Detectionmediumtest

Users Authenticating To Other Azure AD Tenants

Detect when users in your Azure AD tenant are authenticating to other Azure AD Tenants.

Convert In Phoenix Studio

Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Launch

Mike DuddingtonCreated Thu Jun 305f521e4b-0105-4b72-845b-2198a54487b9cloud

Log Source

Azuresigninlogs

ProductAzure← raw: azure

Servicesigninlogs← raw: signinlogs

Detection Logic

detection:
    selection:
        Status: 'Success'
        HomeTenantId: 'HomeTenantID'
    filter:
        ResourceTenantId|contains: 'HomeTenantID'
    condition: selection and not filter

False Positives

If this was approved by System Administrator.

References

Resolving title…

learn.microsoft.com

MITRE ATT&CK

Tactics

TA0004 · Privilege Escalation TA0003 · Persistence TA0005 · Defense Evasion TA0001 · Initial Access

Sub-techniques

T1078.004 · Cloud Accounts

Rule Metadata

Rule ID

5f521e4b-0105-4b72-845b-2198a54487b9

Status

test

Level

medium

Type

Detection

Created

Thu Jun 30

Author

Mike Duddington

Path

rules/cloud/azure/signin_logs/azure_users_authenticating_to_other_azure_ad_tenants.yml

Raw Tags

attack.privilege-escalationattack.persistenceattack.defense-evasionattack.initial-accessattack.t1078.004

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