Sigma Rules
3,332 rules found
Windows LAPS Credential Dump From Entra ID
Detects when an account dumps the LAPS password from Entra ID.
Change to Authentication Method
Change to authentication method could be an indicator of an attacker adding an auth method to the account so they can have continued access.
Azure Domain Federation Settings Modified
Identifies when an user or application modified the federation settings on the domain.
User Added To Group With CA Policy Modification Access
Monitor and alert on group membership additions of groups that have CA policy modification access
User Removed From Group With CA Policy Modification Access
Monitor and alert on group membership removal of groups that have CA policy modification access
Guest User Invited By Non Approved Inviters
Detects when a user that doesn't have permissions to invite a guest user attempts to invite one.
User State Changed From Guest To Member
Detects the change of user type from "Guest" to "Member" for potential elevation of privilege.
PIM Approvals And Deny Elevation
Detects when a PIM elevation is approved or denied. Outside of normal operations should be investigated.
PIM Alert Setting Changes To Disabled
Detects when PIM alerts are set to disabled.
Changes To PIM Settings
Detects when changes are made to PIM roles
User Added To Privilege Role
Detects when a user is added to a privileged role.
Bulk Deletion Changes To Privileged Account Permissions
Detects when a user is removed from a privileged role. Bulk changes should be investigated.
Privileged Account Creation
Detects when a new admin is created.
Azure Subscription Permission Elevation Via AuditLogs
Detects when a user has been elevated to manage all Azure Subscriptions. This change should be investigated immediately if it isn't planned. This setting could allow an attacker access to Azure subscriptions in your environment.
Temporary Access Pass Added To An Account
Detects when a temporary access pass (TAP) is added to an account. TAPs added to priv accounts should be investigated
User Risk and MFA Registration Policy Updated
Detects changes and updates to the user risk and MFA registration policy. Attackers can modified the policies to Bypass MFA, weaken security thresholds, facilitate further attacks, maintain persistence.
Multi Factor Authentication Disabled For User Account
Detects changes to the "StrongAuthenticationRequirement" value, where the state is set to "0" or "Disabled". Threat actors were seen disabling multi factor authentication for users in order to maintain or achieve access to the account. Also see in SIM Swap attacks.
Password Reset By User Account
Detect when a user has reset their password in Azure AD
Anomalous Token
Indicates that there are abnormal characteristics in the token such as an unusual token lifetime or a token that is played from an unfamiliar location.
Anomalous User Activity
Indicates that there are anomalous patterns of behavior like suspicious changes to the directory.
Activity From Anonymous IP Address
Identifies that users were active from an IP address that has been identified as an anonymous proxy IP address.
Anonymous IP Address
Indicates sign-ins from an anonymous IP address, for example, using an anonymous browser or VPN.
Atypical Travel
Identifies two sign-ins originating from geographically distant locations, where at least one of the locations may also be atypical for the user, given past behavior.
Impossible Travel
Identifies user activities originating from geographically distant locations within a time period shorter than the time it takes to travel from the first location to the second.
Suspicious Inbox Forwarding Identity Protection
Indicates suspicious rules such as an inbox rule that forwards a copy of all emails to an external address
Suspicious Inbox Manipulation Rules
Detects suspicious rules that delete or move messages or folders are set on a user's inbox.
Azure AD Account Credential Leaked
Indicates that the user's valid credentials have been leaked.
Malicious IP Address Sign-In Failure Rate
Indicates sign-in from a malicious IP address based on high failure rates.
Malicious IP Address Sign-In Suspicious
Indicates sign-in from a malicious IP address known to be malicious at time of sign-in.
Sign-In From Malware Infected IP
Indicates sign-ins from IP addresses infected with malware that is known to actively communicate with a bot server.
New Country
Detects sign-ins from new countries. The detection considers past activity locations to determine new and infrequent locations.
Password Spray Activity
Indicates that a password spray attack has been successfully performed.
Primary Refresh Token Access Attempt
Indicates access attempt to the PRT resource which can be used to move laterally into an organization or perform credential theft
Suspicious Browser Activity
Indicates anomalous behavior based on suspicious sign-in activity across multiple tenants from different countries in the same browser
Azure AD Threat Intelligence
Indicates user activity that is unusual for the user or consistent with known attack patterns.
SAML Token Issuer Anomaly
Indicates the SAML token issuer for the associated SAML token is potentially compromised. The claims included in the token are unusual or match known attacker patterns
Unfamiliar Sign-In Properties
Detects sign-in with properties that are unfamiliar to the user. The detection considers past sign-in history to look for anomalous sign-ins.
Stale Accounts In A Privileged Role
Identifies when an account hasn't signed in during the past n number of days.
Invalid PIM License
Identifies when an organization doesn't have the proper license for PIM and is out of compliance.
Roles Assigned Outside PIM
Identifies when a privilege role assignment has taken place outside of PIM and may indicate an attack.
Roles Activated Too Frequently
Identifies when the same privilege role has multiple activations by the same user.
Roles Are Not Being Used
Identifies when a user has been assigned a privilege role and are not using that role.
Roles Activation Doesn't Require MFA
Identifies when a privilege role can be activated without performing mfa.
Too Many Global Admins
Identifies an event where there are there are too many accounts assigned the Global Administrator role.
Account Lockout
Identifies user account which has been locked because the user tried to sign in too many times with an incorrect user ID or password.
Successful Authentications From Countries You Do Not Operate Out Of
Detect successful authentications from countries you do not operate out of.
Increased Failed Authentications Of Any Type
Detects when sign-ins increased by 10% or greater.
Measurable Increase Of Successful Authentications
Detects when successful sign-ins increased by 10% or greater.