Suspicious New MFA Authenticator Registration via Azure AD (via azure)

ATT&CK techniques

Initial Access → Cred Access

Recon
Resource Dev
Initial Access
- T1078.002Domain Accounts
Execution
Persistence
- T1078.002Domain Accounts
- T1556Modify Authentication Process
Priv Esc
- T1078.002Domain Accounts
Defense Evasion
- T1078.002Domain Accounts
- T1556Modify Authentication Process
Cred Access
- T1556Modify Authentication Process
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects registration of new security information such as a Microsoft Authenticator app on an Azure AD identity, a persistence and MFA-bypass step used in the Jingle Thief campaign. The actors register a rogue authenticator to maintain access to compromised accounts. Detecting this registration surfaces attacker enrollment of unauthorized MFA methods after account takeover.

Reporting behind it

Related detections9 linkedT1556 — drag to rearrange

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Suspicious New MFA Authenticator Registration via Azure AD (via azure)

Pivot detection · T1556 · 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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