Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects changes to Entra ID Conditional Access policies that degrade security posture. This includes deleting a policy, disabling an enabled policy, removing grant controls (like MFA requirements), expanding trusted location/IP ranges, or adding user/group/role exclusions. Such activities are indicative of an attacker attempting to weaken authentication and security enforcement to maintain persistent access or facilitate further lateral movement.
Detects unauthorized modifications to Microsoft Entra Conditional Access (CA) policies, including deleting policies, disabling them, removing MFA requirements, or excluding specific users. These actions are common techniques used by adversaries to establish persistence or facilitate unauthorized access by weakening security controls.
This rule detects administrative changes to Conditional Access (CA) policies in Entra ID (Azure AD), specifically monitoring for the disabling of policies, transitioning them to report-only mode, or the removal of critical security grant controls such as MFA or Compliant Device requirements. It also alerts on the outright deletion of any CA policy, which could indicate an adversary attempting to bypass security controls or maintain persistent access.
Detects modifications to Microsoft Entra ID (formerly Azure AD) Conditional Access policies that lower security posture. This includes disabling an active policy, removing users or groups from enforcement scopes, or removing MFA requirements. Such actions are typical of an adversary attempting to maintain persistent access or evade authentication controls.
Detects modifications to Microsoft Entra ID (formerly Azure AD) Conditional Access policies that lower security posture. This includes disabling an active policy, removing users or groups from enforcement scopes, or removing MFA requirements. Such actions are typical of an adversary attempting to maintain persistent access or evade authentication controls.
This rule detects administrative changes to Conditional Access (CA) policies in Entra ID (Azure AD), specifically monitoring for the disabling of policies, transitioning them to report-only mode, or the removal of critical security grant controls such as MFA or Compliant Device requirements. It also alerts on the outright deletion of any CA policy, which could indicate an adversary attempting to bypass security controls or maintain persistent access.
Detects modifications or additions to Conditional Access policies or External Authentication Methods in Azure AD/Entra ID. These changes could be indicative of an adversary attempting to bypass multi-factor authentication or establish persistence by weakening authentication controls.
If your environment does not normally use smart cards or certificate-based authentication, or if a user who does not typically authenticate using smart cards suddenly generates events with TokenHasThisOrgCertificateSid, this may warrant investigation, as it could indicate authentication using a fraudulently issued certificate.
Detects modifications to Entra ID (Azure AD) Conditional Access policies where a user or group is explicitly added to an exclusion list. This behavior can be used by adversaries to bypass mandatory Multi-Factor Authentication (MFA) or device compliance requirements, facilitating persistence on a compromised account.
Detects Microsoft 365 sign-in patterns indicative of an adversary bypassing Conditional Access device compliance requirements using an edge appliance proxy. The rule identifies successful authentication sessions from non-compliant or unmanaged devices that satisfy Conditional Access, often involving impossible travel or multiple source IPs, suggesting the use of an intermediary infrastructure to masquerade as a trusted location.
This rule detects potential tampering with Conditional Access Policies in Azure Active Directory by monitoring for multiple update, delete, or add operations on policies containing 'Conditional Access' in their display name within a one-hour window. This could indicate an adversary attempting to weaken security controls to maintain access or bypass MFA.
Detects updates or deletions of Azure Active Directory (Entra ID) Conditional Access policies that occur outside of typical business hours (Monday-Friday 08:00-18:00 UTC). Such modifications can be an indicator of an adversary attempting to circumvent security controls or maintain persistent, unauthorized access.
Detects high volumes of sign-in failures or instances where Conditional Access policies are not applied, particularly for unregistered devices, indicating potential attempts to bypass security controls or perform brute-force attacks against cloud authentication.
Detects updates or deletions of Azure Active Directory (Entra ID) Conditional Access policies that occur outside of typical business hours (Monday-Friday 08:00-18:00 UTC). Such modifications can be an indicator of an adversary attempting to circumvent security controls or maintain persistent, unauthorized access.
Detects potential exploitation of CVE-2025-0309, where the Intune Company Portal application identifier is used to acquire Microsoft Graph tokens via a password grant mechanism while bypassing Multi-Factor Authentication (MFA). This technique typically relies on exploiting misconfigured Conditional Access policies that exclude the Intune resource from mandatory MFA enforcement.
Detects changes to Microsoft Entra (formerly Azure AD) Conditional Access policies. This includes additions, updates, or deletions of these security policies, which could indicate an attacker attempting to weaken authentication requirements, bypass multi-factor authentication, or establish persistence within the identity environment.
Detects updates or deletions of Azure Active Directory (Entra ID) Conditional Access policies that occur outside of typical business hours (Monday-Friday 08:00-18:00 UTC). Such modifications can be an indicator of an adversary attempting to circumvent security controls or maintain persistent, unauthorized access.
Detects changes to Microsoft Entra (formerly Azure AD) Conditional Access policies. This includes additions, updates, or deletions of these security policies, which could indicate an attacker attempting to weaken authentication requirements, bypass multi-factor authentication, or establish persistence within the identity environment.
Detects sign-in events where Conditional Access was not applied for Microsoft Graph access using low-privileged client IDs known to trigger hidden CA exclusions. Tokens issued with only single-factor authentication to Graph indicate exploitation of the hidden scope exclusion behavior introduced when any exclusion is added to an 'All resources' CA policy (CVE-2025-0309). Additionally, this rule identifies audit log events for Conditional Access policy modifications that add exclusions.
Detects updates or deletions of Azure Active Directory (Entra ID) Conditional Access policies that occur outside of typical business hours (Monday-Friday 08:00-18:00 UTC). Such modifications can be an indicator of an adversary attempting to circumvent security controls or maintain persistent, unauthorized access.
Detects high volumes of sign-in failures or instances where Conditional Access policies are not applied, particularly for unregistered devices, indicating potential attempts to bypass security controls or perform brute-force attacks against cloud authentication.
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