allow_operation_with_consent_admin.yml

name: Allow Operation with Consent Admin
id: 7de17d7a-c9d8-11eb-a812-acde48001122
version: 2
date: '2022-01-26'
author: Teoderick Contreras, Splunk
status: production
type: TTP
description: This analytic identifies a potential privilege escalation attempt to
  perform malicious task. This registry modification is designed to allow the `Consent
  Admin` to perform an operation that requires elevation without consent or credentials.
  We also found this in some attacker to gain privilege escalation to the compromise
  machine.
data_source:
- Sysmon Event ID 13
search:
  selection1:
    Registry.registry_value_name: ConsentPromptBehaviorAdmin
    TargetObject: '*\\Microsoft\\Windows\\CurrentVersion\\Policies\\System*'
    Details: '0x00000000'
  condition: selection1
how_to_implement: To successfully implement this search, you must be ingesting data
  that records registry activity from your hosts to populate the endpoint data model
  in the registry node. This is typically populated via endpoint detection-and-response
  product, such as Carbon Black or endpoint data sources, such as Sysmon. The data
  used for this search is typically generated via logs that report reads and writes
  to the registry.
known_false_positives: unknown
references:
- https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-gpsb/341747f5-6b5d-4d30-85fc-fa1cc04038d4
- https://www.trendmicro.com/vinfo/no/threat-encyclopedia/malware/Ransom.Win32.MRDEC.MRA/
tags:
  analytic_story:
  - Ransomware
  - Windows Registry Abuse
  - Azorult
  asset_type: Endpoint
  confidence: 50
  impact: 50
  message: Suspicious registry modification was performed on endpoint $dest$ by user
    $user$. This behavior is indicative of privilege escalation.
  mitre_attack_id:
  - T1548
  observable:
  - name: user
    type: User
    role:
    - Victim
  - name: dest
    type: Hostname
    role:
    - Victim
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  risk_score: 25
  security_domain: endpoint
tests:
- name: True Positive Test
  attack_data:
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/ransomware_ttp/data1/windows-sysmon.log
    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
    sourcetype: xmlwineventlog