fix search and conditions in sigma version of w3wp_spawning_shell.yml #2992
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Details
/detections/endpoint/w3wp_spawning_shell.yml didn't translate correctly to Sigma. The condition logic was making so it would detect logs that only matched selection4 and selection5. It also wasn't looking for powershell.exe event though the descriptions it should be.
I've updated the search and logic to align with the description.
Checklist
<platform>_<mitre att&ck technique>_<short description>nomenclature