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.

M365 Threat Intelligence Signal

Identifies Microsoft 365 audit logs generated for Threat Intelligence signals by Microsoft Defender for Office 365. This includes phishing and malware events, campaign-related threat detections, file-based threats in SharePoint, OneDrive, and Teams, as well as Microsoft Threat Intelligence Center (MSTIC) signals. These events provide early indicators of compromise attempts and can be correlated with other signals for threat hunting and detection.

M365 Purview DLP Signal

Identifies Microsoft 365 Data Loss Prevention (DLP) and Data Lifecycle Management (DLM) signals from Microsoft Purview across Exchange, SharePoint, OneDrive, and endpoint devices. These events indicate potential data exfiltration attempts, policy violations involving sensitive data, or unauthorized sharing of classified information. This building block rule generates security events for correlation, threat hunting, and telemetry collection to support detection of collection and exfiltration acti

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

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.

M365 Defender Alerts Signal (UAL)

Identifies alerts generated by Microsoft Defender products including Windows Defender for Endpoint (WDATP), Microsoft Cloud App Security (MCAS), Microsoft Defender for Identity, Microsoft 365 Defender custom detections, and Defender Experts for XDR via M365 Unified Audit Logs (UAL). These cross-platform alerts indicate detected threats across endpoints, cloud applications, and identity systems. This building block rule generates security events for correlation, threat hunting, and telemetry coll

M365 AIR Investigation Signal

Identifies Microsoft 365 Automated Investigation and Response (AIR) events including automated investigations, manual investigations, and admin-initiated actions. These events track Microsoft's automated threat response activities and can indicate active threats being remediated. This building block rule generates security events for correlation, threat hunting, and telemetry collection to provide visibility into automated response actions.

M365 Quarantine and Hygiene Signal

Identifies Microsoft 365 email quarantine, hygiene, and mail submission events. These signals indicate blocked threats, spam filtering actions, and user-reported suspicious emails. While these represent blocked or mitigated threats, they provide valuable telemetry for understanding attempted attacks and attack patterns. This building block rule generates security events for correlation, threat hunting, and telemetry collection.

M365 Identity Login from Impossible Travel Location

Detects successful Microsoft 365 portal logins from impossible travel locations. Impossible travel locations are defined as two different countries within a short time frame. This behavior may indicate an adversary attempting to access a Microsoft 365 account from a compromised account or a malicious actor attempting to access a Microsoft 365 account from a different location.

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

M365 Identity User Account Lockouts

Detects a burst of Microsoft 365 user account lockouts within a short 5-minute window. A high number of IdsLocked login errors across multiple user accounts may indicate brute-force attempts for the same users resulting in lockouts.

Deprecated - M365 Exchange DLP Policy Deleted

Identifies when a Data Loss Prevention (DLP) policy is removed in Microsoft 365. An adversary may remove a DLP policy to evade existing DLP monitoring.

M365 Exchange Mailbox High-Risk Permission Delegated

Identifies the assignment of rights to access content from another mailbox. An adversary may use the compromised account to send messages to other accounts in the network of the target organization while creating inbox rules, so messages can evade spam/phishing detection mechanisms.

Deprecated - Azure Entra Sign-in Brute Force Microsoft 365 Accounts by Repeat Source

Identifies potential brute-force attempts against Microsoft 365 user accounts by detecting a high number of failed interactive or non-interactive login attempts within a 30-minute window from a single source. Attackers may attempt to brute force user accounts to gain unauthorized access to Microsoft 365 services via different services such as Exchange, SharePoint, or Teams.

Deprecated - M365 Security Compliance Potential Ransomware Activity

Identifies when Microsoft Cloud App Security flags potential ransomware activity in Microsoft 365. This rule detects events where the Security Compliance Center reports a "Ransomware activity" or "Potential ransomware activity" alert, which may indicate file encryption, mass file modifications, or uploads of ransomware-infected files to cloud services such as SharePoint or OneDrive.

M365 Security Compliance Admin Signal

Identifies administrative actions in the Microsoft 365 Security & Compliance Center including cmdlet execution, RBAC changes, security insights, and user permission modifications. These events can indicate legitimate administrative activity or potential defense evasion through security control modifications such as DLP policy removal, compliance rule changes, or privilege escalation. This building block rule generates security events for correlation, threat hunting, and telemetry collection.

M365 Purview Insider Risk Signal

Identifies Microsoft Purview Insider Risk Management signals including alerts, cases, scoped user insights, HR signals, and physical badging signals. These events indicate potential insider threats, compromised user accounts, or anomalous user behavior patterns detected by Microsoft's behavioral analytics. This building block rule generates security events for correlation, threat hunting, and telemetry collection to support detection of insider threats and account compromise.

M365 Identity User Brute Force Attempted

Identifies brute-force authentication activity targeting Microsoft 365 user accounts using failed sign-in patterns that match password spraying, credential stuffing, or password guessing behavior. Adversaries may attempt brute-force authentication with credentials obtained from previous breaches, leaks, marketplaces or guessable passwords.

M365 Purview Security Compliance Signal

Collects alerts generated by Microsoft Purview (formerly Office 365 Security & Compliance Center) through the SecurityComplianceCenter provider. These alerts represent policy violations, compliance issues, and threats detected by Microsoft Purview's built-in detection capabilities including DLP policy matches, eDiscovery actions, retention policy violations, and other compliance-related events. This building block rule generates security events for correlation, threat hunting, and telemetry coll

M365 Identity OAuth Illicit Consent Grant by Rare Client and User

Identifies an Microsoft 365 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 in Microsoft 365. 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 in Microsoft 365 on-be

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

M365 Exchange Inbox Forwarding Rule Created

Identifies when a new Inbox forwarding rule is created in Microsoft 365. Inbox rules process messages in the Inbox based on conditions and take actions. In this case, the rules will forward the emails to a defined address. Attackers can abuse Inbox Rules to intercept and exfiltrate email data without making organization-wide configuration changes or having the corresponding privileges.

M365 OneDrive/SharePoint Excessive File Downloads

Identifies when an excessive number of files are downloaded from OneDrive or SharePoint by an authorized user or application in a short period of time. This may indicate a potential data exfiltration event, especially if the downloads are performed using OAuth authentication which could suggest an OAuth phishing attack such as Device Code Authentication phishing.

M365 Exchange Anti-Phish Policy Deleted

Identifies the deletion of an anti-phishing policy in Microsoft 365. By default, Microsoft 365 includes built-in features that help protect users from phishing attacks. Anti-phishing polices increase this protection by refining settings to better detect and prevent attacks.

M365 Exchange Anti-Phish Rule Modification

Identifies the modification of an anti-phishing rule in Microsoft 365. By default, Microsoft 365 includes built-in features that help protect users from phishing attacks. Anti-phishing rules increase this protection by refining settings to better detect and prevent attacks.