Code Integrity: Attempted to load a binary that did not meet code integrity policy requirements
Windows Defender Application Control (`WDAC` / Code Integrity) blocked or audited an unsigned/unapproved driver or DLL.
Event ID 307 (`Microsoft-Windows-CodeIntegrity/Operational`) triggers when Windows Kernel Code Integrity or WDAC blocks (`Enforce`) or logs (`Audit`) an attempt to load an executable, DLL, or kernel driver that fails code integrity verification (`File Name`, `Hash`, `Signer`). Primary telemetry for catching Bring Your Own Vulnerable Driver (`BYOVD`) attacks and rootkit loading.
Failure Reason / Root Cause:
Driver/DLL failed digital signature or WDAC policy check (`FileName` & `SHA256 Hash`).
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>307</EventID>
<Version>0</Version>
<Level>0</Level>
<Task>12544</Task>
<Opcode>0</Opcode>
<Keywords>0x8020000000000000</Keywords>
<TimeCreated SystemTime="2026-07-17T09:54:44.846Z" />
<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 Code Integrity: Attempted to load a binary that did not meet code integrity policy requirements -->
</EventData>
</Event>MITRE ATT&CK mapping
| ID | Technique | Tactic |
|---|---|---|
T1068 | Exploitation for Privilege Escalation: BYOVD | Privilege Escalation |
T1553.002 | Subvert Trust Controls: Code Signing | Defense Evasion |
Recommended actions
- Inspect `FileName` and `SHA256 Hash`. If a kernel driver (`.sys`) is blocked or audited during runtime, verify if adversaries are attempting to drop known vulnerable drivers (`BYOVD - T1068`) to disable EDR/AV.