Merge pull request #1688 from splunk/remcos_registry

Remcos registry

detections/endpoint/remcos_client_registry_install_entry.yml

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+name: Remcos client registry install entry
+id: f2a1615a-1d63-11ec-97d2-acde48001122
+version: 1
+date: '2021-09-24'
+author: Bhavin Patel, Rod Soto, Splunk
+type: TTP
+datamodel:
+- Endpoint
+description: This search detects registry key license at host where Remcos RAT agent
+  is installed.
+search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
+  as lastTime values(Registry.registry_path) as  registry_path FROM datamodel=Endpoint.Registry
+  where (Registry.registry_key_name=*\\Software\\Remcos*) by Registry.dest  Registry.user
+  Registry.registry_key_name Registry.process_id| `drop_dm_object_name(Registry)`
+  | `security_content_ctime(lastTime)` | `security_content_ctime(firstTime)`|`remcos_client_registry_install_entry_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 `Registry` node. Also make sure
+  that this registry was included in your config files ex. sysmon config to be monitored.
+known_false_positives: unknown
+references:
+- https://attack.mitre.org/software/S0332/
+tags:
+  analytic_story:
+  - Remcos
+  dataset:
+  - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/remcos/remcos_panel_client/remcos_registry_entry.log
+  kill_chain_phases:
+  - Exploitation
+  mitre_attack_id:
+  - T1112
+  product:
+  - Splunk Enterprise
+  - Splunk Enterprise Security
+  - Splunk Cloud
+  required_fields:
+  - _time
+  - Registry.registry_path
+  - Registry.registry_key_name
+  - Registry.process_id
+  - Registry.dest
+  - Registry.user
+  security_domain: endpoint
+  impact: 90
+  confidence: 100
+  risk_score: 90
+  context:
+  - Source:Endpoint
+  message: A registry entry $registry_path$ with registry keyname $registry_key_name$
+    related to Remcos RAT in host $dest$
+  observable:
+  - name: dest
+    type: Hostname
+    role:
+    - Victim
+  automated_detection_testing: passed

tests/endpoint/remcos_client_registry_install_entry.test.yml

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+name: Remcos client registry install entry Unit Test
+tests:
+- name: Remcos client registry install entry
+  file: endpoint/remcos_client_registry_install_entry.yml
+  pass_condition: '| stats count | where count > 0'
+  earliest_time: '-15d'
+  latest_time: 'now'
+  attack_data:
+  - file_name: remcos_registry_entry.log
+    data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/remcos/remcos_panel_client/remcos_registry_entry.log
+    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
+    sourcetype: xmlwineventlog