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HighMicrosoft Sentinel analytics

Speculus - Sign-in attempt from high-risk IP indicator

Matches Microsoft Entra ID sign-in attempts against high-risk Speculus IP indicators (risk score >= 75) received in the last 14 days. A sign-in from a known C2, botnet, or brute-force source IP may indicate…

Description

Matches Microsoft Entra ID sign-in attempts against high-risk Speculus IP indicators (risk score >= 75) received in the last 14 days. A sign-in from a known C2, botnet, or brute-force source IP may indicate credential theft or account takeover.

Detection logic

Detection requirements

Platform
ContainersESXiIaaSIdentity ProviderLinuxmacOSNetwork DevicesOffice SuiteSaaSWindows

The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.

Log source product
azureactivedirectoryspeculusthreatintel
Log source service
signinlogsspeculus_indicators_cl

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