Sigma Rule Library

Potential Exploitation of CVE-2024-37085 - Suspicious ESX Admins Group Activity

Detects any creation or modification to a windows domain group with the name "ESX Admins". This could indicates a potential exploitation attempt of CVE-2024-37085, which allows an attacker to elevate their privileges to full administrative access on an domain-joined ESXi hypervisor. VMware ESXi hypervisors joined to an Active Directory domain consider any member of a domain group named "ESX Admins" to have full administrative access by default.

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Detection logic

selection

EventID:
  - 4727
  - 4728
  - 4731
  - 4737
  - 4754
  - 4755
  - 4756

keyword_group

- ESX Admins

Condition

selection and keyword_group

Raw YAML

title: Potential Exploitation of CVE-2024-37085 - Suspicious ESX Admins Group Activity
id: 47a1658b-67a4-48e2-8ab1-c10437fc0148
status: test
description: |
    Detects any creation or modification to a windows domain group with the name "ESX Admins".
    This could indicates a potential exploitation attempt of CVE-2024-37085, which allows an attacker to elevate their privileges to full administrative access on an domain-joined ESXi hypervisor.
    VMware ESXi hypervisors joined to an Active Directory domain consider any member of a domain group named "ESX Admins" to have full administrative access by default.
references:
    - https://www.microsoft.com/en-us/security/blog/2024/07/29/ransomware-operators-exploit-esxi-hypervisor-vulnerability-for-mass-encryption/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2024-07-30
tags:
    - attack.execution
    - cve.2024-37085
    - detection.emerging-threats
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID:
            - 4727
            - 4728
            - 4731
            - 4737
            - 4754
            - 4755
            - 4756
    keyword_group:
        - 'ESX Admins'
    condition: selection and keyword_group
falsepositives:
    - Unknown
level: high

False positives

  • Unknown

References

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