Convert indexed Sigma rules into analyst-ready detections.
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2
Newest: 2.0.1
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Active Rule
Add Authorized Applications to Microsoft Defender Firewall via Registry
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Target Profile
Splunk
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Format Mode
Default
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Add Authorized Applications to Microsoft Defender Firewall via Registry
Using Splunk · Default · pySigma 2.0.1
Translation controls
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title: Add Authorized Applications to Microsoft Defender Firewall via Registry
id: 6648f900-4a7d-47e3-bad6-952b313a1c0e
status: experimental
description: |
Detects the degradation of the system firewall security by the creation or re-enabling of per-application
exceptions via registry writes to the AuthorizedApplications\List keys under FirewallPolicy, which grants
the targeted executable network access and can be abused by malware to bypass network restrictions.
references:
- https://www.virustotal.com/gui/file/da209017000b9812e8bc5f4e8db6499430ee2aadc72ef896964cffdfd896f143/behavior
- https://app.any.run/tasks/8d4113a8-5403-4367-a79f-4ce4978d9bdb
- https://www.trendmicro.com/vinfo/us/threat-encyclopedia/malware/trojan.win32.zbot.e
- https://www.greatis.com/appdata/d/q/qykernel.exe.htm
- https://www.scanspyware.net/spyware-sub/spyware-removal/MarketScore-RelevantKnowledge
author: frack113
date: 2026-10-13
tags:
- attack.defense-impairment
- attack.t1686.003
logsource:
category: registry_set
product: windows
detection:
selection:
TargetObject|contains|all:
- '\Services\SharedAccess\Parameters\FirewallPolicy\'
- '\AuthorizedApplications\List'
Details|contains: ':Enabled:'
condition: selection
falsepositives:
- Unknown
level: medium
regression_tests_path: regression_data/rules/windows/registry/registry_set/registry_set_defender_firewall_add_exception/info.yml
CLI command
Sigma CLI 4.0.0 · Install matching versions, then run from the Phoenix project directory.
python -m pip install 'sigma-cli==4.0.0' 'pysigma==2.0.1' 'pysigma-backend-splunk==3.0.0'
sigma convert --without-pipeline -t splunk -f default 'sigma/rules/windows/registry/registry_set/registry_set_defender_firewall_add_exception.yml'