From 503ce68ee18331e63852257aaf47701b0a1aa3c1 Mon Sep 17 00:00:00 2001
From: mvelazco <mauricio.velazco@gmail.com>
Date: Wed, 1 Sep 2021 16:24:04 -0400
Subject: [PATCH] adding an extra detections

---
 .../domain_group_discovery_with_dsquery.yml   | 52 +++++++++++++++++++
 ...main_group_discovery_with_dsquery.test.yml | 12 +++++
 2 files changed, 64 insertions(+)
 create mode 100644 detections/endpoint/domain_group_discovery_with_dsquery.yml
 create mode 100644 tests/endpoint/domain_group_discovery_with_dsquery.test.yml

diff --git a/detections/endpoint/domain_group_discovery_with_dsquery.yml b/detections/endpoint/domain_group_discovery_with_dsquery.yml
new file mode 100644
index 0000000000..287f8d82fb
--- /dev/null
+++ b/detections/endpoint/domain_group_discovery_with_dsquery.yml
@@ -0,0 +1,52 @@
+name: Domain Group Discovery With Dsquery
+id: f0c9d62f-a232-4edd-b17e-bc409fb133d4
+version: 1
+date: '2021-09-01'
+author: Mauricio Velazco, Splunk
+type: Hunting
+datamodel:
+- Endpoint
+description: This analytic looks for the execution of `dsquery.exe` with command-line
+  arguments utilized to query for domain groups. The argument `group`, returns a list of all domain groups. 
+  Red Teams and adversaries alike use may leverage dsquery.exe to enumerate domain groups for situational awareness and Active Directory Discovery.
+search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
+  as lastTime from datamodel=Endpoint.Processes where (Processes.process_name="dsquery.exe") 
+  (Processes.process="*group*")
+  by Processes.dest Processes.user Processes.parent_process Processes.process_name
+  Processes.process Processes.process_id Processes.parent_process_id | `drop_dm_object_name(Processes)`
+  | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `domain_group_discovery_with_dsquery_filter`'
+how_to_implement: To successfully implement this search you need to be ingesting information
+  on process that include the name of the process responsible for the changes from
+  your endpoints into the `Endpoint` datamodel in the `Processes` node.
+known_false_positives: Administrators or power users may use this command for troubleshooting.
+references:
+- https://attack.mitre.org/techniques/T1069/002/
+tags:
+  analytic_story:
+  - Active Directory Discovery
+  dataset:
+  - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1069.002/AD_discovery/windows-sysmon.log
+  kill_chain_phases:
+  - Reconnaissance
+  mitre_attack_id:
+  - T1069.002
+  product:
+  - Splunk Enterprise
+  - Splunk Enterprise Security
+  - Splunk Cloud
+  required_fields:
+  - _time
+  security_domain: endpoint
+  impact: 30
+  confidence: 50
+  risk_score: 15
+  context:
+  - Source:Endpoint
+  - Stage:Discovery
+  - Stage:Recon
+  message: Domain group discovery enumeration on $dest$ by $user$
+  observable:
+  - name: dest
+    type: Endpoint
+    role:
+    - Victim
\ No newline at end of file
diff --git a/tests/endpoint/domain_group_discovery_with_dsquery.test.yml b/tests/endpoint/domain_group_discovery_with_dsquery.test.yml
new file mode 100644
index 0000000000..befd87f9f1
--- /dev/null
+++ b/tests/endpoint/domain_group_discovery_with_dsquery.test.yml
@@ -0,0 +1,12 @@
+name: Domain Group Discovery With Dsquery Unit Test
+tests:
+- name: Domain Group Discovery With Dsquery
+  file: endpoint/domain_group_discovery_with_dsquery.yml
+  pass_condition: '| stats count | where count > 0'
+  earliest_time: '-24h'
+  latest_time: 'now'
+  attack_data:
+  - file_name: windows-sysmon.log
+    data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1069.002/AD_discovery/windows-sysmon.log
+    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
+    sourcetype: xmlwineventlog
\ No newline at end of file