ENDPOINT DETECTION AND RESPONSE (EDR)

Endpoint Detection and Response (EDR) is a cybersecurity solution focused on the detection, investigation, and response to advanced threats targeting endpoint devices, such as computers, laptops, and servers.

EDR is comparable to a CCTV system with a digital detective working 24/7 to continuously monitor and analyze all activities on the device, particularly focusing on threats that manage to bypass the first line of defense (such as Antivirus or EPP).

How EDR Works

EDR does not focus on Prevention like Antivirus, but primarily on Hunting and Response. It operates through four main stages:

Continuous Monitoring

    •    EDR installs an Agent (small software) on each endpoint device.
    •    The Agent records and collects detailed, real-time activity data occurring on the machine (e.g., file creation, Registry changes, network connections, process execution). This data is known as Telemetry Data.

Detection & Analysis

    •    The collected data is sent to a Central Analysis Hub (often Cloud-based).
    •    The system uses Machine Learning and Behavioral Analysis to look for Anomalies or Indicators of Attack (IOA) that suggest an unknown threat (Unknown Threats), such as Ransomware attempting to rapidly encrypt files.

Automated Response

    •    Upon threat detection, EDR can automatically take immediate action to Containment the damage before the threat can spread.
    •    Common responses include Isolating the Endpoint from the network or Terminating the malicious Process.
Investigation & Forensics (การสืบสวนเชิงลึกและการแก้ไข):
    •    EDR allows security teams to quickly perform Root Cause Analysis of an attack by reviewing the complete timeline of events (acting like a DVR - Digital Video Recorder).
    •    It enables Threat Hunting (proactive threat seeking) by searching for suspicious activity in stored historical data to uncover dormant or previously undetected hackers.

Why EDR is Important

EDR has become a critical technology for modern organizations due to:

    •    Increased Threat Sophistication: EDR can detect advanced attacks that evade traditional detection methods (e.g., Fileless Malware, Living off the Land).
    •    Visibility into Blind Spots: EDR provides complete Visibility into activities within the device, which conventional Antivirus systems cannot achieve.
    •    Reduced Response Time (MTTR): It drastically reduces the time required to detect a threat and respond to an incident, minimizing the impact on business operations.