Amazon GuardDuty

Amazon GuardDuty is a fully managed threat detection service. GuardDuty uses both known and unknown threat detection systems to protect one or more AWS accounts from malicious or unauthorized activity. GuardDuty examines your CloudTrail, VPC Flow Logs, and DNS Query logs for threats identified by AWS and trusted partners and produces detailed, actionable findings.  

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AWS Lambda

AWS Lambda is the cornerstone of the AWS serverless framework and provides a fully managed, zero-admin, auto-scaling, pay-per-use, code execution environment. There is no cost when AWS Lambda functions are not running. Code for AWS Lambda functions can be written in one of several popular languages, including Javascript (node.js), Java, Python, and C#. Execution of AWS Lambda functions can be triggered programatically, or may triggered automatically by events from other AWS services, such as SNS, S3, or Kinesis.AWS Lambda Notes

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