{"id":"4ad97bf5-a514-41a4-abd3-4f3455ad4865","title":"Guest Users Invited To Tenant By Non Approved Inviters","description":"Detects guest users being invited to tenant by non-approved inviters","author":"MikeDuddington, '@dudders1'","status":"test","level":"medium","date":"2022-07-28","modified":"","tags":["attack.privilege-escalation","attack.persistence","attack.initial-access","attack.stealth","attack.t1078"],"technique_ids":["T1078"],"logsource":{"product":"azure","service":"auditlogs"},"falsepositives":["If this was approved by System Administrator."],"references":["https://learn.microsoft.com/en-gb/entra/architecture/security-operations-user-accounts#monitoring-external-user-sign-ins"],"source_path":"rules/cloud/azure/audit_logs/azure_ad_guest_users_invited_to_tenant_by_non_approved_inviters.yml","source_sha256":"a5c536d0358e86a0e8dd5cde423eba29be7e4ddbdbc2cec232b1dba7957a26a0","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/azure/audit_logs/azure_ad_guest_users_invited_to_tenant_by_non_approved_inviters.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Guest Users Invited To Tenant By Non Approved Inviters\nid: 4ad97bf5-a514-41a4-abd3-4f3455ad4865\nstatus: test\ndescription: Detects guest users being invited to tenant by non-approved inviters\nreferences:\n    - https://learn.microsoft.com/en-gb/entra/architecture/security-operations-user-accounts#monitoring-external-user-sign-ins\nauthor: MikeDuddington, '@dudders1'\ndate: 2022-07-28\ntags:\n    - attack.privilege-escalation\n    - attack.persistence\n    - attack.initial-access\n    - attack.stealth\n    - attack.t1078\nlogsource:\n    product: azure\n    service: auditlogs\ndetection:\n    selection:\n        Category: 'UserManagement'\n        OperationName: 'Invite external user'\n    filter:\n        InitiatedBy|contains: '<approved guest inviter use OR for multiple>'\n    condition: selection and not filter\nfalsepositives:\n    - If this was approved by System Administrator.\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1078","id":"T1078","name":"Valid Accounts","page":"techniques/enterprise/T1078/"}],"data_path":"data/detection-rules/4ad97bf5-a514-41a4-abd3-4f3455ad4865.json","kind":"sigma"}