ESXi Syslog Configuration Change Via ESXCLI — Sigma Rule

Rule metadata and linked tags

Author: Cedric Maurugeon. Source status: test; severity: medium. Source dates: 2023-09-04 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: eac0c07f67091c593b312590e97b422272ccfb1ad1c41a510a7326607f55c6a8

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: ESXi Syslog Configuration Change Via ESXCLI
id: 38eb1dbb-011f-40b1-a126-cf03a0210563
status: test
description: Detects changes to the ESXi syslog configuration via "esxcli"
references:
    - https://support.solarwinds.com/SuccessCenter/s/article/Configure-ESXi-Syslog-to-LEM?language=en_US
    - https://developer.broadcom.com/xapis/esxcli-command-reference/7.0.0/namespace/esxcli_system.html
author: Cedric Maurugeon
date: 2023-09-04
tags:
    - attack.execution
    - attack.defense-impairment
    - attack.t1685
    - attack.t1690
    - attack.t1059.012
logsource:
    category: process_creation
    product: linux
detection:
    selection:
        Image|endswith: '/esxcli'
        CommandLine|contains|all:
            - 'system'
            - 'syslog'
            - 'config'
        CommandLine|contains: ' set'
    condition: selection
falsepositives:
    - Legitimate administrative activities
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate administrative activities

Source references

• https://support.solarwinds.com/SuccessCenter/s/article/Configure-ESXi-Syslog-to-LEM?language=en_US
• https://developer.broadcom.com/xapis/esxcli-command-reference/7.0.0/namespace/esxcli_system.html