Query: Sigma YAML for windows / applocker
Matching passage: Sigma rule: Detects when AppLocker "Audit only" enforcement mode reports that an Application, DLL, Script, MSI, or Packaged-App woul. Logsource: windows / applocker. Rule: title: AppLocker Application Would Have Been Blocked id: 557e3bd3-7f21-495d-8d50-7c8bdfb8041c status: experimental description: 'Detects when AppLocker "Audit only" enforcement mode reports that an Application, DLL, Script, MSI, or Packaged-App would have been blocked if AppLocker "Enforce rules" enforcement mode was enabled. ' references: - https://learn.microsoft.com/en-us/windows/security/application-security/application-control/windows-defender-application-control/applocker/what-is-applocker - https://learn.microsoft.com/en-us/windows/security/application-security/application-control/windows-defender-application-control/applocker/using-event-viewer-with-applocker - https://www.splunk.com/en_us/blog/security/deploy-test-monitor-mastering-microsoft-applocker-part-2.html - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/ee844150(v=ws.11) author: heyyanu date: 2026-03-26 tags: - attack.execution - attack.t1204.002 - attack.t1059.001 - attack.t1059.003 - attack.t1059.005 - attack.t1059.006 - attack.t1059.007 logsource: product: windows service: applocker detection: selection: EventID: - 8003 - 8006 - 8021 - 8024 condition: selection falsepositives: - Expected during AppLocker policy testing and audit mode deployments level: medium
Near-miss passage: Sigma rule: Identifies when a virtual network device is being modified or deleted. This can be a network interface, network virtual. Logsource: azure / activitylogs. Rule: title: Azure Virtual Network Device Modified or Deleted id: 15ef3fac-f0f0-4dc4-ada0-660aa72980b3 status: test description: 'Identifies when a virtual network device is being modified or deleted. This can be a network interface, network virtual appliance, virtual hub, or virtual router. ' references: - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations author: Austin Songer @austinsonger date: 2021-08-08 modified: 2022-08-23 tags: - attack.impact logsource: product: azure service: activitylogs detection: selection: operationName: - MICROSOFT.NETWORK/NETWORKINTERFACES/TAPCONFIGURATIONS/WRITE - MICROSOFT.NETWORK/NETWORKINTERFACES/TAPCONFIGURATIONS/DELETE - MICROSOFT.NETWORK/NETWORKINTERFACES/WRITE - MICROSOFT.NETWORK/NETWORKINTERFACES/JOIN/ACTION - MICROSOFT.NETWORK/NETWORKINTERFACES/DELETE - MICROSOFT.NETWORK/NETWORKVIRTUALAPPLIANCES/DELETE - MICROSOFT.NETWORK/NETWORKVIRTUALAPPLIANCES/WRITE - MICROSOFT.NETWORK/VIRTUALHUBS/DELETE - MICROSOFT.NETWORK/VIRTUALHUBS/WRITE - MICROSOFT.NETWORK/VIRTUALROUTERS/WRITE - MICROSOFT.NETWORK/VIRTUALROUTERS/DELETE condition: selection falsepositives: - Virtual Network Device being modified or deleted may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. - Virtual Network Device modified or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule. level: medium