Ubiquiti - SSH from external source

UbiquitiAuditEvent
| where EventCategory =~ 'firewall'
| where ipv4_is_private(SrcIpAddr) == 'False'
| where ipv4_is_private(DstIpAddr)
| where DstPortNumber == '22'
| extend IPCustomEntity = DstIpAddr

triggerOperator: gt
queryFrequency: 1h
description: |
    'Detects remote to local (R2L) SSH connection to internal host.'
status: Available
kind: Scheduled
triggerThreshold: 0
requiredDataConnectors:
- connectorId: UbiquitiUnifi
  dataTypes:
  - UbiquitiAuditEvent
version: 1.0.0
queryPeriod: 1h
name: Ubiquiti - SSH from external source
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Ubiquiti UniFi/Analytic Rules/UbiquitiR2LSSH.yaml
id: 0998a19d-8451-4cdd-8493-fc342816a197
tactics:
- InitialAccess
relevantTechniques:
- T1133
severity: Medium
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
query: |
  UbiquitiAuditEvent
  | where EventCategory =~ 'firewall'
  | where ipv4_is_private(SrcIpAddr) == 'False'
  | where ipv4_is_private(DstIpAddr)
  | where DstPortNumber == '22'
  | extend IPCustomEntity = DstIpAddr  

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/0998a19d-8451-4cdd-8493-fc342816a197')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/0998a19d-8451-4cdd-8493-fc342816a197')]",
      "properties": {
        "alertRuleTemplateName": "0998a19d-8451-4cdd-8493-fc342816a197",
        "customDetails": null,
        "description": "'Detects remote to local (R2L) SSH connection to internal host.'\n",
        "displayName": "Ubiquiti - SSH from external source",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Ubiquiti UniFi/Analytic Rules/UbiquitiR2LSSH.yaml",
        "query": "UbiquitiAuditEvent\n| where EventCategory =~ 'firewall'\n| where ipv4_is_private(SrcIpAddr) == 'False'\n| where ipv4_is_private(DstIpAddr)\n| where DstPortNumber == '22'\n| extend IPCustomEntity = DstIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1133"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}