Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects modifications to Group Policy Objects (GPO) or Microsoft Entra (formerly Azure AD) policies that weaken established security controls. For GPO, it monitors Event ID 5136 for changes to security-relevant attributes (e.g., disabling firewall or real-time monitoring) in Active Directory. For Entra, it monitors audit logs for administrative operations that reduce security posture, such as disabling MFA, lowering authentication trust, or deleting Conditional Access policies. It includes filters to exclude legitimate, documented change management activities.
Detects a suspicious sequence of events where the Parallels Desktop dispatcher service (prl_disp_service) executes a tar command with a compression program flag, followed immediately by the creation or modification of a launch agent (.plist) file in system or user launch directories. This pattern is indicative of exploitation or post-exploitation activity attempting to achieve persistence.
This rule detects unauthorized modifications to the /etc/sudoers.d/ directory, specifically identifying files with a 'prl-rce-' naming pattern that contain 'NOPASSWD:ALL'. This configuration allows users to execute commands with elevated privileges (root) without requiring a password, which is a common technique used by attackers to maintain persistence and facilitate privilege escalation on Linux systems.
This rule detects unauthorized modifications to the /etc/sudoers.d/ directory, specifically identifying files with a 'prl-rce-' naming pattern that contain 'NOPASSWD:ALL'. This configuration allows users to execute commands with elevated privileges (root) without requiring a password, which is a common technique used by attackers to maintain persistence and facilitate privilege escalation on Linux systems.
This rule detects unauthorized modifications to the /etc/sudoers.d/ directory, specifically identifying files with a 'prl-rce-' naming pattern that contain 'NOPASSWD:ALL'. This configuration allows users to execute commands with elevated privileges (root) without requiring a password, which is a common technique used by attackers to maintain persistence and facilitate privilege escalation on Linux systems.
This rule detects potential web shell creation on a Microsoft Exchange server by monitoring for suspicious child processes spawned by the IIS web server process (w3wp.exe) that correlate with the creation or modification of web-accessible script files (.aspx, .ashx, .asp, .dll) within the Exchange virtual directories (ecp, owa, aspnet_client). This pattern is consistent with common post-exploitation activities used by attackers to gain persistent access via web shells.
This rule detects potential web shell creation on a Microsoft Exchange server by monitoring for suspicious child processes spawned by the IIS web server process (w3wp.exe) that correlate with the creation or modification of web-accessible script files (.aspx, .ashx, .asp, .dll) within the Exchange virtual directories (ecp, owa, aspnet_client). This pattern is consistent with common post-exploitation activities used by attackers to gain persistent access via web shells.
Detects network communication with identified C2 infrastructure associated with VectraRAT, Amadey, and ClickFix campaigns, as well as the presence of a specific 'callback.json' artifact in temporary directories, which is commonly used for C2 address overrides.
Detects suspected exploitation of CVE-2026-81963, an Elevation of Privilege vulnerability in the Windows Update stack. The rule monitors for the creation of reparse points, junctions, or symbolic links within update staging paths by Windows Update processes, followed by either the spawning of suspicious child processes or unauthorized file writes/renames outside of expected directories, which are indicative of a privileged link-following exploit.
This rule detects potential web shell activity by identifying instances where a web server process creates or modifies a PHP file within a 'wp-content/themes' directory, followed closely (within 15 minutes) by that same web server process spawning a shell process (e.g., sh, bash, cmd.exe).
This rule detects potential web shell activity by identifying instances where a web server process creates or modifies a PHP file within a 'wp-content/themes' directory, followed closely (within 15 minutes) by that same web server process spawning a shell process (e.g., sh, bash, cmd.exe).
This rule detects potential web shell activity by identifying instances where a web server process creates or modifies a PHP file within a 'wp-content/themes' directory, followed closely (within 15 minutes) by that same web server process spawning a shell process (e.g., sh, bash, cmd.exe).
Detects modifications to the /etc/sudoers or /etc/sudoers.d configuration files by non-root users. This activity is often associated with privilege escalation attempts where an adversary attempts to modify sudo policies to grant themselves elevated permissions or bypass password requirements.
Detects modifications to the /etc/sudoers or /etc/sudoers.d configuration files by non-root users. This activity is often associated with privilege escalation attempts where an adversary attempts to modify sudo policies to grant themselves elevated permissions or bypass password requirements.
Detects modifications to the /etc/sudoers or /etc/sudoers.d configuration files by non-root users. This activity is often associated with privilege escalation attempts where an adversary attempts to modify sudo policies to grant themselves elevated permissions or bypass password requirements.
Detects unauthorized modifications, creations, or renames of Pluggable Authentication Module (PAM) configuration files or core shared libraries (such as pam_rootok.so or pam_permit.so) by non-root users. Attackers often modify these files to bypass authentication mechanisms and achieve privilege escalation. The rule excludes common package management tools to minimize false positives.
Detects unauthorized modifications, creations, or renames of Pluggable Authentication Module (PAM) configuration files or core shared libraries (such as pam_rootok.so or pam_permit.so) by non-root users. Attackers often modify these files to bypass authentication mechanisms and achieve privilege escalation. The rule excludes common package management tools to minimize false positives.
This rule detects file creation or modification events within the WordPress plugin directory for 'admin-menu-editor-pro'. Given that WordPress plugins are frequent targets for web shell placement, this rule monitors for unauthorized changes to the plugin's file structure, which may indicate an attempt to gain persistence or remote code execution on the web server.
Detects file-related operations (creation, modification, renaming, or deletion) performed on files containing 'acronis' or 'backup' in their path, executed by a process associated with Acronis, running under highly privileged system contexts (root or SYSTEM). This activity is indicative of potential unauthorized manipulation or disabling of backup software, commonly seen in ransomware attacks to inhibit recovery.
Detects PHP web shells dropped into wp-content/uploads or plugin directories following WordPress plugin exploitation, characterized by host detail reporting and a browser-based file upload form
Detects unauthorized modification of file permissions on Acronis-related files or directories, or modification of Acronis-related files by non-authorized users. This rule targets attempts to weaken file security (e.g., setting permissions to 777 or 666) or unauthorized tampering with Acronis components, which may be part of an attempt to gain persistence, escalate privileges, or evade detection.
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