Credential Stuffing Attack on Azure
Set up the azure integration.
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Goal
Detect and identify the network IP address or user agent when multiple user accounts have login attempt activities recorded.
Strategy
Monitor Azure Active Directory and detect when any @evt.category is equal to SignInLogs and at least 5 of the @evt.outcome are equal to false by the same network IP address or user agent.
Security Signal returns MEDIUM if`@evt.outcomehas value ofsuccess` after 5 multiple failed logins by the same network IP address or user agent.
Triage and response
- Inspect the log and determine if this was a valid login attempt.
- If the user was compromised, rotate user credentials.
Changelog
- 14 June 2022 - Updated triggering cases to align with other credential stuffing rules. Also updated other backend options to reduce noise levels.
- 26 October 2022 - Updated query.
