splunk-security_content/dev/endpoint/disable_defender_enhanced_notification.yml

name: Disable Defender Enhanced Notification
id: dc65678c-301f-11ec-8e30-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 registry
  to disable windows defender features. This technique attempts to bypass or evade
  detection from Windows Defender AV, specifically the Enhanced Notification feature
  where a user or admin would receive alerts.
data_source:
- Sysmon Event ID 13
search:
  selection1:
    Registry.registry_value_name: DisableEnhancedNotifications
    TargetObject: '*Microsoft\\Windows Defender\\Reporting*'
    Details: '0x00000001'
  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 executions
  from your endpoints. If you are using Sysmon, you must have at least version 6.0.4
  of the Sysmon TA.
known_false_positives: user may choose to disable windows defender AV
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 $registry_path$ 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