Malicious XSL Script Delivered for WMIC Proxy Execution

Darshan Thummar@Mighty

•updated Jun 12, 2026•0•0•7

This rule detects the delivery of a malicious XSL (Extensible Stylesheet Language) script via HTTP to a client. The detection is based on the HTTP URI containing ".xsl" (case-insensitive) and the file data containing "<msxsl:script" (case-insensitive). This pattern is indicative of an attempt to use XSLT for proxy execution, often associated with techniques like WMIC (Windows Management Instrumentation Command-line) for defense evasion.