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LowMicrosoft Sentinel analytics

Failed login attempts to Azure Portal

Identifies failed login attempts in the Microsoft Entra ID SigninLogs to the Azure Portal. Many failed logon attempts or some failed logon attempts from multiple IPs could indicate a potential brute force attack.…

Description

Identifies failed login attempts in the Microsoft Entra ID SigninLogs to the Azure Portal. Many failed logon attempts or some failed logon attempts from multiple IPs could indicate a potential brute force attack. The following are excluded due to success and non-failure results: References: https://docs.microsoft.com/azure/active-directory/reports-monitoring/reference-sign-ins-error-codes 0 - successful logon 50125 - Sign-in was interrupted due to a password reset or password registration entry. 50140 - This error occurred due to 'Keep me signed in' interrupt when the user was signing-in.

Detection logic

Detection requirements

Platform
ContainersESXiIaaSIdentity ProviderLinuxmacOSNetwork DevicesOffice SuiteSaaSWindows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source product
azureactivedirectory
Log source service
aadnoninteractiveusersigninlogssigninlogs

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