Amazon GuardDuty
Amazon Guard Duty User Guide

Logging Amazon GuardDuty API Calls with AWS CloudTrail

Amazon GuardDuty is integrated with AWS CloudTrail, a service that provides a record of actions taken by a user, role, or an AWS service in GuardDuty. CloudTrail captures API calls for GuardDuty as events, including calls from the GuardDuty console and from code calls to the GuardDuty APIs. If you create a trail, you can enable continuous delivery of CloudTrail events to an Amazon S3 bucket, including events for GuardDuty. If you don't configure a trail, you can still view the most recent events in the CloudTrail console in Event history. Using the information collected by CloudTrail, you can determine the request that was made to GuardDuty, the IP address the request was made from, who made the request, when it was made, and more.

To learn more about CloudTrail, including how to configure and enable it, see the AWS CloudTrail User Guide.

GuardDuty Information in CloudTrail

CloudTrail is enabled on your AWS account when you create the account. When supported event activity occurs in GuardDuty, that activity is recorded in a CloudTrail event along with other AWS service events in Event history. You can view, search, and download recent events in your AWS account. For more information, see Viewing Events with CloudTrail Event History.

For an ongoing record of events in your AWS account, including events for GuardDuty, create a trail. A trail enables CloudTrail to deliver log files to an Amazon S3 bucket. By default, when you create a trail in the console, the trail applies to all regions. The trail logs events from all regions in the AWS partition and delivers the log files to the Amazon S3 bucket that you specify. Additionally, you can configure other AWS services to further analyze and act upon the event data collected in CloudTrail logs. For more information, see:

All GuardDuty actions are logged by CloudTrail and are documented in the Amazon GuardDuty API Reference.

Every event or log entry contains information about who generated the request. The identity information helps you determine the following:

  • Whether the request was made with root or IAM user credentials

  • Whether the request was made with temporary security credentials for a role or federated user

  • Whether the request was made by another AWS service

For more information, see the CloudTrail userIdentity Element.

Example: GuardDuty Log File Entries

A trail is a configuration that enables delivery of events as log files to an Amazon S3 bucket that you specify. CloudTrail log files contain one or more log entries. An event represents a single request from any source and includes information about the requested action, the date and time of the action, request parameters, and so on. CloudTrail log files aren't an ordered stack trace of the public API calls, so they don't appear in any specific order.

The following example shows a CloudTrail log entry that demonstrates the CreateIPThreatIntelSet action.

{ "eventVersion": "1.05", "userIdentity": { "type": "AssumedRole", "principalId": "AIDACKCEVSQ6C2EXAMPLE", "arn": "arn:aws:iam::444455556666:user/Alice", "accountId": "444455556666", "accessKeyId": "AKIAI44QH8DHBEXAMPLE", "sessionContext": { "attributes": { "mfaAuthenticated": "false", "creationDate": "2018-06-14T22:54:20Z" }, "sessionIssuer": { "type": "Role", "principalId": "AIDACKCEVSQ6C2EXAMPLE", "arn": "arn:aws:iam::444455556666:user/Alice", "accountId": "444455556666", "userName": "Alice" } } }, "eventTime": "2018-06-14T22:57:56Z", "eventSource": "guardduty.amazonaws.com", "eventName": "CreateThreatIntelSet", "awsRegion": "us-west-2", "sourceIPAddress": "54.240.230.177", "userAgent": "console.amazonaws.com", "requestParameters": { "detectorId": "5ab04b1110c865eecf516eee2435ede7", "name": "Example", "format": "TXT", "activate": false, "location": "https://s3.amazonaws.com/bucket.name/file.txt" }, "responseElements": { "threatIntelSetId": "1ab200428351c99d859bf61992460d24" }, "requestID": "5f6bf981-7026-11e8-a9fc-5b37d2684c5c", "eventID": "81337b11-e5c8-4f91-b141-deb405625bc9", "readOnly": false, "eventType": "AwsApiCall", "recipientAccountId": "444455556666" }

From this event information, you can determine that the request was made to create a threat list Example in GuardDuty. You can also see that the request was made by an IAM user named Alice on June 14, 2018.