Suspicious Entra ID Device Code Flow Authentication

ATT&CK techniques

Cred Access

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1528Steal Application Access Token
- T1621Multi-Factor Authentication Request Generation
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects Entra ID sign-ins performed through the OAuth device code flow which threat actors abuse in device code phishing campaigns to trick users into authorizing attacker-controlled sessions and obtain tokens for apps such as Azure AD PowerShell and the Microsoft Authentication Broker. Device code authentications with inconsistent user agent and location across a shared session are a hallmark of this phishing technique.

Reporting behind it

Related detections9 linkedT1528 — drag to rearrange

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Suspicious Salesforce Connected App OAuth Authorization from VPN Egress

Suspicious M365 Device Code Authentication Flow via m365

Possible Illicit Consent Grant to OAuth Application via Azure AD

Suspicious Device Code Authentication via Microsoft Authentication Broker

Suspicious OAuth Device Code Sign-In to Authentication Broker via Tycoon 2FA

Suspicious Entra ID Device Code Flow Authentication

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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