EDR (Endpoint Detection and Response)

Short Definition

EDR is a security tool that monitors endpoints (laptops, servers, cloud workloads) for threats, anomalies, and malicious behavior, enabling real-time detection and automated or manual response actions.

Deep Technical Explanation

Endpoints are common entry points for attackers. EDR provides deep visibility into what is happening on each device. It detects malicious behaviors such as:

ransomware activity
privilege escalation attempts
suspicious processes
persistence mechanisms
abnormal file access
unusual command line activity

An EDR agent continuously collects telemetry from the endpoint, analyzes behavior, and sends alerts to the SOC whenever suspicious activity is detected. Unlike traditional antivirus software, which relies mainly on known signatures, EDR focuses on behavioral detection, anomaly analysis, and real-time visibility into how processes and users behave on the device.

EDR platforms also support:

Real-time isolation
Disconnecting an endpoint from the network during an active attack to stop lateral movement and contain damage.

Process killing
Terminating malicious or suspicious processes before they escalate into full compromise.

File quarantine
Blocking or isolating harmful files to prevent malware from spreading across the environment.

Forensic data collection
Capturing artifacts such as process trees, command histories, memory data, and file changes to support deep investigation and root cause analysis.

EDR is a critical component of SOC as a Service because it provides precise visibility into endpoint activity and detects attacks that bypass perimeter defenses, exploit user behavior, or use advanced techniques like fileless malware.