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Detects exploitation attempts against CVE-2026-55040 on Microsoft SharePoint Server. This vulnerability allows an attacker to bypass authentication by sending a malformed JSON Web Token (JWT) with an 'alg: none' header or an empty signature. The SharePoint server incorrectly trusts the provided token, enabling unauthorized access to sensitive API and SOAP endpoints.
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.
