Office Products Spawning WMI (RedCanary Threat Detection Report)

SIGMA detection rule by RedCanary, Sigma formatting by Micah Babinski · GPL-3.0

Detects MS Office applications spawning WMI processes. Part of the RedCanary 2023 Threat Detection Report.

title: Office Products Spawning WMI (RedCanary Threat Detection Report)
id: 6335a2c2-5339-443a-b00c-ebffc9ffc321
status: experimental
description: Detects MS Office applications spawning WMI processes. Part of the RedCanary 2023 Threat Detection Report.
references:
    - https://redcanary.com/threat-detection-report/techniques/windows-management-instrumentation/
author: RedCanary, Sigma formatting by Micah Babinski
date: 2023/05/10
tags:
    - attack.execution
    - attack.t1047
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith:
            - '\winword.exe'
            - '\excel.exe'
        Image|endswith:
            - '\wmic.exe'
            - '\wmiprvse.exe'
    condition: selection
falsepositives:
    - Unknown
level: low

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

9ba6634e-9ab9-4ba1-b511-6c753ef095c5

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

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Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

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What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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