Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
597 detections
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Detects when an organization member or an outside collaborator is added to or removed from a project board or has their permission level changed or when an owner removes an outside collaborator from an organization or when two-factor authentication is required in an organization and an outside collaborator does not use 2FA or disables 2FA.
Detects the modification of a user group on a Fortinet FortiGate Firewall. This activity could be used by an attacker to grant themselves or other malicious accounts VPN access to a network, facilitating persistence or privilege escalation.
This rule detects when a user account in OneLogin is locked or suspended, either through the API or other system actions. This could indicate an attempt to disrupt user access or a response to suspicious activity.
Detects the registration of a new device or MFA authentication method in Microsoft Entra ID from an IP address geolocated to Morocco. This is a persistence tactic used by the Jingle Thief group (also tracked as Atlas Lion and STORM-0539).
This rule detects modifications to Active Directory user accounts that could enable an attacker to control another user's or computer's account without needing their credentials. Specifically, it looks for changes to attributes related to delegation, such as 'msDS-AllowedToDelegateTo' and 'msDS-AllowedToActOnBehalfOfOtherIdentity', or the 'servicePrincipalName' attribute for user objects, which can be abused for Kerberoasting or other delegation attacks. Event ID 4738 indicates a user account was changed, and Event ID 5136 indicates a directory service object was modified.
Detects the renaming of an existing computer account to an account name that doesn't contain a '$' symbol, which is a key indicator of the CVE-2021-42287 (SamAccountName Spoofing) attack. This technique is often used to impersonate a Domain Controller.
Identifies when a user grants permissions to another user on Azure resources. The rule specifically looks for the 'Microsoft.Authorization/roleAssignments/write' operation in Azure Activity Logs, which indicates a role assignment creation or modification. This can be an indicator of privilege escalation or persistence.
This rule detects when a user's account type is changed from 'Guest' to 'Member' within Azure Active Directory. This change signifies an elevation of privileges for the user, as 'Member' accounts typically have broader access and capabilities compared to 'Guest' accounts. Such a modification could be an indicator of an adversary attempting to gain higher privileges or establish persistence within the cloud environment.
This rule detects the creation or modification of local user accounts and changes to remote authentication configurations on Cisco devices. It specifically looks for keywords 'username' and 'aaa' in Cisco AAA logs, indicating actions related to account management or authentication settings.
Detects activity when an AWS user's login profile (password) is modified by another user. This can indicate an attacker with the "iam:UpdateLoginProfile" permission is changing passwords on behalf of other users to gain access to the AWS console.
Detects when a Google Workspace user is granted administrative privileges. This could indicate a legitimate administrative action or a malicious attempt to escalate privileges within the Google Workspace environment.
This rule detects when a user registers security information, which indicates a change to their authentication method. This could be an attacker adding an authentication method to a compromised account to maintain persistent access.
This rule detects the use of PowerShell cmdlets from the 'Microsoft.PowerShell.LocalAccounts' module, which are used to manipulate local user accounts. This includes actions such as disabling, enabling, getting information about, setting properties of, creating, renaming, and removing local users. Adversaries may manipulate accounts to maintain access to victim systems, modify credentials, or change permission groups.
Detects when a user successfully resets their own password within Azure Active Directory. This rule specifically looks for 'UserManagement' category events with a 'Success' status, initiated by a 'UPN' (User Principal Name) and targeting a 'UPN' with an 'ActivityType' containing 'Password reset'.
Detects attempts to change the password of the Directory Services Restore Mode (DSRM) administrator account. This account is a local administrator account on Domain Controllers, and attackers may modify its password to establish persistence or elevate privileges.
Detects when an user account is locked or suspended.
This analytic identifies the modification of the SourceAnchor (ImmutableId) attribute for an Azure Active Directory user. This detection leverages Azure AD audit logs, specifically monitoring the "Update user" operation and changes to the SourceAnchor attribute. This activity is significant as it is a step in setting up an Azure AD identity federation backdoor, allowing an adversary to establish persistence. If confirmed malicious, the attacker could impersonate any user, bypassing password and MFA requirements, leading to unauthorized access and potential data breaches.
This KQL query detects the activation or modification of Guest accounts or Guest group memberships, which may indicate unauthorized access attempts or privilege escalation.
Analysts should review the initiating user (SubjectUserName) and process context. Confirm whether the Guest account is expected to be active on the system. Investigate the host for signs of lateral movement or privilege abuse. Correlate with logon events and group membership changes. Escalate if Guest account activation is unexpected or unauthorized.
Analysts should review the initiating user (SubjectUserName) and process context. Confirm whether the Guest account is expected to be active on the system. Investigate the host for signs of lateral movement or privilege abuse. Correlate with logon events and group membership changes. Escalate if Guest account activation is unexpected or unauthorized.
Detects activity when someone is changing passwords on behalf of other users.
An attacker with the "iam:UpdateLoginProfile" permission on other users can change the password used to login to the AWS console on any user that already has a login profile setup.
An attacker with the "iam:UpdateLoginProfile" permission on other users can change the password used to login to the AWS console on any user that already has a login profile setup.
Detects activity when a member is removed from a security-enabled global group
Detects scenarios where one can control another users or computers account without having to use their credentials.
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