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Detect the possible exfiltration of an EBS snapshot.
This rule allows you to monitor CloudTrail and detect the following API calls within a 15 minute time window:
An attacker can create a EBS snapshot from the EBS volume and modify the permissions of the snapshot to allow it to be shared publicly or with another AWS account. Using an attacker-controlled account, a new EBS volume can be created from the snapshot and attached to an EC2 instance for analysis.
{{@userIdentity.arn}}
should have made the API calls.aws-cli
command modify-snapshot-attribute
.10 October 2022 - Updated query and severity.