Question

Difficulty: EasyEndpoint Detection and Response (EDR)

An enterprise Endpoint Detection and Response (EDR) system alerts a security analyst to an active malicious code injection on a user workstation. Sequence the standard EDR response steps from initial detection to host restoration.

  1. 1The EDR agent flags suspicious process behavior and triggers a high-severity incident alert.
  2. 2The security analyst initiates network isolation on the affected endpoint through the EDR console.
  3. 3The analyst terminates the malicious process tree and retrieves volatile memory telemetry for analysis.
  4. 4The endpoint is remediated, verified clean, and reconnected to the enterprise network.

Answer

The correct sequence starts with initial behavioral detection and alerting, followed by immediate endpoint network isolation, process termination and forensic telemetry collection, and concludes with host restoration.
The proper incident response workflow following an EDR alert begins with detection, moves immediately to containment (host network isolation), proceeds to eradication and evidence capture (terminating processes and dumping memory), and finishes with recovery (restoring endpoint network access).

Step-by-Step Solution

1
Identify initial threat detection
The EDR agent flags anomalous activity and alerts analysts.
Incident response workflows begin with detection and triage.
2
Contain the threat
Network isolation is applied to the workstation via EDR.
Immediate containment prevents lateral spread while maintaining management connectivity.
3
Eradicate and analyze
Malicious processes are killed and process/memory telemetry is gathered.
Stopping threat activity and capturing volatile evidence enables root cause analysis without losing host context.
4
Restore host operations
The endpoint is verified secure and un-isolated.
Host network access is restored only after containment, investigation, and cleanup are complete.

Key Concept

EDR Incident Containment and Response Sequence
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