Ubiquiti - connection to non-corporate DNS server

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Id	fe232837-9bdc-4e2b-8c08-cdac2610eed3
Rulename	Ubiquiti - connection to non-corporate DNS server
Description	Detects connections to non-corporate DNS servers.
Severity	Medium
Tactics	CommandAndControl Exfiltration
Techniques	T1572 T1041
Required data connectors	CustomLogsAma
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Ubiquiti UniFi/Analytic Rules/UbiquitiNonCorpDns.yaml
Version	1.0.2
Arm template	fe232837-9bdc-4e2b-8c08-cdac2610eed3.json

KQL

let corp_dns = dynamic(['127.0.0.2']);
UbiquitiAuditEvent
| where DstPortNumber == '53'
| where DstIpAddr !in (corp_dns)
| extend IPCustomEntity = SrcIpAddr

YAML

name: Ubiquiti - connection to non-corporate DNS server
id: fe232837-9bdc-4e2b-8c08-cdac2610eed3
description: |
    'Detects connections to non-corporate DNS servers.'
triggerThreshold: 0
entityMappings:
- fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
  entityType: IP
version: 1.0.2
triggerOperator: gt
query: |
  let corp_dns = dynamic(['127.0.0.2']);
  UbiquitiAuditEvent
  | where DstPortNumber == '53'
  | where DstIpAddr !in (corp_dns)
  | extend IPCustomEntity = SrcIpAddr  
tactics:
- CommandAndControl
- Exfiltration
kind: Scheduled
queryFrequency: 1h
severity: Medium
queryPeriod: 1h
requiredDataConnectors:
- dataTypes:
  - Ubiquiti_CL
  connectorId: CustomLogsAma
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Ubiquiti UniFi/Analytic Rules/UbiquitiNonCorpDns.yaml
relevantTechniques:
- T1572
- T1041

ARM