splunk-security_content/detections/endpoint/network_connection_discovery_net.yml

name: Network Connection Discovery With Net
id: 640337e5-6e41-4b7f-af06-9d9eab5e1e2d
version: 1
date: '2021-09-10'
author: Mauricio Velazco, Splunk
type: Hunting
datamodel:
- Endpoint
description: This analytic looks for the execution of `net.exe` with command-line
  arguments utilized to get a listing of network connections on a compromised system.
  Red Teams and adversaries alike may use net.exe for situational awareness and Active
  Directory Discovery.
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
  as lastTime from datamodel=Endpoint.Processes where (Processes.process_name="net.exe"
  OR Processes.process_name="net1.exe") (Processes.process=*use*) by Processes.dest
  Processes.user Processes.parent_process Processes.process_name Processes.process
  Processes.process_id Processes.parent_process_id | `drop_dm_object_name(Processes)`
  | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `network_connection_discovery_with_net_filter`'
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 `Processes` node.
known_false_positives: Administrators or power users may use this command for troubleshooting.
references:
- https://attack.mitre.org/techniques/T1049/
tags:
  analytic_story:
  - Active Directory Discovery
  - Azorult
  - Windows Post-Exploitation
  - Prestige Ransomware
  confidence: 50
  context:
  - Source:Endpoint
  - Stage:Discovery
  - Stage:Recon
  dataset:
  - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1049/AD_discovery/windows-sysmon.log
  impact: 30
  kill_chain_phases:
  - Reconnaissance
  message: Network Connection discovery on $dest$ by $user$
  mitre_attack_id:
  - T1049
  observable:
  - name: dest
    type: Endpoint
    role:
    - Victim
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  required_fields:
  - Processes.dest
  - Processes.user
  - Processes.parent_process_name
  - Processes.parent_process
  - Processes.original_file_name
  - Processes.process_name
  - Processes.process
  - Processes.process_id
  - Processes.parent_process_path
  - Processes.process_path
  - Processes.parent_process_id
  risk_score: 15
  security_domain: endpoint
  asset_type: Endpoint