disable_defender_submit_samples_consent_feature.yml

name: Disable Defender Submit Samples Consent Feature
id: 73922ff8-3022-11ec-bf5e-acde48001122
version: 2
date: '2022-01-26'
author: Teoderick Contreras, Splunk
status: production
type: TTP
description: This analytic is intended to detect a suspicious modification of the
  Windows registry to disable a Windows Defender feature. This technique is intended
  to bypass or evade detection from Windows Defender AV, specifically the feature
  that submits samples for further analysis.
data_source:
- Sysmon Event ID 13
search:
  selection1:
    Registry.registry_value_name: SubmitSamplesConsent
    TargetObject: '*\\Microsoft\\Windows Defender\\SpyNet*'
    Details: '0x00000000'
  condition: selection1
how_to_implement: To successfully implement this search, you need to be ingesting
  logs with the registry value name, registry path, and registry value data from your
  endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the
  Sysmon TA.
known_false_positives: admin or user may choose to disable windows defender product
references:
- https://thedfirreport.com/2021/10/18/icedid-to-xinglocker-ransomware-in-24-hours/
tags:
  analytic_story:
  - IcedID
  - Windows Registry Abuse
  - Azorult
  asset_type: Endpoint
  confidence: 70
  impact: 70
  message: modified/added/deleted registry entry $Registry.registry_path$ in $dest$
  mitre_attack_id:
  - T1562.001
  - T1562
  observable:
  - name: dest
    type: Hostname
    role:
    - Victim
  - name: user
    type: User
    role:
    - Victim
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  risk_score: 49
  security_domain: endpoint
tests:
- name: True Positive Test
  attack_data:
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/icedid/disable_av/sysmon.log
    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
    sourcetype: xmlwineventlog