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MediumSplunk security contentGowthamaraj Rajendran +1

AWS Defense Evasion Update Cloudtrail

The following analytic detects `UpdateTrail` events in AWS CloudTrail logs. It identifies attempts to modify CloudTrail settings, potentially to evade logging. The detection leverages CloudTrail logs, focusing on…

Description

The following analytic detects `UpdateTrail` events in AWS CloudTrail logs. It identifies attempts to modify CloudTrail settings, potentially to evade logging. The detection leverages CloudTrail logs, focusing on `UpdateTrail` events where the user agent is not the AWS console and the operation is successful. This activity is significant because altering CloudTrail settings can disable or limit logging, hindering visibility into AWS account activities. If confirmed malicious, this could allow attackers to operate undetected, compromising the integrity and security of the AWS environment.

Detection logic

Detection requirements

Platform
IaaSIdentity ProviderOffice SuiteSaaS

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source category
aws_cloudtrail_updatetrail

Known benign triggers

  • While this search has no known false positives, it is possible that an AWS admin has updated cloudtrail logging. Please investigate this activity.

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