name: Linux Clipboard Data Copy
id: 7173b2ad-6146-418f-85ae-c3479e4515fc
version: 1
date: '2022-07-28'
author: Michael Haag, Splunk
status: production
type: Anomaly
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.
data_source:
- Sysmon Event ID 1
search:
  selection1:
    CommandLine:
    - '*-o *'
    - '*-sel *'
    - '*-selection *'
    - '*clip *'
    - '*clipboard*'
    Image|endswith: xclip
  condition: selection1
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
  confidence: 40
  impact: 40
  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
  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
  risk_score: 16
  security_domain: endpoint
tests:
- name: True Positive Test
  attack_data:
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1115/atomic_red_team/linux-sysmon.log
    source: Syslog:Linux-Sysmon/Operational
    sourcetype: sysmon_linux
    update_timestamp: true