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MediumSplunk security contentBhavin Patel +1

AWS AMI Attribute Modification for Exfiltration

The following analytic detects suspicious modifications to AWS AMI attributes, such as sharing an AMI with another AWS account or making it publicly accessible. It leverages AWS CloudTrail logs to identify these…

Description

The following analytic detects suspicious modifications to AWS AMI attributes, such as sharing an AMI with another AWS account or making it publicly accessible. It leverages AWS CloudTrail logs to identify these changes by monitoring specific API calls. This activity is significant because adversaries can exploit these modifications to exfiltrate sensitive data stored in AWS resources. If confirmed malicious, this could lead to unauthorized access and potential data breaches, compromising the confidentiality and integrity of organizational information.

Detection logic

Detection requirements

Platform
IaaSOffice SuiteSaaS

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

Log source category
aws_cloudtrail_modifyimageattribute

Known benign triggers

  • It is possible that an AWS admin has legitimately shared a snapshot with others for a specific purpose.

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