Enable Remote Connection Between Anonymous Computer - AllowAnonymousCallback — Sigma Rule

Rule metadata and linked tags

Author: X__Junior (Nextron Systems). Source status: test; severity: medium. Source dates: 2023-11-03 / not supplied.

{
  "product": "windows",
  "category": "registry_set"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 94c0228bb7dd1a1311499d33d8f43bf45a05d3743d7101e6fc367c1f1d3ddedc

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: Enable Remote Connection Between Anonymous Computer - AllowAnonymousCallback
id: 4d431012-2ab5-4db7-a84e-b29809da2172
status: test
description: Detects enabling of the "AllowAnonymousCallback" registry value, which allows a remote connection between computers that do not have a trust relationship.
references:
    - https://learn.microsoft.com/en-us/windows/win32/wmisdk/connecting-to-wmi-remotely-starting-with-vista
author: X__Junior (Nextron Systems)
date: 2023-11-03
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    product: windows
    category: registry_set
detection:
    selection:
        TargetObject|contains: '\Microsoft\WBEM\CIMOM\AllowAnonymousCallback'
        Details: 'DWORD (0x00000001)'
    condition: selection
falsepositives:
    - Administrative activity
level: medium

Original YAML and metadata in JSON

False positives

• Administrative activity

Source references

• https://learn.microsoft.com/en-us/windows/win32/wmisdk/connecting-to-wmi-remotely-starting-with-vista