name: Linux Clipboard Data Copy
id: 7173b2ad-6146-418f-85ae-c3479e4515fc
version: 1
date: '2022-07-28'
author: Michael Haag, Splunk
type: Anomaly
datamodel:
- Endpoint
description: The following analytic identifies the use of Linux Xclip copying data out of the clipboard. Adversaries have utilized this technique to capture passwords, IP addresses, or store payloads.
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
  as lastTime from datamodel=Endpoint.Processes where Processes.process_name=xclip Processes.process IN ("*-o *", "*-sel *", "*-selection *", "*clip *","*clipboard*")
  by Processes.dest Processes.user Processes.parent_process_name 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)` 
  | `linux_clipboard_data_copy_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. In addition, confirm the latest CIM App 4.20 or higher is installed and the latest TA for the endpoint product.
known_false_positives: False positives may be present on Linux desktop as it may commonly be used by administrators or end users. Filter as needed. 
references:
  - https://attack.mitre.org/techniques/T1115/
  - https://linux.die.net/man/1/xclip
tags:
  analytic_story:
  - Linux Living Off The Land
  asset_type: Endpoint
  cis20:
  - CIS 3
  - CIS 5
  - CIS 16
  confidence: 40
  context:
  - Source:Endpoint
  - Stage:Discovery
  dataset:
  - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1115/atomic_red_team/linux-sysmon.log
  impact: 40
  kill_chain_phases:
  - Reconnaissance
  message: An instance of $process_name$ was identified on endpoint $dest$ by user $user$ adding or removing content from the clipboard.
  mitre_attack_id:
  - T1115
  nist:
  - DE.CM
  observable:
  - name: user
    type: User
    role:
    - Victim
  - name: dest
    type: Hostname
    role:
    - Victim
  - name: process_name
    type: Process
    role:
    - Child Process
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  required_fields:
  - _time
  - Processes.dest
  - Processes.user
  - Processes.parent_process_name #parent process name
  - Processes.parent_process #parent cmdline
  - Processes.original_file_name
  - Processes.process_name #process name
  - Processes.process #process cmdline
  - Processes.process_id
  - Processes.parent_process_path
  - Processes.process_path
  - Processes.parent_process_id
  risk_score: 16
  security_domain: endpoint