Elastic medium stable eql

Suspicious WMIC XSL Script Execution

Identifies WMIC allowlist bypass techniques by alerting on suspicious execution of scripts. When WMIC loads scripting libraries it may be indicative of an allowlist bypass.

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Detection Logic

sequence by process.entity_id with maxspan = 2m
[process where host.os.type == "windows" and event.type == "start" and
   (process.name : "WMIC.exe" or process.pe.original_file_name : "wmic.exe") and
   process.args : ("format*:*", "/format*:*", "*-format*:*") and
   not process.command_line : ("* /format:table *", "* /format:table")]
[any where host.os.type == "windows" and (event.category == "library" or (event.category == "process" and event.action : "Image loaded*")) and
 (?dll.name : ("jscript.dll", "vbscript.dll") or file.name : ("jscript.dll", "vbscript.dll"))]

Field Validations

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