AWS IAM S3Browser User or AccessKey Creation

 1title: AWS IAM S3Browser User or AccessKey Creation
 2id: db014773-d9d9-4792-91e5-133337c0ffee
 3status: test
 4description: Detects S3 Browser utility creating IAM User or AccessKey.
 5references:
 6    - https://permiso.io/blog/s/unmasking-guivil-new-cloud-threat-actor
 7author: daniel.bohannon@permiso.io (@danielhbohannon)
 8date: 2023-05-17
 9tags:
10    - attack.execution
11    - attack.persistence
12    - attack.t1059.009
13    - attack.t1078.004
14logsource:
15    product: aws
16    service: cloudtrail
17detection:
18    selection:
19        eventSource: 'iam.amazonaws.com'
20        eventName:
21            - 'CreateUser'
22            - 'CreateAccessKey'
23        userAgent|contains: 'S3 Browser'
24    condition: selection
25falsepositives:
26    - Valid usage of S3 Browser for IAM User and/or AccessKey creation
27level: high

References

• Permiso | Blog | Unmasking GUI-Vil: Financially Motivated Cloud Threat Actor

  

  Permiso’s p0 Labs has been tracking a threat actor for the last 18 months. In this article we will describe the attack lifecycle and detection opportunities for the cloud-focused, financially motivated threat actor we have dubbed as p0-LUCR-1, aka GUI-vil (Goo-ee-vil).

  
  Read More

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