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Netsh Allow Group Policy on Microsoft Defender Firewall

Adversaries may modify system firewalls in order to bypass controls limiting network usage

MITRE ATT&CK

defense-evasion

Detection Query

selection_img:
  - Image|endswith: \netsh.exe
  - OriginalFileName: netsh.exe
selection_cli:
  CommandLine|contains|all:
    - advfirewall
    - firewall
    - set
    - rule
    - group=
    - new
    - enable=Yes
condition: all of selection_*

Author

frack113

Created

2022-01-09

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1562.004

Raw Content

title: Netsh Allow Group Policy on Microsoft Defender Firewall
id: 347906f3-e207-4d18-ae5b-a9403d6bcdef
status: test
description: Adversaries may modify system firewalls in order to bypass controls limiting network usage
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1562.004/T1562.004.md#atomic-test-3---allow-smb-and-rdp-on-microsoft-defender-firewall
    - https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/netsh-advfirewall-firewall-control-firewall-behavior
author: frack113
date: 2022-01-09
modified: 2023-02-14
tags:
    - attack.defense-evasion
    - attack.t1562.004
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\netsh.exe'
        - OriginalFileName: 'netsh.exe'
    selection_cli:
        CommandLine|contains|all:
            - 'advfirewall'
            - 'firewall'
            - 'set'
            - 'rule'
            - 'group='
            - 'new'
            - 'enable=Yes'
    condition: all of selection_*
falsepositives:
    - Legitimate administration activity
level: medium