title: AWS PutBucketPolicy or RunInstances Possibly Using Exposed Access Key
id: 2f0b7c3e-6a41-4c1e-9b8a-1d2e3f4a5b02
status: experimental
description: Calls named in Railway's AWS guidance (RunInstances, PutBucketPolicy). Scope to keys that were stored in Railway.
references:
    - https://blog.railway.com/p/security-disclosure-recommendation-check-for-anomalous-aws-access
author: Defensive detection pack
date: 2026-10-22
tags:
    - attack.impact
    - attack.t1496
logsource:
    product: aws
    service: cloudtrail
detection:
    selection:
        eventName:
            - RunInstances
            - PutBucketPolicy
    condition: selection
falsepositives:
    - Normal deployments
level: low