service

detections/endpoint/windows_krbrelayup_service_creation.yml

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+name: Windows KrbRelayUp Service Creation
+id: e40ef542-8241-4419-9af4-6324582ea60a
+version: 1
+date: '2022-05-02'
+author: Michael Haag, Splunk
+type: TTP
+datamodel:
+- Endpoint
+description: The following analytic identifies the default service name created by KrbRelayUp.
+search: '`wineventlog_system` EventCode=7045 Service_Name IN ("KrbSCM") | stats count min(_time) as firstTime max(_time) as lastTime by
+  EventCode Service_File_Name Service_Name Service_Start_Type Service_Type | `security_content_ctime(firstTime)`
+  | `security_content_ctime(lastTime)`
+  | `windows_krbrelayup_service_creation_filter`'
+how_to_implement: To successfully implement this search, you need to be ingesting
+  Windows System Event Logs with 7045 EventCode enabled. The Windows TA is also
+  required.
+known_false_positives: False positives should be limited as this is specific to KrbRelayUp based attack. Filter as needed.
+references:
+- https://github.com/Dec0ne/KrbRelayUp
+tags:
+  analytic_story:
+  - Local Privilege Escalation With KrbRelayUp
+  asset_type: Endpoint
+  cis20:
+  - CIS 3
+  - CIS 5
+  - CIS 16
+  confidence: 80
+  context:
+  - Source:Endpoint
+  dataset:
+  - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1558/krbrelayup/krbrelayup.log
+  impact: 80
+  kill_chain_phases:
+  - Exploitation
+  message: A service was created on $dest$, related to KrbRelayUp.
+  mitre_attack_id:
+  - T1543.003
+  nist:
+  - DE.CM
+  observable:
+  - name: dest
+    type: Endpoint
+    role:
+    - Victim
+  product:
+  - Splunk Enterprise
+  - Splunk Enterprise Security
+  - Splunk Cloud
+  required_fields:
+  - _time
+  - EventCode
+  - Service_File_Name
+  - Service_Name 
+  - Service_Start_Type 
+  - Service_Type
+  risk_score: 64
+  security_domain: endpoint

tests/endpoint/windows_krbrelayup_service_creation.test.yml

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+name: Windows KrbRelayUp Service Creation Unit Test
+tests:
+- name: Windows KrbRelayUp Service Creation
+  file: endpoint/windows_krbrelayup_service_creation.yml
+  pass_condition: '| stats count | where count > 0'
+  earliest_time: -24h
+  latest_time: now
+  attack_data:
+  - file_name: windows-system.log
+    data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1543.003/krbrelayup/windows-system.log
+    source: WinEventLog:System
+    sourcetype: WinEventLog