# 5.4 lcs.audit.key.deleted

_Peios / Using Peios / Events / Registry Events_

> The record that a registry key was deleted from a layer through its own handle, or that an attempt failed.

- **Event type:** `lcs.audit.key.deleted`
- **Defined in:** `lcs.evman`
- **Tier:** essential
- **Gating:** DELETE overlaps the alarm mask cached on the key handle
- **Cardinality:** once per delete through a handle whose mask covers it

The record that a registry key was deleted from a layer through its own
handle, or that an attempt failed. The key named is the one deleted, the
handle's key, by GUID and full path.

Deleting a layer's metadata key, `Machine\System\Registry\Layers\<Name>`,
deletes the layer itself; the record then also names the layer.

## 5.4.1 Fields

| Field | Type | Presence | Meaning |
|---|---|---|---|
| [`subject.token.sid`](/peios/using-peios/events/field-index/fields-subject.md#subject.token.sid) | `bin.sid` | via [`caller`](/peios/using-peios/events/groups/group-caller.md) | The user SID of the effective token the operation ran under. |
| [`subject.token.integrity`](/peios/using-peios/events/field-index/fields-subject.md#subject.token.integrity) | `uint.integrity` | via [`caller`](/peios/using-peios/events/groups/group-caller.md) | The integrity RID of the effective token. |
| [`subject.token.id`](/peios/using-peios/events/field-index/fields-subject.md#subject.token.id) | `uint.luid` | via [`caller`](/peios/using-peios/events/groups/group-caller.md) | The token's own LUID, identifying this specific token rather than the logon session it belongs to. |
| [`subject.token.auth-id`](/peios/using-peios/events/field-index/fields-subject.md#subject.token.auth-id) | `uint.luid` | via [`caller`](/peios/using-peios/events/groups/group-caller.md) | The LUID of the logon session the effective token belongs to. |
| [`subject.token.type`](/peios/using-peios/events/field-index/fields-subject.md#subject.token.type) | `str.enum` | via [`caller`](/peios/using-peios/events/groups/group-caller.md) | Whether the effective token is a primary token or an impersonation token. |
| [`subject.token.impersonation`](/peios/using-peios/events/field-index/fields-subject.md#subject.token.impersonation) | `uint.enum` | via [`caller`](/peios/using-peios/events/groups/group-caller.md) | The impersonation level of the effective token. |
| [`object.kind`](/peios/using-peios/events/field-index/fields-object.md#object.kind) | `str.enum` | required | Always `key`. |
| [`object.key.guid`](/peios/using-peios/events/field-index/fields-object.md#object.key.guid) | `bin.guid` | required | The registry key an operation acted on. |
| [`object.key.path`](/peios/using-peios/events/field-index/fields-object.md#object.key.path) | `str` | required | The resolved absolute path of the registry key, in canonical form, such as `Machine\System\KMES`. |
| [`object.key.layer.name`](/peios/using-peios/events/field-index/fields-object.md#object.key.layer.name) | `str` | optional | The layer whose entry was deleted. |
| [`object.layer.name`](/peios/using-peios/events/field-index/fields-object.md#object.layer.name) | `str` | optional | Present when the delete removed a layer, naming it. |
| [`access.requested`](/peios/using-peios/events/field-index/fields-access.md#access.requested) | `uint.mask` | required | Always `DELETE`. |
| [`access.granted`](/peios/using-peios/events/field-index/fields-access.md#access.granted) | `uint.mask` | required | The access mask in force. |
| [`access.matched`](/peios/using-peios/events/field-index/fields-access.md#access.matched) | `uint.mask` | required | The subset of the requested access that overlapped an audit mask and therefore caused the record to exist. |
| [`access.audit-mask`](/peios/using-peios/events/field-index/fields-access.md#access.audit-mask) | `uint.mask` | required | The full continuous-audit mask cached on a handle, of which `access.matched` is the part this operation touched. |
| [`transaction.id`](/peios/using-peios/events/field-index/fields-transaction.md#transaction.id) | `uint` | optional | The transaction the operation belonged to, registry or package. |
| [`request.timed-out`](/peios/using-peios/events/field-index/fields-request.md#request.timed-out) | `bool` | when `outcome.success == false` | Whether a request's wait for the source's reply ran out before the reply arrived. |
| [`outcome.success`](/peios/using-peios/events/field-index/fields-outcome.md#outcome.success) | `bool` | required | Whether the operation succeeded. |
| [`outcome.errno`](/peios/using-peios/events/field-index/fields-outcome.md#outcome.errno) | `int.errno` | when `outcome.success == false` | The error the operation failed with, as a negative errno. |

Every record also carries the header fields of [the envelope](/peios/using-peios/events/introduction/the-envelope.md), which no payload repeats.

*Generated from `lcs.evman` by `pkm/tools/gen-events-book.py`. Edit the fragment, not this page.*