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[Detection Engine][Exceptions] - Update docs for single and shared exceptions #4021

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4 changes: 4 additions & 0 deletions docs/detections/api/det-api-index.asciidoc
Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,10 @@ include::rules/rules-api-delete.asciidoc[]

include::rules/rules-api-bulk-actions.asciidoc[]

include::rules/rules-api-create-rule-default-exception-list.asciidoc[]

include::rules/rules-api-create-single-rule-exception-item.asciidoc[]

include::rules/index-api-overview.asciidoc[]

include::rules/tags-api-overview.asciidoc[]
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Original file line number Diff line number Diff line change
Expand Up @@ -41,10 +41,11 @@ provided.
|No, defaults to `single`.
|`tags` |String[] |String array containing words and phrases to help categorize
exception containers. |No
|`type` |String a|The type of exception, which must be one of these:
|`type` |String a|The type of exception list, which must be one of these:

* `detection`: Detection rule exception
* `endpoint`: Endpoint alert exception
* `detection`: Shared rule exception
* `endpoint`: Endpoint rule exception
* `rule_default`: Single rule exception

|Yes

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28 changes: 15 additions & 13 deletions docs/detections/api/exceptions/api-create-exception-item.asciidoc
Original file line number Diff line number Diff line change
@@ -1,24 +1,26 @@
[[exceptions-api-create-exception-item]]
=== Create exception item
=== Create exceptions used by multiple rules

Creates an exception item and associates it with the specified
<<exceptions-api-create-container, exception container>>.
Creates an exception item that you can add to a shared exception list or endpoint exception list.

Refer to <<lists-api-overview>> for information about creating exception items from
lists, such as a list of IP addresses or host names.
TIP: Refer to <<exceptions-api-create-rule-default-exception-item>> for information about creating exceptions for a single rule.

NOTE: Before creating exception items, you must create an exception container.

IMPORTANT: Endpoint rule exception items cannot use
[IMPORTANT]
=====
* Before creating exception items, you must create an <<exceptions-api-create-container, exception container>>. After creating the container, you can associate exception items with it.
* Endpoint rule exception items cannot use
<<lists-api-overview, lists>> (the `list` in the `entries` array), and the
following fields cannot be used in exception queries (as `field` values in the
`entries` object):

* `file.Ext.quarantine_path`
* `file.Ext.quarantine_result`
* `process.entity_id`
* `process.parent.entity_id`
* `process.ancestry`
** `file.Ext.quarantine_path`
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@caitlinbetz is this still accurate? I know we opened endpoint exceptions up to have less field restrictions, not sure if these still hold.

** `file.Ext.quarantine_result`
** `process.entity_id`
** `process.parent.entity_id`
** `process.ancestry`
=====

NOTE: Refer to <<lists-api-overview>> for information about creating exception items from lists, such as a list of IP addresses or host names.

==== Request URL

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Original file line number Diff line number Diff line change
Expand Up @@ -29,8 +29,11 @@ the container's `id` field is not used.
exception containers. |No
|`type` |String a|The type of exception, which must be one of these:

* `detection`: Detection rule exception
* `endpoint`: Endpoint alert exception
|`type` |String a|The type of exception list, which must be one of these:

* `detection`: Shared rule exception
* `endpoint`: Endpoint rule exception
* `rule_default`: Single rule exception

|Yes

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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
[[exceptions-api-update-item]]
=== Update exception item
//Check if this endpoint can also be used to update rule default exceptions.

Updates an existing exception item.

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@@ -0,0 +1,105 @@
[[exceptions-api-create-rule-default-exception-list]]
=== Create default exception list for a rule

Creates a default exception list for the rule you specify. Default exception lists can only be associated with a single rule.

To add exception items to a default exception list, pass in exceptions items that you want applied to the rule. Refer to <<exceptions-api-create-rule-default-exception-item>> for more information.

When an exception item’s query evaluates to `true`, the associated rule does not issue alerts even when its other criteria are met.

NOTE: Default exception lists do not display on the <<shared-exception-lists, Shared Exception Lists>> page in the {security-app} UI.
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==== Request URL

`POST <kibana host>:<port>/api/detection_engine/<rule_id>/exceptions`

==== Request body

A JSON object with these fields:

[width="100%",options="header"]
|==============================================
|Name |Type |Description |Required

|`description` |String |Describes the exception container. |Yes
|`list_id` |String |Unique identifier. |No, automatically created when it is not
provided.
|`meta` |Object |Placeholder for metadata about the list container. |No
|`name` |String |The exception container's name. |Yes
|`namespace_type` |String a|Determines whether the exception container is available in all {kib} spaces or just the space in which it is created, where:

* `single`: Only available in the {kib} space in which it is created.
* `agnostic`: Available in all {kib} spaces.

|No, defaults to `single`.
|`tags` |String[] |String array containing words and phrases to help categorize
exception containers. |No
|`type` |String a|The type of exception, which must be:

* `rule_default`: Exception list that belongs to a single rule

|Yes

|==============================================

===== Example requests

Creates an exception container for holding trusted Linux process exception
items:

[source,console]
--------------------------------------------------
POST api/exception_lists
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{
"description": "Excludes Linux trusted processes",
"name": "Linux process exceptions",
"list_id": "trusted-linux-processes",
"type": "detection",
"namespace_type": "single",
"tags": [
"linux",
"processes"
]
}
--------------------------------------------------
// KIBANA

==== Response code

`200`::
Indicates a successful call.


==== Response payload

The exception container object with a unique ID.

[source,json]
--------------------------------------------------
{
"_tags": [],
"created_at": "2020-07-13T09:33:46.187Z",
"created_by": "elastic",
"description": "Excludes Linux trusted processes",
"id": "f320c070-c4eb-11ea-80bb-11861bae2798", <1>
"list_id": "trusted-linux-processes", <2>
"name": "Linux process exceptions",
"namespace_type": "single", <3>
"tags": [
"linux",
"processes"
],
"tie_breaker_id": "2c08d5a5-2ecc-4d5a-acfb-0a367f25b3f3",
"type": "detection", <4>
"updated_at": "2020-07-13T09:33:46.359Z",
"updated_by": "elastic"
}
--------------------------------------------------

These values are required to associate the exception container with detection
rules:

<1> `id`
<2> `list_id`
<3> `namespace_type`
<4> `type`
Original file line number Diff line number Diff line change
@@ -0,0 +1,86 @@
[[exceptions-api-create-rule-default-exception-item]]
=== Create exceptions for a rule

Allows you to create exception items that are associated with a specified rule `id`.
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==== Request URL

`POST <kibana host>:<port>/api/detection_engine/rules/<id>/exceptions`

//include a tip on how to find a rule's ID
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==== Request body

A JSON object with an array of exception items, where each exception item has the <<exceptions-api-create-exception-item,required fields>>.

[width="100%",options="header"]
|==============================================
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|Name |Type |Description |Required

|`items` |String | Specify an array of exception list items to create. |Yes

|==============================================

===== Example requests

[source,console]
--------------------------------------------------
POST api/detection_engine/rules/<id>/exceptions
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{
"items": [
{
"field": "process.name",
"operator": "included",
"type": "match",
"value": "maintenance-job"
}
],
"list_id": "trusted-linux-processes",
"name": "Linux maintenance job",
"namespace_type": "single",
"tags": [
"in-house processes",
"linux"
],
"type": "simple"
}
--------------------------------------------------

==== Response code

`200`::
Indicates a successful call.

==== Response payload

The returned exception item.

Example response:

[source,json]
--------------------------------------------------
{
"body": [
{
"comments": [],
"created_by": "elastic",
"description": "Exception item for rule default exception list",
"entries": [
{
"field": "host.name",
"operator": "included",
"type": "match",
"value": "foo",
},
],
"name": "Sample exception item",
"list_id": "e6c44050-c661-11ea-bab5-9d6ae015701b",
"namespace_type": "single",
"os_types": [],
"tags": [],
"type": "simple",
"updated_by": "elastic"
}
]
}
--------------------------------------------------
2 changes: 2 additions & 0 deletions docs/detections/api/rules/rules-api-overview.asciidoc
Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,8 @@ tags
returns alerts, and updates their statuses
* `<kibana host>:<port>/api/detection_engine/rules/prepackaged` - Loads and retrieves
the status of Elastic <<prebuilt-rules, prebuilt rules>>
* `<kibana host>:<port>/api/detection_engine/<rule_id>/exceptions` - Creates a default exception list for the rule you specify
* `<kibana host>:<port>/api/detection_engine/rules/<id>/exceptions` - Creates exception items for the rule you specify

TIP: You can view and download a Detections API Postman collection
https://github.com/elastic/examples/tree/master/Security%20Analytics/SIEM-examples/Detections-API[here].
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1 change: 1 addition & 0 deletions docs/siem-apis.asciidoc
Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ NOTE: Console supports sending requests to {kib} APIs. Prepend any {kib} API end
`GET kbn:/api/index_management/indices`

* <<rule-api-overview>>: Manage detection rules and alerts
//Might need to udpdate this description since there are now exception endpoints under the detection rule API.
* <<exceptions-api-overview>>: Create and manage rule exceptions
* <<lists-api-overview>>: Create source event value lists for use with rule exceptions
* <<timeline-api-overview>>: Import and export timelines
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