name: Runas Execution in CommandLine
id: 4807e716-43a4-11ec-a0e7-acde48001122
version: 1
date: '2021-11-12'
author: Teoderick Contreras, Splunk
status: production
type: Hunting
description: This analytic look for a spawned runas.exe process with a administrator
  user option parameter. This parameter was abused by adversaries, malware author
  or even red teams to gain elevated privileges in target host. This is a good hunting
  query to figure out privilege escalation tactics that may used for different stages
  like lateral movement but take note that administrator may use this command in purpose
  so its better to see other event context before and after this analytic.
data_source:
- Sysmon Event ID 1
search:
  selection1:
    OriginalFileName: runas.exe
  selection2:
    Image|endswith: runas.exe
  selection3:
    CommandLine: '*/user:*'
  selection4:
    CommandLine: '*admin*'
  condition: (selection1 or selection2) and selection3 and selection4
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. In addition,
  confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
  endpoint product.
known_false_positives: A network operator or systems administrator may utilize an
  automated or manual execute this command that may generate false positives. filter
  is needed.
references:
- https://app.any.run/tasks/ad4c3cda-41f2-4401-8dba-56cc2d245488/
tags:
  analytic_story:
  - Windows Privilege Escalation
  - Hermetic Wiper
  asset_type: Endpoint
  confidence: 50
  impact: 50
  message: elevated process using runas on $dest$ by $user$
  mitre_attack_id:
  - T1134
  - T1134.001
  observable:
  - name: dest
    type: Endpoint
    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/vilsel/sysmon.log
    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
    sourcetype: xmlwineventlog