let allowed_ftp = dynamic(['127.0.0.2']);
UbiquitiAuditEvent
| where EventCategory == 'firewall'
| where ipv4_is_private(SrcIpAddr)
| where ipv4_is_private(DstIpAddr) == 'False'
| where DstPortNumber in ('20', '21')
| where DstIpAddr !in (allowed_ftp)
| extend IPCustomEntity = SrcIpAddr
requiredDataConnectors:
- connectorId: UbiquitiUnifi
dataTypes:
- UbiquitiAuditEvent
triggerOperator: gt
version: 1.0.0
status: Available
queryPeriod: 1h
severity: Medium
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Ubiquiti UniFi/Analytic Rules/UbiquitiL2RFTP.yaml
tactics:
- Exfiltration
kind: Scheduled
queryFrequency: 1h
description: |
'Detects local to remote (L2R) FTP connections.'
query: |
let allowed_ftp = dynamic(['127.0.0.2']);
UbiquitiAuditEvent
| where EventCategory == 'firewall'
| where ipv4_is_private(SrcIpAddr)
| where ipv4_is_private(DstIpAddr) == 'False'
| where DstPortNumber in ('20', '21')
| where DstIpAddr !in (allowed_ftp)
| extend IPCustomEntity = SrcIpAddr
id: fd200125-9d57-4838-85ca-6430c63e4e5d
triggerThreshold: 0
entityMappings:
- fieldMappings:
- identifier: Address
columnName: IPCustomEntity
entityType: IP
name: Ubiquiti - Unusual FTP connection to external server
{
"$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/fd200125-9d57-4838-85ca-6430c63e4e5d')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/fd200125-9d57-4838-85ca-6430c63e4e5d')]",
"properties": {
"alertRuleTemplateName": "fd200125-9d57-4838-85ca-6430c63e4e5d",
"customDetails": null,
"description": "'Detects local to remote (L2R) FTP connections.'\n",
"displayName": "Ubiquiti - Unusual FTP connection to external server",
"enabled": true,
"entityMappings": [
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IPCustomEntity",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Ubiquiti UniFi/Analytic Rules/UbiquitiL2RFTP.yaml",
"query": "let allowed_ftp = dynamic(['127.0.0.2']);\nUbiquitiAuditEvent\n| where EventCategory == 'firewall'\n| where ipv4_is_private(SrcIpAddr)\n| where ipv4_is_private(DstIpAddr) == 'False'\n| where DstPortNumber in ('20', '21')\n| where DstIpAddr !in (allowed_ftp)\n| extend IPCustomEntity = SrcIpAddr\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Medium",
"status": "Available",
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Exfiltration"
],
"templateVersion": "1.0.0",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}