Detectionmediumtest

Windows Firewall Disabled via PowerShell

Detects attempts to disable the Windows Firewall using PowerShell

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Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Launch

Tim Rauch, Elastic SecurityCreated Wed Sep 14Updated Mon Feb 1312f6b752-042d-483e-bf9c-915a6d06ad75windows

Log Source

WindowsProcess Creation

ProductWindows← raw: windows

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

detection:
    selection_name:
        - Image|endswith:
              - '\powershell.exe'
              - '\pwsh.exe'
              - '\powershell_ise.exe'
        - OriginalFileName:
              - 'PowerShell.EXE'
              - 'pwsh.dll'
    selection_args:
        CommandLine|contains|all:
            - 'Set-NetFirewallProfile '
            - ' -Enabled '
            - ' False'
    selection_opt:
        CommandLine|contains:
            - ' -All '
            - 'Public'
            - 'Domain'
            - 'Private'
    condition: all of selection_*