Which AWS service monitors for unexpected and potentially unauthorized activities?

Amazon GuardDuty is the service that monitors for unexpected and potentially unauthorized activities within an AWS environment. It is a continuous threat detection service that uses machine learning, anomaly detection, and integrated threat intelligence to identify and prioritize potential security threats.

GuardDuty analyzes various data sources, such as AWS CloudTrail event logs, VPC Flow Logs, and DNS logs, to detect unusual patterns that may indicate malicious activity or security vulnerabilities. For instance, it can identify unauthorized access attempts, abnormal API call behaviors, and instances that display signs of compromise.

The integration of threat intelligence allows GuardDuty to assess and respond to known malicious IP addresses and DNS requests, providing a comprehensive security monitoring solution. By using this service, organizations can gain real-time alerts for suspicious activities and take proactive measures to enhance their security posture, making it a critical tool for maintaining the integrity and security of AWS resources.

The other services mentioned have different primary functions. For example, Amazon Cognito primarily deals with user authentication and management processes, while Amazon Macie focuses on discovering and classifying sensitive data stored in AWS. AWS Key Management Service is centered around managing encryption keys for secure data access. Each of these services plays a distinct role in the AWS ecosystem, but it is Amazon GuardDuty that