sigmaDRL-1.1from SigmaHQ/sigma

ESXi System Information Discovery Via ESXCLI

Detects execution of the "esxcli" command with the "system" flag in order to retrieve information about the different component of the system. Such as accounts, modules, NTP, etc.

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ATT&CK techniques

T1033 T1007 T1059.012

Rule sourcerules/linux/process_creation/proc_creation_lnx_esxcli_system_discovery.yml

title: ESXi System Information Discovery Via ESXCLI
id: e80273e1-9faf-40bc-bd85-dbaff104c4e9
status: test
description: Detects execution of the "esxcli" command with the "system" flag in order to retrieve information about the different component of the system. Such as accounts, modules, NTP, etc.
references:
    - https://www.crowdstrike.com/blog/hypervisor-jackpotting-ecrime-actors-increase-targeting-of-esxi-servers/
    - https://developer.broadcom.com/xapis/esxcli-command-reference/7.0.0/namespace/esxcli_system.html
author: Cedric Maurugeon
date: 2023-09-04
tags:
    - attack.discovery
    - attack.execution
    - attack.t1033
    - attack.t1007
    - attack.t1059.012
logsource:
    category: process_creation
    product: linux
detection:
    selection_img:
        Image|endswith: '/esxcli'
        CommandLine|contains: 'system'
    selection_cli:
        CommandLine|contains:
            - ' get'
            - ' list'
    condition: all of selection_*
falsepositives:
    - Legitimate administration activities
level: medium