Rachel Rice
4ae3ece314
Use correct case for `AssumeRoleWithSAML` event name. `UpdateFunctionConfiguration`, `UpdateFunctionConfiguration20150331` and `UpdateFunctionConfiguration20150331v2` are all valid event names for updating Lambda function configuration, added selection condition for any of these.
33 lines
1.3 KiB
YAML
33 lines
1.3 KiB
YAML
title: AWS Suspicious SAML Activity
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id: f43f5d2f-3f2a-4cc8-b1af-81fde7dbaf0e
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description: Identifies when suspicious SAML activity has occurred in AWS. An adversary could gain backdoor access via SAML.
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author: Austin Songer
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status: experimental
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date: 2021/09/22
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references:
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- https://docs.aws.amazon.com/IAM/latest/APIReference/API_UpdateSAMLProvider.html
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- https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRoleWithSAML.html
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logsource:
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service: cloudtrail
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detection:
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selection1:
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eventSource: sts.amazonaws.com
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eventName: AssumeRoleWithSAML
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selection2:
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eventSource: iam.amazonaws.com
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eventName: UpdateSAMLProvider
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condition: selection1 or selection2
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level: medium
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tags:
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- attack.initial_access
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- attack.t1078
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- attack.lateral_movement
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- attack.t1548
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- attack.privilege_escalation
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- attack.t1550
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- attack.t1550.001
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falsepositives:
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- Automated processes that uses Terraform may lead to false positives.
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- SAML Provider could be updated by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
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- SAML Provider being updated from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
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