
title: Enumeration via the Global Catalog
author: Chakib Gzenayi (@Chak092), Hosni Mribah
date: 2020/05/11
description: Detects enumeration of the global catalog (that can be performed using
  BloodHound or others AD reconnaissance tools). Adjust Threshold according to domain
  width.
detection:
  SELECTION_1:
    EventID: 5156
  SELECTION_2:
    DestinationPort: 3268
  SELECTION_3:
    DestinationPort: 3269
  condition: (SELECTION_1 and (SELECTION_2 or SELECTION_3)) | count() by SourceAddress
    > 2000
falsepositives:
- Exclude known DCs.
id: 619b020f-0fd7-4f23-87db-3f51ef837a34
level: medium
logsource:
  definition: The advanced audit policy setting "Windows Filtering Platform > Filtering
    Platform Connection" must be configured for Success
  product: windows
  service: security
modified: 2021/06/01
references:
- https://docs.microsoft.com/en-us/windows/security/threat-protection/auditing/event-5156
status: experimental
tags:
- attack.discovery
- attack.t1087
- attack.t1087.002
ruletype: SIGMA
