name: Windows Service Create Kernel Mode Driver
id: 0b4e3b06-1b2b-4885-b752-cf06d12a90cb
version: 1
date: '2022-05-05'
author: Michael Haag, Splunk
type: TTP
datamodel:
- Endpoint
description: The following analytic identifes a new kernel driver being added to Windows
  using sc.exe. Adding a Kernel driver is not common day to day and should be investigated
  to further understand the source.
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
  as lastTime from datamodel=Endpoint.Processes where Processes.process_name=sc.exe
  Processes.process="*kernel*" by Processes.dest Processes.user Processes.parent_process_name
  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)`
  | `windows_service_create_kernel_mode_driver_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. In addition,
  confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
  endpoint product.
known_false_positives: False positives may be present based on common applications
  adding new drivers, however, filter as needed.
references:
- https://www.aon.com/cyber-solutions/aon_cyber_labs/yours-truly-signed-av-driver-weaponizing-an-antivirus-driver/
tags:
  analytic_story:
  - Windows Drivers
  - CISA AA22-320A
  asset_type: Endpoint
  cis20:
  - CIS 3
  - CIS 5
  - CIS 16
  confidence: 80
  context:
  - Source:Endpoint
  - Stage:Persistence
  dataset:
  - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1068/drivers/sc_kernel.log
  impact: 60
  kill_chain_phases:
  - Installation
  message: Service control, $process_name$, loaded a new kernel mode driver on $dest$
    by $user$.
  mitre_attack_id:
  - T1543.003
  - T1543
  - T1068
  nist:
  - DE.CM
  observable:
  - name: user
    type: User
    role:
    - Victim
  - name: dest
    type: Hostname
    role:
    - Victim
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  required_fields:
  - _time
  - Processes.dest
  - Processes.user
  - Processes.original_file_name
  - Processes.process_name
  - Processes.process
  - Processes.process_id
  - Processes.parent_process_path
  - Processes.process_path
  - Processes.parent_process_id
  risk_score: 48
  security_domain: endpoint
  supported_tas:
  - Splunk_TA_microsoft_sysmon