Question

Difficulty: MediumEndpoint Detection and Response (EDR)

During an ongoing incident investigation, a security analyst suspects that a compromised workstation is executing fileless commands in memory and attempting to persist across reboots. Which of the following capabilities and telemetry sources provided by an Endpoint Detection and Response (EDR) solution should the analyst utilize to contain the threat and investigate the attack? (Select TWO)

  1. Initiating network isolation of the affected host while preserving agent-to-management console communicationAnswer
  2. Capturing real-time process execution lineage and parent-child relationship logsAnswer
  3. C
    Updating edge firewall stateless packet filtering rules to block internal host memory access calls
  4. D
    Relying strictly on scheduled static file signature updates to identify in-memory code injection

Answer

The correct response actions are isolating the affected host from the network while maintaining agent console connectivity, and collecting real-time process lineage telemetry to trace parent-child process execution.
Isolating the endpoint stops network-based propagation while maintaining EDR agent communication for analysis. Furthermore, process lineage logs provide behavioral visibility into parent-child process relationships, allowing analysts to detect fileless execution patterns.

Step-by-Step Solution

1
Identify the immediate containment capability required for an infected endpoint.
Network host isolation stops lateral network traffic while retaining remote management access for security staff.
Preventing lateral movement is critical during incident response without losing administrative control over the EDR agent.
2
Identify the telemetry source capable of diagnosing fileless memory execution.
Process lineage tracking captures the sequence of parent and child process creation.
Fileless scripts often run via legitimate binaries, requiring historical process trees to identify the root cause of execution.

Key Concept

Endpoint Detection and Response (EDR) Containment and Telemetry
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