Why it exists
Prevention eventually fails. EDR provides the visibility needed to notice an attack in progress and stop it.
How it works
- 1An agent records process, file, and network activity
- 2Detection logic flags suspicious behavior
- 3Analysts investigate a timeline
- 4Responders isolate devices or remediate
Real-world example
EDR flags an office app spawning PowerShell that downloads a file. An analyst isolates the laptop from the network while investigating.
Common misconceptions
- “EDR works on its own.” Someone has to review and act on alerts — your team or a managed service.
Benefits
- Visibility for investigations
- Containment actions
Limitations
- Needs skilled people or MDR
- Alert volume can be high
How it differs from related technologies
Antivirus focuses on blocking; EDR adds detection and investigation. XDR correlates across more data sources. MDR is a service that runs it for you.
Questions a buyer should ask
- Who responds to alerts after hours?
- Can you show a real investigation timeline?
Learning path
beginner
- • Learn AV vs. EDR vs. XDR vs. MDR
intermediate
- • Read How to Evaluate Endpoint Security
advanced
- • Define response playbooks and SLAs