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Elastic Docs ›Elastic Security Solution [8.0] ›Detections and alerts ›Prebuilt rule reference

Windows Firewall Disabled via PowerShell

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Windows Firewall Disabled via PowerShell

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Identifies when the Windows Firewall is disabled using PowerShell cmdlets, which attackers do to evade network constraints, like internet and network lateral communication restrictions.

Rule type: eql

Rule indices:

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

Severity: medium

Risk score: 47

Runs every: 5 minutes

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

Maximum alerts per execution: 100

References:

Tags:

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

Version: 1

Added (Elastic Stack release): 8.0.0

Rule authors: Austin Songer

Rule license: Elastic License v2

Potential false positives

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Windows Firewall can be disabled may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. Windows Profile being disabled from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

Rule query

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process where event.action == "start" and (process.name :
("powershell.exe", "pwsh.exe", "powershell_ise.exe") or
process.pe.original_file_name == "PowerShell.EXE") and process.args
: "*Set-NetFirewallProfile*" and (process.args : "*-Enabled*" and
process.args : "*False*") and (process.args : "*-All*" or
process.args : ("*Public*", "*Domain*", "*Private*"))

Threat mapping

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Framework: MITRE ATT&CKTM

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