disabling_defender_services.yml

name: Disabling Defender Services
id: 911eacdc-317f-11ec-ad30-acde48001122
version: 2
date: '2022-01-28'
author: Teoderick Contreras, Splunk
status: production
type: TTP
description: This particular behavior is typically executed when an adversaries or
  malware gains access to an endpoint and beings to perform execution and to evade
  detections. Usually, a batch (.bat) will be executed and multiple registry and scheduled
  task modifications will occur. During triage, review parallel processes and identify
  any further file modifications. Endpoint should be isolated.
data_source:
- Sysmon Event ID 13
search:
  selection1:
    TargetObject:
    - '*WdBoot*'
    - '*WdFilter*'
    - '*WdNisDrv*'
    - '*WdNisSvc*'
    - '*WinDefend*'
    - '*SecurityHealthService*'
  selection2:
    TargetObject: '*\\System\\CurrentControlSet\\Services\\*'
  selection3:
    Details: '0x00000004'
    Registry.registry_value_name: Start
  condition: selection1 and selection2 and selection3
how_to_implement: To successfully implement this search, you need to be ingesting
  logs with the process name, parent process, and command-line 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: 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
  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/sysmon2.log
    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
    sourcetype: xmlwineventlog