How to find all actions/events that are able to create or modify a specific resource?

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How to find all actions/events that are able to create or modify a specific resource?

Below are 2 examples, however, the question is more general and applies to any resource:

  1. I tried to capture all events that are able to create/update api gateway stage for automatic WAF hooking. Initially, I identified 2 actions "CreateStage" and "UpdateStage" however, it turned out that apart from these 2 actions, the "CreateDeployment" action also is able to create stage without invoking the "CreateStage" event.

  2. When we run "ec2:RunInstance" it will also generate or trigger another API (and therefore resources), such as "AttachVolume".

Searching each of the possible actions based on type parameters such as "stageName" seems unobvious and inefficient. I am looking for a more efficient way to identify all events that may create or modify a particular resource.

1 Answer
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Hi, the most efficient way is usually CloudTrail: it registers all API calls for a given account. So, go to CloudTrail, extract a trace of all API calls on your period of interest. Then you can search on resource name and find all details about who did what when on this resource.

That's how I personally do when I have such a question.

Best,

Didier

profile pictureAWS
EXPERT
answered 10 months ago
  • Thank you for quick answer, unfortunately imho this method requires the action/event to be triggered first. In this way, I am not able to predict what resources will be created by actions that have not yet been triggered.

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