Command Shell Bypassing Security Controls (RedCanary Threat Detection Report)

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

Detects command line strings which indicate potential attempts to bypass controls. Part of the RedCanary 2023 Threat Detection Report.

title: Command Shell Bypassing Security Controls (RedCanary Threat Detection Report)
id: e76af6c9-1c66-4ed7-9a36-b2f905e2e78c
status: experimental
description: Detects command line strings which indicate potential attempts to bypass controls. Part of the RedCanary 2023 Threat Detection Report.
references:
    - https://redcanary.com/threat-detection-report/techniques/windows-command-shell/
author: RedCanary, Sigma formatting by Micah Babinski
date: 2023/05/10
tags:
    - attack.execution
    - attack.t1059.003
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\cmd.exe'
        CommandLine|contains:
            - 'bypass'
            - '-exec'
    condition: selection
falsepositives:
    - Unknown
level: low

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

f9911362-79c1-4a80-8433-0aec1b198444

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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

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