Files
sigma-rules/rules/integrations/aws
Isai 590cc9cbbd [Tuning] First Occurrence of STS GetFederationToken Request by User (#5007)
Rule is executing as expected, however it is alerting on failed requests. Low alert telemetry.

This tuning:
- removed markdown and edited description to be more specific
- reduced execution window for 1 min lookback
- name change to add `AWS` consistent with all other rules
- added references that reflect in the wild threats and persistence usage
- increased risk_score and severity to medium accounting for usage as persistence mechanism in the wild
- added Persistence tag and Mitre tactic, technique, subtechnique
- added `event.outcome: success` criteria to query
- edited investigation guide to be more accurate reflection of steps required for investigating alert, including appropriate response action
- added highlighted fields
** Note: only IAMUser and Root user identities can call this actions so we can use `aws.cloudtrail.user_identity.arn` as the new terms field without worrying about Role vs Role + Session issue seen with other new_terms rules
2025-08-29 13:08:59 -04:00
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