AWS Kinesis Firehose stream destination modified

Classification:

attack

Tactic:

Technique:

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Goal

Detects when an AWS Kinesis Firehose Destination is modified.

The rule monitors AWS Kinesis Firehose logs @eventSource:firehose.amazonaws.com and detects when the @evt.name is UpdateDestination.

Determine if {{@userIdentity.arn}} is expected to perform the {{@evt.name}} API call on the account: {{@userIdentity.accountId}}.
If the API call was not made by the user, rotate the user credentials and investigate what other APIs were successfully accessed.
- Rotate the credentials.
- Investigate if the same credentials made other unauthorized API calls.