Detection: EC2 AMI Shared Publicly

Overview

Detect when the launch permission of an Amazon Machine Image (AMI) was modified in your AWS environment. Changes to launch permissions, particularly sharing AMIs with external accounts, can expose sensitive configurations or proprietary software to unauthorized use. Monitoring these changes helps prevent unauthorized access and ensures secure AMI management.

References:

Usage

Run the detection in your terminal:

powerpipe detection run aws_cloudtrail_log_detections.detection.ec2_ami_shared_publicly

Snapshot and share results via Turbot Pipes:

powerpipe login
powerpipe detection run aws_cloudtrail_log_detections.detection.ec2_ami_shared_publicly --share

SQL

This detection uses a named query:

select
  tp_timestamp as timestamp,
string_split(event_source, '.')[1] || ':' || event_name as operation,
request_parameters ->> 'imageId' as resource,
user_identity.arn as actor,
tp_source_ip as source_ip,
tp_index as account_id,
aws_region as region,
tp_id as source_id,
*

from
  aws_cloudtrail_log
where
  event_source = 'ec2.amazonaws.com'
  and event_name = 'ModifyImageAttribute'
  and (request_parameters ->> 'attributeType') = 'launchPermission'
  and json_contains(
    (request_parameters -> 'launchPermission' -> 'add' -> 'items'),
    '{"group": "all"}'
  )
  and error_code is null

order by
  event_time desc;

Detection: EC2 AMI Shared Publicly

Overview

Usage

SQL

Tags