Sigma rule: New Firewall Rule Added In Windows Firewall Exception List For Potential Suspicious Application

Rule

Title

New Firewall Rule Added In Windows Firewall Exception List For Potential Suspicious Application

Status

test

Level

high

Author

frack113

Date

2023-02-26

Modified

2024-05-10

File

rules/windows/builtin/firewall_as/win_firewall_as_add_rule_susp_folder.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the addition of a new rule to the Windows Firewall exception list for an application located in a potentially suspicious location.

Log source

product

windows

service

firewall-as

Detection

selection:
    EventID:
        - 2004 # A rule has been added to the Windows Defender Firewall exception list. (Windows 10)
        - 2071 # A rule has been added to the Windows Defender Firewall exception list. (Windows 11)
        - 2097
    ApplicationPath|contains:
        - ':\PerfLogs\'
        - ':\Temp\'
        - ':\Tmp\'
        - ':\Users\Public\'
        - ':\Windows\Tasks\'
        - ':\Windows\Temp\'
        - '\AppData\Local\Temp\'
filter_main_block:
    Action: 2 # Block
condition: selection and not 1 of filter_main_*

False positives (as the rule lists them)

• Unknown

Tags

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

MITRE ATT&CK ids this rule names

• T1686.003

Related rules

• cde0a575-7d3d-4a49-9817-b8004a7bf105 (derived)

References

• https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-r2-and-2008/dd364427(v=ws.10)
• https://app.any.run/tasks/7123e948-c91e-49e0-a813-00e8d72ab393/#

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_add_rule_susp_folder.yml