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ISC2 Systems Security Certified Practitioner (SSCP) Practice Question

Your team operates a fleet of Amazon EC2 instances in an Auto Scaling group behind an Application Load Balancer. CloudWatch alarms suddenly show a surge in outbound SMTP traffic from one instance, and GuardDuty flags the same instance for possible mass-mailing worm activity. To contain the threat while keeping the application available, which action should you take first?

  • Deregister the suspicious instance from the load balancer target group and apply a restrictive security group that blocks all outbound connections.

  • Enable Amazon GuardDuty across the account to gather additional threat intelligence before taking further action.

  • Use AWS Systems Manager Patch Manager to immediately push the latest operating-system patches to every instance in the Auto Scaling group.

  • Terminate the entire Auto Scaling group and redeploy the application from a clean, patched Amazon Machine Image (AMI).

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