Ubiquiti - connection to non-corporate DNS server
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 |
let corp_dns = dynamic(['127.0.0.2']);
UbiquitiAuditEvent
| where DstPortNumber == '53'
| where DstIpAddr !in (corp_dns)
| extend IPCustomEntity = SrcIpAddr
id: fe232837-9bdc-4e2b-8c08-cdac2610eed3
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Ubiquiti UniFi/Analytic Rules/UbiquitiNonCorpDns.yaml
requiredDataConnectors:
- dataTypes:
- Ubiquiti_CL
connectorId: CustomLogsAma
description: |
'Detects connections to non-corporate DNS servers.'
severity: Medium
queryPeriod: 1h
kind: Scheduled
tactics:
- CommandAndControl
- Exfiltration
queryFrequency: 1h
query: |
let corp_dns = dynamic(['127.0.0.2']);
UbiquitiAuditEvent
| where DstPortNumber == '53'
| where DstIpAddr !in (corp_dns)
| extend IPCustomEntity = SrcIpAddr
version: 1.0.2
triggerThreshold: 0
name: Ubiquiti - connection to non-corporate DNS server
entityMappings:
- entityType: IP
fieldMappings:
- columnName: IPCustomEntity
identifier: Address
status: Available
relevantTechniques:
- T1572
- T1041
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"apiVersion": "2024-01-01-preview",
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/fe232837-9bdc-4e2b-8c08-cdac2610eed3')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/fe232837-9bdc-4e2b-8c08-cdac2610eed3')]",
"properties": {
"alertRuleTemplateName": "fe232837-9bdc-4e2b-8c08-cdac2610eed3",
"customDetails": null,
"description": "'Detects connections to non-corporate DNS servers.'\n",
"displayName": "Ubiquiti - connection to non-corporate DNS 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/UbiquitiNonCorpDns.yaml",
"query": "let corp_dns = dynamic(['127.0.0.2']);\nUbiquitiAuditEvent\n| where DstPortNumber == '53'\n| where DstIpAddr !in (corp_dns)\n| extend IPCustomEntity = SrcIpAddr\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CommandAndControl",
"Exfiltration"
],
"techniques": [
"T1041",
"T1572"
],
"templateVersion": "1.0.2",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}