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ISC2 Systems Security Certified Practitioner (SSCP) Practice Question

An information security team manages Windows Server 2019 instances in an Amazon EC2 Auto Scaling group that hosts an internal web application. Recently, incident responders observed repeated outbound command-and-control connections and malicious PowerShell commands executing only in memory; no suspicious binaries were found on disk. To most effectively detect and contain this fileless malware while minimizing ongoing operational effort, which action should the team take?

  • Use AWS Systems Manager Automation to run nightly full-disk signature-based antivirus scans on every instance.

  • Install a host-based endpoint detection and response (EDR) agent that applies behavior analytics and memory scanning to detect and quarantine suspicious processes.

  • Activate Amazon GuardDuty to alert on unusual VPC Flow Log and DNS activity and automatically isolate any flagged instance.

  • Enable deep packet inspection on the VPC network firewall and block all outbound traffic that is not destined for approved domains.

ISC2 Systems Security Certified Practitioner (SSCP)
Systems and Application Security
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