Detections

Explore public detection logic contributed by the community across SIEM and rule languages.

141 detections

This rule detects network connections to port 389 (LDAP) that contain specific keywords related to Active Directory trust relationships. This could indicate an adversary attempting to discover trust details within an Active Directory environment.
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nomit vyas@xoxo
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Detections.ai Community
4 months ago
005
This rule monitors for unauthorized deletion or modification of Microsoft Sentinel alert rules and automation rules. Such actions are indicative of an attacker attempting to impair security monitoring, silence alerts, or disable automated responses to maintain persistence and evade detection.
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Ankit Mehta@Secvyn
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Detections.ai Community
4 months ago
001
This rule detects unauthorized modifications to sensitive Group Policy Object (GPO) attributes, such as file system paths, version numbers, or extension settings. It monitors Security Event 5136 for changes targeting GPO containers by non-standard administrative accounts, flagging potential attempts to persist access or escalate privileges via GPO tampering.
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Ankit Mehta@Secvyn
Bharat Cyber Guardians
4 months ago
101
This rule detects unauthorized modifications to sensitive Group Policy Object (GPO) attributes, such as file system paths, version numbers, or extension settings. It monitors Security Event 5136 for changes targeting GPO containers by non-standard administrative accounts, flagging potential attempts to persist access or escalate privileges via GPO tampering.
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Ankit Mehta@Secvyn
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Detections.ai Community
4 months ago
001
Detects any modification (add, update, or delete) to Entra ID cross-tenant access settings. Adversaries may manipulate these trust configurations to weaken inbound security restrictions, establish unauthorized access between tenants, or facilitate cross-tenant impersonation.
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Ankit Mehta@Secvyn
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Detections.ai Community
4 months ago
001
Detects the execution of SharpGPOAbuse or usage of its associated command-line arguments. This tool is frequently used by attackers to modify Group Policy Objects (GPOs) in an Active Directory environment to achieve privilege escalation or persistent access.
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Ibrahim Saud@tektrix
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Detections.ai Community
4 months ago
001
Detects a RedVDS login followed by commands modifying domain trusts or attempting Active Directory Certificate Services (AD CS) abuse within a 2-hour window. The rule specifically looks for 'Certify.exe' or 'nltest /domain_trusts' commands after a login from a predefined RedVDS IP range.
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Ibrahim Saud@tektrix
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Detections.ai Community
4 months ago
107
This rule detects modifications to Group Policy Objects (GPOs) that involve sensitive attributes such as logon scripts, startup/shutdown scripts, or file system paths, particularly when performed by service accounts or non-administrator users. This activity is a common indicator of persistence mechanisms or lateral movement via GPO abuse.
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Ankit Mehta@Secvyn
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Detections.ai Community
4 months ago
000
This rule detects potential abuse of Group Policy Objects (GPOs) by identifying multiple changes (3 or more) to GPO-related objects within a short timeframe. It specifically looks for Event ID 5136 (Directory Service Changes) where the ObjectClass is either 'groupPolicyContainer' or 'gPCFileSysPath'. This could indicate an adversary modifying GPOs to achieve persistence, privilege escalation, or other malicious objectives.
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Ankit Mehta@Secvyn
Bharat Cyber Guardians
4 months ago
000
Detects potentially unauthorized or malicious Group Policy Object (GPO) modifications and deployment activities. This includes the creation or modification of GPO files on domain controllers (SYSVOL/NETLOGON shares), the use of specific PowerShell scripts associated with GPO deployment, execution of forced group policy updates, and attempts to disable real-time security monitoring via GPO context.
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Ibrahim Saud@tektrix
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Detections.ai Community
4 months ago
000
Detects modifications or deletions of Conditional Access policies in an environment. This includes disabling policies or altering key configurations like users, groups, applications, platforms, or locations, which could be indicative of an attacker attempting to bypass security controls or maintain persistent access.
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Ankit Mehta@Secvyn
Bharat Cyber Guardians
4 months ago
001
Detects modifications or deletions of Conditional Access policies in an environment. This includes disabling policies or altering key configurations like users, groups, applications, platforms, or locations, which could be indicative of an attacker attempting to bypass security controls or maintain persistent access.
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Ankit Mehta@Secvyn
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Detections.ai Community
4 months ago
001
This rule correlates commands indicative of privilege escalation (checking local administrator groups or user privileges) with subsequent manipulation of Quality of Service (QoS) policies via WMI. This sequence of events suggests an attacker gaining elevated privileges and then attempting to throttle network traffic, potentially to hinder EDR/security tool communication or data exfiltration.
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Ibrahim Saud@tektrix
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Detections.ai Community
4 months ago
009
Detects modifications or deletions of Conditional Access policies in an environment. This includes disabling policies or altering key configurations like users, groups, applications, platforms, or locations, which could be indicative of an attacker attempting to bypass security controls or maintain persistent access.
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Ankit Mehta@Secvyn
Bharat Cyber Guardians
4 months ago
000
Detects modification of Group Policy Objects for privilege escalation
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Darshan Thummar@Mighty
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Detections.ai Community
5 months ago
006
Detects modification of Group Policy Objects for privilege escalation
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Darshan Thummar@Mighty
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Detections.ai Community
5 months ago
002
This rule detects changes to the domain password policy by monitoring Windows Security Event ID 4739. It summarizes these events by the user who made the change and the time, providing an hourly count of policy modifications. This can help identify unauthorized or suspicious alterations to critical security policies.
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Ankit Mehta@Secvyn
Bharat Cyber Guardians
5 months ago
204
This rule detects changes to the domain password policy by monitoring Windows Security Event ID 4739. It summarizes these events by the user who made the change and the time, providing an hourly count of policy modifications. This can help identify unauthorized or suspicious alterations to critical security policies.
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Ankit Mehta@Secvyn
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Detections.ai Community
5 months ago
004
This rule detects potential abuse of Group Policy Objects (GPOs) by identifying multiple changes (3 or more) to GPO-related objects within a short timeframe. It specifically looks for Event ID 5136 (Directory Service Changes) where the ObjectClass is either 'groupPolicyContainer' or 'gPCFileSysPath'. This could indicate an adversary modifying GPOs to achieve persistence, privilege escalation, or other malicious objectives.
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Ankit Mehta@Secvyn
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Detections.ai Community
5 months ago
003
This rule detects potential abuse of Group Policy Objects (GPOs) by identifying multiple changes (3 or more) to GPO-related objects within a short timeframe. It specifically looks for Event ID 5136 (Directory Service Changes) where the ObjectClass is either 'groupPolicyContainer' or 'gPCFileSysPath'. This could indicate an adversary modifying GPOs to achieve persistence, privilege escalation, or other malicious objectives.
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Ankit Mehta@Secvyn
Bharat Cyber Guardians
5 months ago
002
This rule detects attempts to modify Group Policy Objects (GPOs) over Server Message Block (SMB) by looking for HTTP PUT requests containing '\SYSVOL\' and '\Policies\' in the URI. This activity can indicate an adversary attempting to escalate privileges or establish persistence within an Active Directory domain.
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Darshan Thummar@Mighty
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Detections.ai Community
5 months ago
003
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