4670

Permissions on an object were changed

SACLs or DACLs on a file, registry key, or system object were modified.

Event ID 4670 documents when security permissions (`SDDL` descriptors) are changed on an object. Attackers often alter file or registry permissions (`take ownership` or grant `Full Control` to `Everyone`) to overwrite protected system binaries (`icacls`, `takeown`).

Failure Reason / Root Cause:

IT permission adjustments, or attacker weakening DACLs on `C:\Windows\System32\` files to replace system executables.

CategoryObject Access
Audit typeSuccess Audit
SeverityHigh
Applies toWindows Server 2016, 2019, 2022 / Windows 10, 11
Keywordspermissions changed, dacl changed, sacl changed, icacls, takeown, sddl
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>4670</EventID>
    <Version>0</Version>
    <Level>0</Level>
    <Task>12544</Task>
    <Opcode>0</Opcode>
    <Keywords>0x8020000000000000</Keywords>
    <TimeCreated SystemTime="2026-07-17T09:54:44.873Z" />
    <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 Permissions on an object were changed -->
  </EventData>
</Event>

MITRE ATT&CK mapping

IDTechniqueTactic
T1222.001File and Directory Permissions ModificationDefense Evasion

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