mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
P4T12ICK
78 lines
2.8 KiB
YAML
78 lines
2.8 KiB
YAML
name: Linux Node Privilege Escalation
|
|
id: 2e58a4ff-398f-42f4-8fd0-e01ebfe2a8ce
|
|
version: 1
|
|
date: '2022-07-31'
|
|
author: Gowthamaraj Rajendran, Splunk
|
|
status: production
|
|
type: Anomaly
|
|
description: Node.js is a back-end JavaScript runtime environment that is open-source,
|
|
cross-platform, runs on the V8 engine, and executes JavaScript code outside of a
|
|
web browser. It was created to help create scalable network applications. If the
|
|
binary is allowed to run as superuser by sudo, it does not drop the elevated privileges
|
|
and may be used to access the file system, escalate or maintain privileged access.
|
|
data_source:
|
|
- Sysmon Event ID 1
|
|
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
|
|
as lastTime from datamodel=Endpoint.Processes where Processes.process="*sudo*node*"
|
|
AND Processes.process="*-e*" AND Processes.process="*child_process.spawn*" AND Processes.process="*stdio*"
|
|
by Processes.dest Processes.user Processes.parent_process_name Processes.process_name
|
|
Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
|
|
| `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
|
|
| `linux_node_privilege_escalation_filter`'
|
|
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 are present based on automated tooling or system
|
|
administrative usage. Filter as needed.
|
|
references:
|
|
- https://gtfobins.github.io/gtfobins/docker/
|
|
- https://en.wikipedia.org/wiki/Node.js
|
|
tags:
|
|
analytic_story:
|
|
- Linux Privilege Escalation
|
|
- Linux Living Off The Land
|
|
asset_type: Endpoint
|
|
confidence: 50
|
|
impact: 80
|
|
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
|
|
required_fields:
|
|
- _time
|
|
- Processes.dest
|
|
- Processes.user
|
|
- Processes.parent_process_name
|
|
- Processes.process_name
|
|
- Processes.process
|
|
- Processes.process_id
|
|
- Processes.parent_process_id
|
|
risk_score: 40
|
|
security_domain: endpoint
|
|
tests:
|
|
- name: True Positive Test
|
|
attack_data:
|
|
- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1548/node/sysmon_linux.log
|
|
source: Syslog:Linux-Sysmon/Operational
|
|
sourcetype: sysmon_linux
|
|
update_timestamp: true
|