splunk-security_content/detections/endpoint/suspicious_process_file_path.yml

name: Suspicious Process File Path
id: 9be25988-ad82-11eb-a14f-acde48001122
version: 1
date: '2021-05-05'
author: Teoderick Contreras, Splunk
type: TTP
datamodel:
- Endpoint
description: The following analytic will detect a suspicious process running in a
  file path where a process is not commonly seen and is most commonly used by malicious
  softtware. This behavior has been used by adversaries where they drop and run an
  exe in a path that is accessible without admin privileges.
search: '| tstats `security_content_summariesonly` count values(Processes.process_name)
  as process_name values(Processes.process) as process min(_time) as firstTime max(_time)
  as lastTime from datamodel=Endpoint.Processes where Processes.process_path = "*\\windows\\fonts\\*"
  OR Processes.process_path = "*\\windows\\temp\\*" OR Processes.process_path = "*\\users\\public\\*"
  OR Processes.process_path = "*\\windows\\debug\\*" OR Processes.process_path.file_path
  = "*\\Users\\Administrator\\Music\\*" OR Processes.process_path.file_path = "*\\Windows\\servicing\\*"
  OR Processes.process_path.file_path = "*\\Users\\Default\\*" OR Processes.process_path.file_path
  = "*Recycle.bin*" OR Processes.process_path = "*\\Windows\\Media\\*" OR Processes.process_path
  = "\\Windows\\repair\\*" OR Processes.process_path = "*\\temp\\*" by Processes.parent_process_name
  Processes.parent_process Processes.process_path Processes.dest Processes.user |
  `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
  | `suspicious_process_file_path_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 may allow execution of specific binaries in
  non-standard paths. Filter as needed.
references:
- https://www.trendmicro.com/vinfo/hk/threat-encyclopedia/malware/trojan.ps1.powtran.a/
tags:
  analytic_story:
  - XMRig
  automated_detection_testing: passed
  confidence: 50
  context:
  - Source:Endpoint
  - Stage:Execution
  - Stage:Initial Access
  dataset:
  - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/xmrig_miner/windows-sysmon.log
  impact: 70
  kill_chain_phases:
  - Exploitation
  message: Suspicioues process $Processes.process_path.file_path$ running from suspicious
    location
  mitre_attack_id:
  - T1543
  observable:
  - name: dest
    type: Endpoint
    role:
    - Victim
  - name: Processes.process_path.file_path
    type: File Name
    role:
    - Attacker
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  required_fields:
  - _time
  - Processes.process_name
  - Processes.process
  - Processes.parent_process_name
  - Processes.parent_process
  - Processes.process_path
  - Processes.dest
  - Processes.user
  risk_score: 35
  security_domain: endpoint