name: Detect Remote Access Software Usage Process
id: ffd5e001-2e34-48f4-97a2-26dc4bb08178
version: 2
date: '2024-05-23'
author: Steven Dick
status: production
type: Anomaly
description: The following analytic detects the execution of known remote access software
  within the environment. It leverages data from Endpoint Detection and Response (EDR)
  agents, focusing on process names and parent processes mapped to the Endpoint data
  model. This activity is significant as adversaries often use remote access tools
  like AnyDesk, GoToMyPC, LogMeIn, and TeamViewer to maintain unauthorized access.
  If confirmed malicious, this could allow attackers to control systems remotely,
  exfiltrate data, or deploy additional malware, posing a severe threat to the organization's
  security.
data_source:
- Sysmon EventID 1
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
  as lastTime values(Processes.parent_process) as parent_process from datamodel=Endpoint.Processes
  where Processes.dest!=unknown Processes.process!=unknown by Processes.dest Processes.user
  Processes.process_name Processes.process | `security_content_ctime(firstTime)` |
  `security_content_ctime(lastTime)` | `drop_dm_object_name(Processes)` | lookup remote_access_software
  remote_utility AS process_name OUTPUT isutility, description as signature, comment_reference
  as desc, category | search isutility = True | `detect_remote_access_software_usage_process_filter`'
how_to_implement: The detection is based on data that originates from Endpoint Detection
  and Response (EDR) agents. These agents are designed to provide security-related
  telemetry from the endpoints where the agent is installed. To implement this search,
  you must ingest logs that contain the process GUID, process name, and parent process.
  Additionally, you must ingest complete command-line executions. These logs must
  be processed using the appropriate Splunk Technology Add-ons that are specific to
  the EDR product. The logs must also be mapped to the `Processes` node of the `Endpoint`
  data model. Use the Splunk Common Information Model (CIM) to normalize the field
  names and speed up the data modeling process.
known_false_positives: It is possible that legitimate remote access software is used
  within the environment. Ensure that the lookup is reviewed and updated with any
  additional remote access software that is used within the environment.
references:
- https://attack.mitre.org/techniques/T1219/
- https://thedfirreport.com/2022/08/08/bumblebee-roasts-its-way-to-domain-admin/
- https://thedfirreport.com/2022/11/28/emotet-strikes-again-lnk-file-leads-to-domain-wide-ransomware/
tags:
  analytic_story:
  - Insider Threat
  - Command And Control
  - Ransomware
  asset_type: Endpoint
  confidence: 50
  impact: 50
  message: A process for a known remote access software $process_name$ was identified
    on $dest$.
  mitre_attack_id:
  - T1219
  observable:
  - name: dest
    type: Hostname
    role:
    - Victim
  - name: user
    type: User
    role:
    - Victim
  - name: process_name
    type: Process
    role:
    - Attacker
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  required_fields:
  - _time
  - Processes.dest
  - Processes.user
  - Processes.process_name
  - Processes.process
  - Processes.process_id
  - Processes.parent_process_name
  risk_score: 25
  security_domain: endpoint
tests:
- name: True Positive Test
  attack_data:
  - data: 
      https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1219/screenconnect/screenconnect_sysmon.log
    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
    sourcetype: XmlWinEventLog