Suspicious Token Request Using Microsoft Authentication Broker Client to Obtain Primary Refresh Token (via azure)

ATT&CK techniques

Persistence → Cred Access

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1098.005Device Registration
Priv Esc
- T1098.005Device Registration
Defense Evasion
Cred Access
- T1528Steal Application Access Token
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects token requests made through the Microsoft Authentication Broker client toward the Device Registration Service, the sequence Storm-2372 uses after harvesting device-code tokens to register an actor-controlled device and obtain a Primary Refresh Token. Adversaries leverage the broker client and a rogue device registration to gain durable access to a victim tenant, making this pairing a high-value detection for post-phishing persistence.

Reporting behind it

Related detections9 linkedT1528 — drag to rearrange

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Suspicious OAuth Application Consent in Microsoft Entra

Suspicious Token Request Using Microsoft Authentication Broker Client to Obtain Primary Refresh Token (via azure)

Pivot detection · T1528 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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