External guest invitation followed by Microsoft Entra ID PowerShell signin

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By default guests have capability to invite more external guest users, guests also can do suspicious Microsoft Entra ID enumeration. This detection look at guest users, who have been invited or have invited recently, who also are logging via various PowerShell CLI. Ref : 'https://danielchronlund.com/2021/11/18/scary-azure-ad-tenant-enumeration-using-regular-b2b-guest-accounts/

Attribute Value
Type Analytic Rule
Solution Microsoft Entra ID
ID acc4c247-aaf7-494b-b5da-17f18863878a
Severity Medium
Status Available
Kind Scheduled
Tactics InitialAccess, Persistence, Discovery
Techniques T1078.004, T1136.003, T1087.004
Required Connectors AzureActiveDirectory, AzureActiveDirectory
Source View on GitHub

Tables Used

This content item queries data from the following tables:

Table Selection Criteria Transformations Ingestion API Lake-Only
AADNonInteractiveUserSignInLogs ?
AuditLogs OperationName == "Invite external user" ?
SigninLogs ?

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