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
Risk score: 47
Runs every: 5 minutes
Maximum alerts per execution: 100
- Threat Detection
- Defense Evasion
Added (Elastic Stack release): 8.0.0
Rule authors: Austin Songer
Rule license: Elastic License v2
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.
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*"))