Mount Execution With Hidepid Parameter — Sigma Rule

Rule metadata and linked tags

Author: Joseliyo Sanchez, @Joseliyo_Jstnk. Source status: test; severity: medium. Source dates: 2023-01-12 / not supplied.

{
  "product": "linux",
  "category": "process_creation"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: ba2795e4076f83db9900ce620c5ce979fec61384003d4ff055337c8e68ac0edc

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Mount Execution With Hidepid Parameter
id: ec52985a-d024-41e3-8ff6-14169039a0b3
status: test
description: Detects execution of the "mount" command with "hidepid" parameter to make invisible processes to other users from the system
references:
    - https://blogs.blackberry.com/
    - https://www.cyberciti.biz/faq/linux-hide-processes-from-other-users/
    - https://twitter.com/Joseliyo_Jstnk/status/1620131033474822144
author: Joseliyo Sanchez, @Joseliyo_Jstnk
date: 2023-01-12
tags:
    - attack.credential-access
    - attack.stealth
    - attack.t1564
logsource:
    product: linux
    category: process_creation
detection:
    selection:
        Image|endswith: '/mount'
        CommandLine|contains|all:
            - 'hidepid=2'
            - ' -o '
    condition: selection
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://blogs.blackberry.com/
• https://www.cyberciti.biz/faq/linux-hide-processes-from-other-users/
• https://twitter.com/Joseliyo_Jstnk/status/1620131033474822144