Browse Rules

Entra ID Sign-in BloodHound Suite User-Agent Detected

Identifies potential enumeration activity using AzureHound, SharpHound, or BloodHound across Microsoft cloud services. These tools are often used by red teamers and adversaries to map users, groups, roles, applications, and access relationships within Microsoft Entra ID (Azure AD) and Microsoft 365.

Entra ID Kali365 Default User-Agent Detected

Identifies the default user agent string associated with Kali365 (also referred to as Kali365 Live), a phishing-as-a-service (PhaaS) platform that automates OAuth 2.0 device code phishing and adversary-in-the-middle (AiTM) session capture against Microsoft 365 and Microsoft Entra ID. The Kali365 Electron desktop client identifies itself with the user agent `kali365-live/1.0.0` when polling for and replaying captured OAuth tokens, so its appearance in Entra ID sign-in logs, Entra ID audit logs, o

Entra ID Conditional Access Policy (CAP) Modified

Identifies a modification to a conditional access policy (CAP) in Microsoft Entra ID. Adversaries may modify existing CAPs to loosen access controls and maintain persistence in the environment with a compromised identity or entity.

Entra ID Protection User Alert and Device Registration

Identifies sequence of events where a Microsoft Entra ID protection alert is followed by an attempt to register a new device by the same user principal. This behavior may indicate an adversary using a compromised account to register a device, potentially leading to unauthorized access to resources or persistence in the environment.

Entra ID MFA Disabled for User

Identifies when multi-factor authentication (MFA) is disabled for an Entra ID user account. An adversary may disable MFA for a user account in order to weaken the authentication requirements for the account.

M365 or Entra ID Identity Sign-in from a Suspicious Source

This rule correlate Entra-ID or Microsoft 365 mail successful sign-in events with network security alerts by source address. Adversaries may trigger some network security alerts such as reputation or other anomalies before accessing cloud resources.

Entra ID Sign-in TeamFiltration User-Agent Detected

Identifies potential enumeration or password spraying activity using TeamFiltration tool. TeamFiltration is an open-source enumeration, password spraying and exfiltration tool designed for Entra ID and Microsoft 365. Adversaries are known to use TeamFiltration in-the-wild to enumerate users, groups, and roles, as well as to perform password spraying attacks against Microsoft Entra ID and Microsoft 365 accounts. This rule detects the use of TeamFiltration by monitoring for specific user-agent str

Entra ID Global Administrator Role Assigned

In Microsoft Entra ID, permissions to manage resources are assigned using roles. The Global Administrator is a role that enables users to have access to all administrative features in Microsoft Entra ID and services that use Microsoft Entra ID identities like the Microsoft 365 Defender portal, the Microsoft 365 compliance center, Exchange, SharePoint Online, and Skype for Business Online. Attackers can add users as Global Administrators to maintain access and manage all subscriptions and their s

Entra ID Service Principal Credentials Created by Unusual User

Identifies when new Service Principal credentials have been added in Microsoft Entra ID. In most organizations, credentials will be added to service principals infrequently. Hijacking an application (by adding a rogue secret or certificate) with granted permissions will allow the attacker to access data that is normally protected by MFA requirements.

Entra ID Service Principal Created

Identifies when a new service principal is added in Microsoft Entra ID. An application, hosted service, or automated tool that accesses or modifies resources needs an identity created. This identity is known as a service principal. For security reasons, it's always recommended to use service principals with automated tools rather than allowing them to log in with a user identity.

Entra ID OAuth Application Redirect URI Modified

Identifies modifications to OAuth application redirect URIs (ReplyUrls) in Entra ID. Adding an attacker-controlled redirect URI to an existing trusted application allows interception of OAuth authorization codes when users authenticate through that application's normal login flow, enabling token theft without requiring a new application registration or consent event.

Entra ID Protection Alerts for User Detected

Identifies more than two Microsoft Entra ID Protection alerts associated to the user principal in a short time period. Microsoft Entra ID Protection alerts are triggered by suspicious sign-in activity, such as anomalous IP addresses, risky sign-ins, or other risk detections. Multiple alerts in a short time frame may indicate an ongoing attack or compromised account.

Entra ID AiTM Phishing-Kit Chain Detected

Identifies a Microsoft Entra ID identity-compromise chain in which a single user, within a 10-minute window, authenticates to the Device Registration Service through the Microsoft Authentication Broker (MAB) client, registers a device, and then uses the resulting Primary Refresh Token (PRT) to access a resource other than the Device Registration Service. This sequence is the core post-adversary-in-the-middle (AiTM) persistence pattern used by phishing kits such as Tycoon2FA and Kali365: after ca

Entra ID High Risk Sign-in

Identifies high risk Microsoft Entra ID sign-ins by leveraging Microsoft's Identity Protection machine learning and heuristics. Identity Protection categorizes risk into three tiers: low, medium, and high. While Microsoft does not provide specific details about how risk is calculated, each level brings higher confidence that the user or sign-in is compromised.

Entra ID Protection - Risk Detection

Identifies Microsoft Entra ID Protection sign-in risk detections triggered by a range of risk events such as anonymized IP addresses, password spray attacks, impossible travel, token anomalies, and more. These detections are often early indicators of potential account compromise or malicious sign-in behavior. This is a promotion rule intended to surface all Entra ID sign-in risk events for further investigation and correlation with other identity-related activity. This is a building block rule t

Entra ID OAuth User Impersonation to Microsoft Graph

Identifies potential session hijacking or token replay in Microsoft Entra ID. This rule detects cases where a user signs in and subsequently accesses Microsoft Graph from a different IP address using the same session ID. This may indicate a successful OAuth phishing attack, session hijacking, or token replay attack, where an adversary has stolen a session cookie or refresh/access token and is impersonating the user from an alternate host or location.

Entra ID User Reported Suspicious Activity

Identifies suspicious activity reported by users in Microsoft Entra ID where users have reported suspicious activity related to their accounts, which may indicate potential compromise or unauthorized access attempts. Reported suspicious activity typically occurs during the authentication process and may involve various authentication methods, such as password resets, account recovery, or multi-factor authentication challenges. Adversaries may attempt to exploit user accounts by leveraging social

M365 Entra ID Risk Detection Signal

Identifies Microsoft Entra ID (formerly Azure AD) risk detection signals including risky sign-ins, compromised credentials, impossible travel, and other identity-based anomalies. These events indicate potential credential compromise, account takeover attempts, or suspicious authentication patterns detected by Microsoft's identity protection. This building block rule generates security events for correlation, threat hunting, and telemetry collection to support detection of credential access and i

Entra ID Actor Token User Impersonation Abuse

Identifies potential abuse of actor tokens in Microsoft Entra ID audit logs. Actor tokens are undocumented backend mechanisms used by Microsoft for service-to-service (S2S) operations, allowing services to perform actions on behalf of users. These tokens appear in logs with the service's display name but the impersonated user's UPN. While some legitimate Microsoft operations use actor tokens, unexpected usage may indicate exploitation of CVE-2025-55241, which allowed unauthorized access to Azure

Entra ID OAuth Phishing via First-Party Microsoft Application

Detects potentially suspicious OAuth authorization activity in Microsoft Entra ID where first-party Microsoft applications from the FOCI (Family of Client IDs) group request access to Microsoft Graph or legacy Azure AD resources. Developer tools like Azure CLI, Visual Studio Code, and Azure PowerShell accessing these resources are flagged, as they are commonly abused in phishing campaigns like ConsentFix. Additionally, any FOCI family application accessing the deprecated Windows Azure Active Dir

Entra ID Excessive Account Lockouts Detected

Identifies a high count of failed Microsoft Entra ID sign-in attempts as the result of the target user account being locked out. Adversaries may attempt to brute-force user accounts by repeatedly trying to authenticate with incorrect credentials, leading to account lockouts by Entra ID Smart Lockout policies.

Entra ID Illicit Consent Grant via Registered Application

Identifies an illicit consent grant request on-behalf-of a registered Entra ID application. Adversaries may create and register an application in Microsoft Entra ID for the purpose of requesting user consent to access resources. This is accomplished by tricking a user into granting consent to the application, typically via a pre-made phishing URL. This establishes an OAuth grant that allows the malicious client applocation to access resources on-behalf-of the user.

Entra ID User Sign-in with Unusual Authentication Type

Identifies rare instances of authentication methods for Microsoft Entra ID principal users. An adversary with stolen credentials may attempt to authenticate with an unusual method, which may indicate an attempt to bypass conditional access policies (CAP) and multi-factor authentication (MFA) requirements. The authentication method may not be commonly used by the user based on their historical sign-in activity.

Entra ID Register Device with Unusual User Agent (Azure AD Join)

Detects successful Microsoft Entra ID audit events for Register device where additional details indicate an Azure AD join and the recorded user agent is not one of the common native registration clients (Dsreg, DeviceRegistrationClient, or Dalvik-based Android enrollment). Legitimate Windows and standard mobile enrollment flows often present predictable user-agent strings; unexpected clients may reflect scripted registration, third-party tooling, or adversary-driven device registration used for

Entra ID Unusual Cloud Device Registration

Detects a sequence of events in Microsoft Entra ID indicative of suspicious cloud-based device registration via automated tooling like ROADtools or similar frameworks. This behavior involves adding a device via the Device Registration Service, followed by the assignment of registered users and owners — a pattern consistent with techniques used to establish persistence or acquire a Primary Refresh Token (PRT). ROADtools and similar tooling leave distinct telemetry signatures such as the `Microsof