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Elastic Docs ›Elastic Security Solution [8.2] ›Detections and alerts ›Prebuilt rule reference

Suspicious WMIC XSL Script Execution

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Suspicious WMIC XSL Script Execution

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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.

Rule type: eql

Rule indices:

  • winlogbeat-*
  • logs-endpoint.events.*
  • logs-windows.*

Severity: medium

Risk score: 21

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

Tags:

  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Defense Evasion

Version: 3 (version history)

Added (Elastic Stack release): 7.10.0

Last modified (Elastic Stack release): 8.1.0

Rule authors: Elastic

Rule license: Elastic License v2

Rule query

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sequence by process.entity_id with maxspan = 2m [process where
event.type in ("start", "process_started") 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 *"] [library where event.type
== "start" and dll.name : ("jscript.dll", "vbscript.dll")]

Threat mapping

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Framework: MITRE ATT&CKTM

Rule version history

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Version 3 (8.1.0 release)
  • Formatting only
Version 2 (7.12.0 release)

  • Updated query, changed from:

    sequence by process.entity_id with maxspan=2m [process where
event.type in ("start", "process_started") and (process.name :
"WMIC.exe" or process.pe.original_file_name == "wmic.exe") and
wildcard(process.args, "format*:*", "/format*:*", "*-format*:*") and
not wildcard(process.command_line, "* /format:table *")] [library
where event.type == "start" and file.name in ("jscript.dll",
"vbscript.dll")]
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