Unfamiliar IAM user retrieved SSM parameter

cloudtrail

Classification:

attack

Tactic:

TA0006-credential-access

Technique:

T1555-credentials-from-password-stores

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Goal

Detect when data about one or more parameters is retrieved from AWS Systems Manager.

Strategy

This rule lets you monitor CloudTrail and detect when data about one or more parameters is retrieved from AWS Systems Manager with one of the following API calls:

This rule uses the New Value detection method. Datadog learns the historical behavior of the identities within your environment, then creates a signal when unfamiliar values appear.

Triage and response

  1. Determine if {{@userIdentity.arn}} is expected to perform the {{@evt.name}} API call on the parameter {{@resource.ARN}}.
  2. If the action is legitimate, consider including the user in a suppression list. See Best practices for creating detection rules with Datadog Cloud SIEM for more information.
  3. Otherwise, if the results of the triage indicate that an attacker has taken the action, begin your company’s incident response process and an investigation.