AWS IAM S3Browser User or AccessKey Creation

title: AWS IAM S3Browser User or AccessKey Creation
id: db014773-d9d9-4792-91e5-133337c0ffee
status: test
description: Detects S3 Browser utility creating IAM User or AccessKey.
references:
    - https://permiso.io/blog/s/unmasking-guivil-new-cloud-threat-actor
author: [email protected] (@danielhbohannon)
date: 2023-05-17
tags:
    - attack.privilege-escalation
    - attack.execution
    - attack.persistence
    - attack.defense-evasion
    - attack.initial-access
    - attack.t1059.009
    - attack.t1078.004
logsource:
    product: aws
    service: cloudtrail
detection:
    selection:
        eventSource: 'iam.amazonaws.com'
        eventName:
            - 'CreateUser'
            - 'CreateAccessKey'
        userAgent|contains: 'S3 Browser'
    condition: selection
falsepositives:
    - Valid usage of S3 Browser for IAM User and/or AccessKey creation
level: high