Introducing New Entra QR Code Authentication Method

Microsoft Entra’s new QR code authentication simplifies sign-ins for Microsoft 365, eliminating SMS or voice call delays. This secure method uses a QR code with a PIN, making it ideal for frontline workers and shared devices.

🔗 Reference: Microsoft Entra QR Code Authentication

You Should Know:

1. How QR Code Authentication Works

• User opens Microsoft Authenticator app and selects “Sign in with QR code.”
• Scans the QR code displayed on the login screen.
• Enters a dynamically generated PIN for verification.

2. Enabling QR Code Auth in Microsoft Entra

<h1>Connect to Microsoft Graph (PowerShell)</h1>

Connect-MgGraph -Scopes "Policy.ReadWrite.ConditionalAccess"

<h1>Enable QR code authentication policy</h1>

New-MgIdentityConditionalAccessPolicy -DisplayName "QR Code Auth Policy" ` 
-State "enabled" ` 
-Conditions @{ 
Applications = @{IncludeApplications = "All"} 
Users = @{IncludeUsers = "All"} 
} ` 
-GrantControls @{ 
BuiltInControls = @("qrCode") 
Operator = "OR" 
} 

3. Linux Command to Generate QR Codes (For Testing)

<h1>Install qrencode (Linux)</h1>

sudo apt install qrencode

<h1>Generate a QR code for a test URL</h1>

qrencode -o auth_qr.png "https://entra.microsoft.com/auth?code=EXAMPLE123" 

#### **4. Windows Command to Check Authentication Logs**

<h1>Check Microsoft 365 sign-in logs (PowerShell)</h1>

Get-MgAuditLogSignIn -Filter "startsWith(appDisplayName, 'Microsoft Authenticator')" 

#### **5. Security Best Practices**

• Enable Conditional Access: Restrict QR auth to trusted locations.
• Monitor Failed Attempts:

  </li>
  </ul>
  
  <h1>Azure Sentinel KQL Query</h1>
  
  SigninLogs 
  | where ResultType == "53003" 
  | project TimeGenerated, UserPrincipalName, DeviceDetail 
  

  ### **What Undercode Say**

  QR code authentication enhances convenience but requires strict monitoring. Use conditional access policies to prevent misuse. For Linux admins, `qrencode` helps simulate QR workflows, while Windows admins should audit logs via Get-MgAuditLogSignIn. Always pair QR auth with PIN enforcement for layered security.

  ### **Expected Output:**

  • Enabled QR code authentication in Entra ID.
  • Generated test QR codes via qrencode.
  • Reviewed sign-in logs for suspicious activity.
  • Enforced Conditional Access policies.

  References:

  Reported By: Jake Admindroid – Hackers Feeds
  Extra Hub: Undercode MoN
  Basic Verification: Pass ✅

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