AN0581
Analytic 0581
Windows
Execution of XSL scripts via msxsl.exe or wmic.exe using embedded JScript or VBScript for proxy execution. Detection correlates process creation, command-line patterns, and module load behavior of scripting components (e.g., jscript.dll).
WinEventLog:Sysmon
EventCode=1
WinEventLog:Sysmon
EventCode=7
[CommandLinePattern]
May need to tune based on encoded input or custom extensions (e.g., .jpeg instead of .xsl).
[ParentProcess]
Legitimate administrative or developer tools may use msxsl; validate the parent process chain.
[TimeWindow]
Temporal correlation window between script engine DLL load and suspicious process spawn.
[RemoteXSLDomainWhitelist]
Filter known safe URLs used by enterprise for XSL transformations.