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Update audit-registry.md

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Add a note about expected events on Create Subkey.
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sravanigannavarapu
2021-12-06 13:35:18 -08:00
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commit 58a9eb3c3e
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windows/security/threat-protection/auditing/audit-registry.md
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@ -46,6 +46,7 @@ If success auditing is enabled, an audit entry is generated each time any accoun
- [4670](event-4670.md)(S): Permissions on an object were changed.
> [!NOTE]
> On creating a subkey for a parent, the expectation is to see a 4656 event for the newly created subkey. You will see this event only when "Audit Object Access" is enabled under **Local Policies** > **Audit Policy** in Local Security Policy. This event is not generated while using advanced audit policy configurations for registry specific events, such as using "auditpol.exe /set /subcategory:{0CCE921E-69AE-11D9-BED3-505054503030} /success:enable". While using regedit.exe for creating subkeys you will see an additional 4663 event because you perform NtEnumerateKeys on the newly created subkey. You might additionally see a 4663 event on the newly created key if you try to rename the subkey. While using reg.exe for creating subkeys you'll see an additional 4663 event because you perform NtSetValueKey on the newly created subkey. We recommend not relying on 4663 events for subkey creation as they are dependent on the type of permissions enabled on the parent and are not consistent across regedit.exe and reg.exe.
> [!NOTE]
> On creating a subkey for a parent (RegCreateKey), the expectation is to see an event for opening a handle for the newly created object (Event 4656) issued by the object manager. We see this event only when "Audit Object Access" is enabled under **Local Policies** > **Audit Policy** in Local Security Policy. This event is not generated while using precisely defined settings for seeing only registry related events under **Advanced Audit Policy Configurations** > **Object Access** > **Audit Registry** in Local Security Policy. For example, we do not see this event with the setting to just see the registry related auditing events using "auditpol.exe /set /subcategory:{0CCE921E-69AE-11D9-BED3-505054503030} /success:enable".
Calls to Registry APIs which involve accessing the key to perform any operations like RegSetValue, RegEnumValue, RegRenameKey etc. would trigger an event to access the object (Event 4663). So for example, creating a subkey using regedit.exe would not trigger a 4663 event, but renaming it would.