR? Endpoint Detection and Response Explained for Business

Traditional antivirus is no longer enough to protect your business. Modern threats — ransomware, fileless malware, supply chain attacks, and credential theft — routinely bypass signature-based antivirus. Endpoint Detection and Response (EDR) is the next generation of endpoint security designed to detect, investigate, and respond to advanced threats in real time.

## What EDR Does

EDR continuously monitors every endpoint (laptop, desktop, server) for suspicious behavior — not just known malware signatures. When it detects something anomalous, it can:

• **Alert** security teams with detailed forensic data
• **Isolate** the endpoint from the network to prevent lateral movement
• **Kill** malicious processes automatically
• **Roll back** changes made by ransomware (on some platforms)
• **Record** a complete timeline of endpoint activity for investigation

## EDR vs Traditional Antivirus

| Capability | Traditional AV | EDR | |-----------|---------------|-----| | Known malware detection | ✓ Signature matching | ✓ Plus behavioral analysis | | Unknown/zero-day threats | ✗ Limited | ✓ Behavioral + AI detection | | Fileless malware | ✗ Cannot detect | ✓ Monitors process behavior | | Ransomware rollback | ✗ No | ✓ Some platforms (SentinelOne, etc.) | | Forensic investigation | ✗ Basic logs | ✓ Full endpoint timeline | | Network isolation | ✗ No | ✓ One-click quarantine | | Managed response (MDR) | ✗ Rarely | ✓ 24/7 SOC monitoring available |

## Key EDR Capabilities

### Behavioral Detection

EDR watches what programs DO, not just what they ARE. A legitimate-looking executable that starts encrypting files, accessing credential stores, or establishing command-and-control connections triggers alerts based on behavior patterns.

### Threat Hunting

EDR platforms allow proactive threat hunting — searching across all endpoints for indicators of compromise (IOCs) like specific file hashes, registry modifications, or network connections to known-bad destinations.

### Automated Response

When a threat is confirmed, EDR can automatically: 1. Kill the malicious process 2. Quarantine the affected files 3. Isolate the endpoint from the network 4. Notify the security team with full context

### Forensic Timeline

Every endpoint event is recorded: process creation, file modifications, network connections, registry changes, user logins. When a security incident occurs, investigators have a complete timeline rather than scattered log fragments.

## Do You Need EDR?

## EDR Deployment Considerations

• **Cloud-managed** — All major EDR platforms are cloud-managed. No on-premises server required
• **Agent-based** — A lightweight agent installs on each endpoint (Windows, macOS, Linux)
• **Performance impact** — Modern EDR agents use 1-3% CPU on average. Significantly lighter than legacy AV
• **Integration** — EDR should integrate with your SIEM, email security, and identity platform

## Leading EDR Platforms for Business

• **SentinelOne** — AI-powered, strong ransomware rollback
• **CrowdStrike Falcon** — Cloud-native, excellent threat intelligence
• **Microsoft Defender for Endpoint** — Integrates with M365, good for Microsoft-heavy environments
• **Sophos Intercept X** — Strong small business offering with MDR option

## The MDR Layer

Most small and mid-size businesses do not have a Security Operations Center (SOC) to monitor EDR alerts 24/7. Managed Detection and Response (MDR) adds a human layer — a team of analysts who monitor your EDR alerts, investigate threats, and take action on your behalf. Summit DNC provides managed endpoint security with 24/7 monitoring for businesses across Southern California.