Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects attempts to exploit a SharePoint vulnerability that involves bypassing SafeControls via quote-injection within the Register directive. The rule monitors POST requests to .aspx files for specific malicious patterns, including the use of 'ignoreParentFrozen' and malformed 'Register' tags that facilitate unauthorized code execution.
Detects the loading of WPF/XAML-related assemblies (PresentationFramework.dll, System.Xaml.dll, or PresentationCore.dll) by the SharePoint web server process (w3wp.exe). This behavior is highly irregular for typical SharePoint web worker processes and may indicate an exploitation attempt targeting deserialization vulnerabilities leading to remote code execution.
Detects unauthorized POST requests to SharePoint WebPart gallery pages that lack valid authentication cookies, which may indicate exploitation of CVE-2026-65660. The rule monitors for POST methods to specific SharePoint pages while excluding requests that already contain standard SharePoint authentication cookies (FedAuth, rtFa).
Detects anomalous SOAP requests to the SharePoint WebPartPages.asmx endpoint specifically targeting the 'GetWebPartPageConnectionInfo' method. This pattern is associated with exploitation attempts against SharePoint vulnerabilities.
Detects anomalous access to the SharePoint WebPartPages.asmx SOAP endpoint, specifically using the GetWebPartPageConnectionInfo method. This query identifies patterns consistent with the exploitation of CVE-2026-65660, where adversaries attempt to smuggle WebPart template markup (e.g., <%@ Register, XamlServices) after legitimate preview methods have been disabled.
This rule detects potentially malicious POST requests to SharePoint endpoints (such as AddGallery.aspx) that include indicators of WebPartMarkup or ToolPane payloads. This activity attempts to bypass the SPUtility.EnsureAuthentication() check that is typically enforced on the ToolPane.aspx page, potentially allowing unauthorized code execution or configuration manipulation.
This rule detects potentially malicious POST requests to SharePoint endpoints (such as AddGallery.aspx) that include indicators of WebPartMarkup or ToolPane payloads. This activity attempts to bypass the SPUtility.EnsureAuthentication() check that is typically enforced on the ToolPane.aspx page, potentially allowing unauthorized code execution or configuration manipulation.
Detects anomalous access to the SharePoint WebPartPages.asmx SOAP endpoint, specifically using the GetWebPartPageConnectionInfo method. This query identifies patterns consistent with the exploitation of CVE-2026-65660, where adversaries attempt to smuggle WebPart template markup (e.g., <%@ Register, XamlServices) after legitimate preview methods have been disabled.
This rule detects unauthorized process creation from the SharePoint worker process (w3wp.exe). It specifically monitors for the spawning of command-line shells or scripting engines, which is indicative of exploitation activity such as remote code execution (RCE) attempts against SharePoint services, including deserialization attacks.
This rule detects unauthorized process creation from the SharePoint worker process (w3wp.exe). It specifically monitors for the spawning of command-line shells or scripting engines, which is indicative of exploitation activity such as remote code execution (RCE) attempts against SharePoint services, including deserialization attacks.
Detects an exploitation attempt targeting SharePoint through the EditingPageParser by injecting a Register directive. This attempt involves bypassing SafeControls through specifically crafted HTTP POST requests to ToolPane.aspx, utilizing the GetPartPreviewAndPropertiesFromMarkup function to execute malicious tag patterns.
Detects the SharePoint application pool worker process (w3wp.exe) spawning command-line interpreters or scripting engines. This behavior is indicative of post-exploitation activity where an attacker, having gained remote code execution via techniques like insecure deserialization, executes commands or deploys in-memory webshells within the context of the IIS worker process.
Detects unauthorized attempts to access SharePoint's WebPartPage ToolPane and Gallery endpoints via anonymous web requests. This pattern, characterized by the 'DisplayMode=Design' query parameter and suspicious markup in the request body, is indicative of exploitation attempts targeting vulnerable SharePoint installations to execute arbitrary code or bypass authentication mechanisms.
Detects an attempt to exploit a quote-injection vulnerability within the SharePoint ToolPane.aspx page, specifically targeting the Register directive to bypass SafeControls restrictions. This pattern is commonly used for remote code execution or unauthorized application behavior modifications by manipulating server-side parsing.
Detects anomalous child process execution from SharePoint's w3wp.exe worker process following the loading of suspicious .NET assemblies (PresentationFramework.dll, System.Xaml.dll, System.Data.Services.dll). This behavior is indicative of a post-exploitation stage for SharePoint SafeControls bypass vulnerabilities, where a gadget chain is utilized to execute unmanaged or child processes.
Detects malicious HTTP POST requests targeting SharePoint servers that attempt to inject 'Register' directives into pages or manipulate WebPartPage ToolPane markup, indicative of attempts to bypass SafeControls or exploit vulnerable SharePoint features for code execution.
This rule detects malicious deserialization attempts targeting Microsoft SharePoint, specifically leveraging System.Data.Services.Internal.ExpandedWrapper combined with LosFormatter and System.Xaml.XamlServices. This signature is indicative of exploitation attempts related to CVE-2026-65660, allowing an attacker to achieve remote code execution by bypassing SafeControls restrictions.
Detects an exploitation attempt against the SharePoint WebPartPagesWebService using the GetWebPartPageConnectionInfo method. The rule monitors for suspicious input patterns such as 'Register' and 'ignoreParentFrozen' within the URI query, which are indicative of a directive injection vulnerability.
Detects an attempt to bypass SharePoint authentication using a 'Register' directive in a POST request body directed at an .aspx page that is not a recognized ToolPane page. This pattern is indicative of an exploit attempt against a public-facing SharePoint server, specifically targeting vulnerability CVE-2026-65660.
Detects the presence of specific .NET deserialization gadget chain components (ExpandedWrapper, XamlServices, ObjectDataProvider, LosFormatter) within application traffic or logs, which are indicative of exploitation attempts targeting SharePoint pre-authentication remote code execution vulnerabilities like CVE-2026-65660.
Detects HTTP POST requests to SharePoint ToolPane or WebPartPage endpoints containing serialized gadget chains (e.g., ysoserial ExpandedWrapper/ObjectDataProvider or XamlServices) indicative of deserialization exploitation attempts, specifically targeting CVE-2026-65660.
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