name: Disable Windows Behavior Monitoring
id: 79439cae-9200-11eb-a4d3-acde48001122
version: 2
date: '2022-01-27'
author: Teoderick Contreras, Splunk
status: production
type: TTP
description: This search is to identifies a modification in registry to disable the
  windows denfender real time behavior monitoring. This event or technique is commonly
  seen in RAT, bot, or Trojan to disable AV to evade detections.
data_source:
- Sysmon Event ID 13
search:
  selection1:
    Details: '0x00000001'
    TargetObject:
    - '*\\Real-Time Protection\\DisableScriptScanning'
    - '*\\Real-Time Protection\\DisableIOAVProtection'
    - '*\\Real-Time Protection\\DisableIntrusionPreventionSystem'
    - '*\\SOFTWARE\\Microsoft\\Windows Defender\\Real-Time Protection\\DisableRealtimeMonitoring'
    - '*\\SOFTWARE\\Policies\\Microsoft\\Windows Defender\\Real-Time Protection\\DisableScanOnRealtimeEnable'
    - '*\\SOFTWARE\\Policies\\Microsoft\\Windows Defender\\Real-Time Protection\\DisableOnAccessProtection'
    - '*\\SOFTWARE\\Policies\\Microsoft\\Windows Defender\\Real-Time Protection\\DisableBehaviorMonitoring'
  condition: selection1
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: admin or user may choose to disable this windows features.
references:
- https://tccontre.blogspot.com/2020/01/remcos-rat-evading-windows-defender-av.html
tags:
  analytic_story:
  - Windows Defense Evasion Tactics
  - Ransomware
  - Revil Ransomware
  - Windows Registry Abuse
  - Azorult
  asset_type: Endpoint
  confidence: 100
  impact: 40
  message: Windows Defender real time behavior monitoring disabled on $dest
  mitre_attack_id:
  - T1562.001
  - T1562
  observable:
  - name: dest
    type: Endpoint
    role:
    - Victim
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  risk_score: 40
  security_domain: endpoint
tests:
- name: True Positive Test
  attack_data:
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-security.log
    source: WinEventLog:Security
    sourcetype: WinEventLog
    update_timestamp: true
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-system.log
    source: WinEventLog:System
    sourcetype: WinEventLog
    update_timestamp: true
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-sysmon.log
    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
    sourcetype: xmlwineventlog