Sigma rule: A Rule Has Been Deleted From The Windows Firewall Exception List

Rule

Title

A Rule Has Been Deleted From The Windows Firewall Exception List

Status

test

Level

medium

Author

frack113

Date

2022-02-19

Modified

2026-10-19

File

rules/windows/builtin/firewall_as/win_firewall_as_delete_rule.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects when a single rules or all of the rules have been deleted from the Windows Defender Firewall

Log source

product

windows

service

firewall-as

Detection

selection:
    EventID:
        - 2006 # A rule has been deleted in the Windows Defender Firewall exception list
        - 2052 # A rule has been deleted in the Windows Defender Firewall exception list. (Windows 11)
filter_main_generic:
    ModifyingApplication|startswith:
        - 'C:\Program Files (x86)\'
        - 'C:\Program Files\'
        - 'C:\Windows\WinSxS\'
filter_main_local_system:
    # Added to filter out modifications made by the Local System account as these are typically legitimate system actions and cause false positives.
    ModifyingUser: 'S-1-5-18'
filter_main_msiexec:
    ModifyingApplication:
        - 'C:\Windows\SysWOW64\msiexec.exe'
        - 'C:\Windows\System32\msiexec.exe'
filter_main_svchost:
    ModifyingApplication: 'C:\Windows\System32\svchost.exe'
filter_main_msmpeng:
    ModifyingApplication|startswith: 'C:\ProgramData\Microsoft\Windows Defender\Platform\'
    ModifyingApplication|endswith: '\MsMpEng.exe'
filter_main_null:
    ModifyingApplication: null
filter_main_empty:
    ModifyingApplication: ''
filter_optional_google_updater:
    ModifyingApplication|startswith: 'C:\Windows\SystemTemp\'
    ModifyingApplication|contains: 'GoogleUpdater'
    ModifyingApplication|endswith: '\setup.exe'
condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*

Tags

• attack.defense-impairment
• attack.t1686.003

MITRE ATT&CK ids this rule names

• T1686.003

References

• https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-r2-and-2008/dd364427(v=ws.10)

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/firewall_as/win_firewall_as_delete_rule.yml