name: Linux apt-get Privilege Escalation
id: d870ce3b-e796-402f-b2af-cab4da1223f2
version: 1
date: '2022-08-11'
author: Gowthamaraj Rajendran, Splunk
status: production
type: Anomaly
description: The apt-get is a command line tool for interacting with the Advanced
  Package Tool (APT) library (a package management system for Linux distributions).
  It allows you to search for, install, manage, update, and remove software. The tool
  does not build software from the source code. If sudo right is given to the tool
  for user, then the user can run system commands as root and possibly get a root
  shell.
data_source:
- Sysmon Event ID 1
search:
  selection1:
    CommandLine: '*APT::Update::Pre-Invoke::*'
  selection2:
    CommandLine: '*apt-get*'
  selection3:
    CommandLine: '*sudo*'
  condition: selection1 and selection2 and selection3
how_to_implement: To successfully implement this search, you need to be ingesting
  logs with the process name, parent process, and command-line executions from your
  endpoints into the Endpoint datamodel. If you are using Sysmon, you can use the
  Add-on for Linux Sysmon from Splunkbase.
known_false_positives: False positives may be present, filter as needed.
references:
- https://gtfobins.github.io/gtfobins/apt-get/
- https://phoenixnap.com/kb/how-to-use-apt-get-commands
tags:
  analytic_story:
  - Linux Privilege Escalation
  - Linux Living Off The Land
  asset_type: Endpoint
  confidence: 50
  impact: 20
  message: An instance of $parent_process_name$ spawning $process_name$ was identified
    on endpoint $dest$
  mitre_attack_id:
  - T1548.003
  - T1548
  observable:
  - name: dest
    type: Hostname
    role:
    - Victim
  - name: parent_process_name
    type: Process
    role:
    - Parent Process
  - name: process_name
    type: Process
    role:
    - Child Process
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  risk_score: 10
  security_domain: endpoint
tests:
- name: True Positive Test
  attack_data:
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1548/apt_get/sysmon_linux.log
    source: Syslog:Linux-Sysmon/Operational
    sourcetype: sysmon_linux
    update_timestamp: true