What is EDR?
Endpoint Detection and Response (EDR) is a security technology that continuously monitors endpoint activity, recording process execution, file system changes, registry modifications, and network connections for threat detection, investigation, and response.
Definition
- EDR
- Endpoint Detection and Response (EDR) is a security technology that continuously monitors endpoint activity, recording process execution, file system changes, registry modifications, and network connections for threat detection, investigation, and response.
How EDR Works
EDR agents run on every protected endpoint and stream behavioral telemetry to a cloud or on-premises backend. Unlike traditional antivirus that scans for known file signatures, EDR records the full context of what processes do: files created, registry keys modified, network connections established, and child processes spawned. This behavioral record enables retrospective investigation. You can replay exactly what happened on an endpoint during an incident, even if the malware has been deleted.
Detection relies on a combination of signature matching, behavioral indicators, and ML models trained on endpoint telemetry. Response capabilities include process kill, file quarantine, network isolation, and live response shells for hands-on forensic investigation. Leading platforms include CrowdStrike Falcon, SentinelOne, Microsoft Defender for Endpoint, and Carbon Black.
EDR is the foundation of endpoint security in mature SOC environments. Most XDR platforms are built by extending an EDR agent to consume additional data sources.
EDR in SOC Operations
SOC analysts rely on EDR telemetry as ground truth for endpoint investigations. When a SIEM fires an alert about a suspicious PowerShell command, you open the EDR console to review the full process execution chain, identify the parent process, check for injected code, and determine the blast radius. EDR's isolation capability is a critical containment action during active incidents. You can quarantine a compromised host without physically touching it.
Practice EDR in a Real SOC
SOCSimulator provides hands-on training with realistic SIEM, XDR, and Firewall interfaces. Build real analyst skills investigating edr scenarios with zero consequences — free forever.
Related Terms
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