From 55c5f297fc2fbfb77fc49a941559cc244bfc97de Mon Sep 17 00:00:00 2001
From: mvelazco <mauricio.velazco@gmail.com>
Date: Thu, 23 Feb 2023 16:22:09 -0500
Subject: [PATCH] adding dataset for T1620

---
 ...windows_common_language_runtime_loaded.yml | 54 +++++++++++++++++++
 ...ws_common_language_runtime_loaded.test.yml | 13 +++++
 2 files changed, 67 insertions(+)
 create mode 100644 detections/endpoint/windows_common_language_runtime_loaded.yml
 create mode 100644 tests/endpoint/windows_common_language_runtime_loaded.test.yml

diff --git a/detections/endpoint/windows_common_language_runtime_loaded.yml b/detections/endpoint/windows_common_language_runtime_loaded.yml
new file mode 100644
index 0000000000..3a929487c6
--- /dev/null
+++ b/detections/endpoint/windows_common_language_runtime_loaded.yml
@@ -0,0 +1,54 @@
+name: Windows Common Language Runtime Loaded
+id: aed3d140-5051-41d7-8fe9-af587700da4e
+version: 1
+date: '2023-02-23'
+author: Mauricio Velazco, Splunk
+type: TTP
+datamodel: []
+description: UPDATE_DESCRIPTION
+search: ' `sysmon` EventCode=7 (ImageLoaded="*\\mscoreei.dll" OR ImageLoaded="*\\mscorlib.ni.dll" OR ImageLoaded="*\\amsi.dll") AND NOT (Image IN("C:\\Windows\\*", "C:\\Program File*", "%systemroot%\\*"))  
+  | stats count min(_time) as firstTime max(_time) as lastTime by Image ImageLoaded Computer EventCode Signed ProcessId
+  | `security_content_ctime(firstTime)`
+  | `security_content_ctime(lastTime)`
+  | `windows_common_language_runtime_loaded_filter`'
+how_to_implement: UPDATE_HOW_TO_IMPLEMENT
+known_false_positives: UPDATE_KNOWN_FALSE_POSITIVES
+references:
+- REFERENCE
+tags:
+  analytic_story:
+  - UPDATE_STORY_NAME
+  asset_type: UPDATE asset_type
+  cis20:
+  - CIS 3
+  - CIS 5
+  - CIS 16
+  confidence: UPDATE value between 1-100
+  context:
+  - Update context
+  dataset:
+  - UPDATE_DATASET_URL
+  impact: UPDATE value between 1-100
+  kill_chain_phases:
+  - Weaponization
+  - Exploitation
+  - Installation
+  - Command & Control
+  message: UPDATE message
+  mitre_attack_id:
+  - T1003.002
+  nist:
+  - DE.CM
+  observable:
+  - name: UPDATE
+    type: UPDATE
+    role:
+    - UPDATE
+  product:
+  - Splunk Enterprise
+  - Splunk Enterprise Security
+  - Splunk Cloud
+  required_fields:
+  - UPDATE
+  risk_score: UPDATE (impact * confidence)/100
+  security_domain: endpoint
diff --git a/tests/endpoint/windows_common_language_runtime_loaded.test.yml b/tests/endpoint/windows_common_language_runtime_loaded.test.yml
new file mode 100644
index 0000000000..bcbc6d7af9
--- /dev/null
+++ b/tests/endpoint/windows_common_language_runtime_loaded.test.yml
@@ -0,0 +1,13 @@
+name: Windows Common Language Runtime Loaded Unit Test
+tests:
+- name: Windows Common Language Runtime Loaded
+  file: endpoint/windows_common_language_runtime_loaded.yml
+  pass_condition: '| stats count | where count > 0'
+  earliest_time: -24h
+  latest_time: now
+  attack_data:
+  - file_name: UPDATE
+    data: UPDATE
+    source: UPDATE
+    sourcetype: UPDATE
+    update_timestamp: true