Code Integrity: Attempted to load a binary that did not meet code integrity policy requirements

// EVENT DEFINITION:

Windows Defender Application Control (`WDAC` / Code Integrity) blocked or audited an unsigned/unapproved driver or DLL.

// DETAILED TELEMETRY & CONTEXT:

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 Analysis

Driver/DLL failed digital signature or WDAC policy check (`FileName` & `SHA256 Hash`).

Operational Metadata & Applicability

Log Category:Code Integrity

Audit Type Classification:Failure Audit

Supported Operating Systems:Windows Server 2016, 2019, 2022 / Windows Client 10, 11 (Enterprise / Pro)

Threat Hunting Keywords:

307code integrity check failedwdac blockedunsigned driver blockedbyovdkernel rootkit blocked

MITRE ATT&CK Framework Alignment

T1068

Exploitation for Privilege Escalation: BYOVDTactic: Privilege Escalation

T1553.002

Subvert Trust Controls: Code SigningTactic: Defense Evasion

Mitigation Playbook & Recommended SOC 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.

Representative Windows Event XML Schema

<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="2026-07-17T09:54:44.219Z" />
    <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>

Correlated / Related Security Event IDs

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