AppLocker: Script or MSI blocked from running
A script (`VBS`, `JS`, `PS1`, `BAT`) or Windows Installer (`MSI`) was blocked by AppLocker application control.
Event ID 8007 (`Microsoft-Windows-AppLocker/MSI and Script`) logs when AppLocker prevents an unauthorized script or installer from executing (`FilePath blocked`). Critical alert for stopping macro payloads, VBS droppers, and unauthorized PowerShell scripts right at initial execution.
Failure Reason / Root Cause:
Script or MSI execution blocked by AppLocker rule (`FilePath` denied).
Raw Event XML snippet
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Security-Auditing" Guid="{54849625-5478-4994-A5BA-3E3B0328C30D}" />
<EventID>8007</EventID>
<Version>0</Version>
<Level>0</Level>
<Task>12544</Task>
<Opcode>0</Opcode>
<Keywords>0x8020000000000000</Keywords>
<TimeCreated SystemTime="2026-07-17T09:54:44.945Z" />
<EventRecordID>1048576</EventRecordID>
<Correlation />
<Execution ProcessID="612" ThreadID="1024" />
<Channel>Security</Channel>
<Computer>DC01.enterprise.internal</Computer>
<Security />
</System>
<EventData>
<Data Name="SubjectUserSid">S-1-5-18</Data>
<Data Name="SubjectUserName">SYSTEM</Data>
<Data Name="SubjectDomainName">NT AUTHORITY</Data>
<Data Name="SubjectLogonId">0x3e7</Data>
<!-- Event telemetry fields specific to AppLocker: Script or MSI blocked from running -->
</EventData>
</Event>MITRE ATT&CK mapping
| ID | Technique | Tactic |
|---|---|---|
T1059 | Command and Scripting Interpreter | Execution |
T1566.001 | Phishing: Attachment | Initial Access |
Recommended actions
- Inspect `FilePath` and target user. If blocked scripts originate from email attachments (`C:\Users\*\AppData\Local\Microsoft\Windows\INetCache`) or downloads, isolate the workstation and inspect for phishing payload delivery.