Elastic low stable kql

AWS CloudTrail Log Created

Detects creation of a new AWS CloudTrail trail via CreateTrail API. While legitimate during onboarding or auditing improvements, adversaries can create trails that write to attacker-controlled destinations, limit regions, or otherwise subvert monitoring objectives. New trails should be validated for destination ownership, encryption, multi-region coverage, and organizational scope.

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Detection Logic

data_stream.dataset: "aws.cloudtrail" 
    and event.provider: "cloudtrail.amazonaws.com" 
    and event.action: "CreateTrail" 
    and event.outcome: "success"

False Positives

⚠ Trail creations may be made by a system or network administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. Trail creations by unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

Field Validations

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