AWS Console GetSigninToken Potential Abuse

calendar Feb 26, 2024 · attack.lateral_movement attack.t1021.007 attack.t1550.001  ·
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Detects potentially suspicious events involving "GetSigninToken". An adversary using the "aws_consoler" tool can leverage this console API to create temporary federated credential that help obfuscate which AWS credential is compromised (the original access key) and enables the adversary to pivot from the AWS CLI to console sessions without the need for MFA using the new access key issued in this request.

Sigma rule (View on GitHub)

 1title: AWS Console GetSigninToken Potential Abuse
 2id: f8103686-e3e8-46f3-be72-65f7fcb4aa53
 3status: experimental
 4description: |
 5    Detects potentially suspicious events involving "GetSigninToken".
 6    An adversary using the "aws_consoler" tool can leverage this console API to create temporary federated credential that help obfuscate which AWS credential is compromised (the original access key) and enables the adversary to pivot from the AWS CLI to console sessions without the need for MFA using the new access key issued in this request.    
 7references:
 8    - https://github.com/NetSPI/aws_consoler
 9    - https://www.crowdstrike.com/blog/analysis-of-intrusion-campaign-targeting-telecom-and-bpo-companies/
10author: Chester Le Bron (@123Le_Bron)
11date: 2024/02/26
12tags:
13    - attack.lateral_movement
14    - attack.t1021.007
15    - attack.t1550.001
16logsource:
17    product: aws
18    service: cloudtrail
19detection:
20    selection:
21        eventSource: 'signin.amazonaws.com'
22        eventName: 'GetSigninToken'
23    filter_main_console_ua:
24        userAgent|contains: 'Jersey/${project.version}'
25    condition: selection and not 1 of filter_main_*
26falsepositives:
27    - GetSigninToken events will occur when using AWS SSO portal to login and will generate false positives if you do not filter for the expected user agent(s), see filter. Non-SSO configured roles would be abnormal and should be investigated.
28level: medium

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