A Rule Has Been Deleted From The Windows Firewall Exception List

 1title: A Rule Has Been Deleted From The Windows Firewall Exception List
 2id: c187c075-bb3e-4c62-b4fa-beae0ffc211f
 3status: test
 4description: Detects when a single rules or all of the rules have been deleted from the Windows Defender Firewall
 5references:
 6    - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-r2-and-2008/dd364427(v=ws.10)
 7author: frack113
 8date: 2022-02-19
 9modified: 2026-10-19
10tags:
11    - attack.defense-impairment
12    - attack.t1686.003
13logsource:
14    product: windows
15    service: firewall-as
16detection:
17    selection:
18        EventID:
19            - 2006 # A rule has been deleted in the Windows Defender Firewall exception list
20            - 2052 # A rule has been deleted in the Windows Defender Firewall exception list. (Windows 11)
21    filter_main_generic:
22        ModifyingApplication|startswith:
23            - 'C:\Program Files (x86)\'
24            - 'C:\Program Files\'
25            - 'C:\Windows\WinSxS\'
26    filter_main_local_system:
27        # Added to filter out modifications made by the Local System account as these are typically legitimate system actions and cause false positives.
28        ModifyingUser: 'S-1-5-18'
29    filter_main_msiexec:
30        ModifyingApplication:
31            - 'C:\Windows\SysWOW64\msiexec.exe'
32            - 'C:\Windows\System32\msiexec.exe'
33    filter_main_svchost:
34        ModifyingApplication: 'C:\Windows\System32\svchost.exe'
35    filter_main_msmpeng:
36        ModifyingApplication|startswith: 'C:\ProgramData\Microsoft\Windows Defender\Platform\'
37        ModifyingApplication|endswith: '\MsMpEng.exe'
38    filter_main_null:
39        ModifyingApplication: null
40    filter_main_empty:
41        ModifyingApplication: ''
42    filter_optional_google_updater:
43        ModifyingApplication|startswith: 'C:\Windows\SystemTemp\'
44        ModifyingApplication|contains: 'GoogleUpdater'
45        ModifyingApplication|endswith: '\setup.exe'
46    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*
47level: medium