Linux Sudo Chroot Execution — Sigma Rule

Rule metadata and linked tags

Author: Swachchhanda Shrawn Poudel (Nextron Systems). Source status: experimental; severity: low. Source dates: 2025-10-02 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: db8911e31e661b34c46d79c856e996e2a0ca5082e309795d5641e6b5d682c4a2

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: Linux Sudo Chroot Execution
id: f2bed782-994e-4f40-9cd5-518198cb3fba
status: experimental
description: |
    Detects the execution of 'sudo' command with '--chroot' option, which is used to change the root directory for command execution.
    Attackers may use this technique to evade detection and execute commands in a modified environment.
    This can be part of a privilege escalation strategy, as it allows the execution of commands with elevated privileges in a controlled environment as seen in CVE-2025-32463.
    While investigating, look out for unusual or unexpected use of 'sudo --chroot' in conjunction with other commands or scripts such as execution from temporary directories or unusual user accounts.
references:
    - https://github.com/kh4sh3i/CVE-2025-32463/blob/81bb430f84fa2089224733c3ed4bfa434c197ad4/exploit.sh
author: Swachchhanda Shrawn Poudel (Nextron Systems)
date: 2025-10-02
tags:
    - attack.privilege-escalation
    - attack.t1068
logsource:
    category: process_creation
    product: linux
detection:
    selection:
        Image|endswith: '/sudo'
        CommandLine|contains:
            - ' --chroot '
            - 'sudo -R '
    condition: selection
falsepositives:
    - Legitimate administrative tasks or scripts that use 'sudo --chroot' for containerization, testing, or system management.
level: low

Original YAML and metadata in JSON

False positives

• Legitimate administrative tasks or scripts that use 'sudo --chroot' for containerization, testing, or system management.

Source references

• https://github.com/kh4sh3i/CVE-2025-32463/blob/81bb430f84fa2089224733c3ed4bfa434c197ad4/exploit.sh