Microsoft Sentinel Analytic Rules
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Cisco Umbrella - Connection to non-corporate private network

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Idc9b6d281-b96b-4763-b728-9a04b9fe1246
RulenameCisco Umbrella - Connection to non-corporate private network
DescriptionIP addresses of broadband links that usually indicates users attempting to access their home network, for example for a remote session to a home computer.
SeverityMedium
TacticsCommandAndControl
Exfiltration
Required data connectorsCiscoUmbrellaDataConnector
KindScheduled
Query frequency10m
Query period10m
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Detections/CiscoUmbrella/CiscoUmbrellaConnectionNon-CorporatePrivateNetwork.yaml
Version1.1.1
Arm templatec9b6d281-b96b-4763-b728-9a04b9fe1246.json
Deploy To Azure
let lbtime = 10m;
Cisco_Umbrella
| where TimeGenerated > ago(lbtime)
| where EventType == 'proxylogs'
| where DvcAction =~ 'Allowed'
| where UrlCategory has_any ('Dynamic and Residential', 'Personal VPN')
| project TimeGenerated, SrcIpAddr, Identities
kind: Scheduled
triggerThreshold: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/CiscoUmbrella/CiscoUmbrellaConnectionNon-CorporatePrivateNetwork.yaml
requiredDataConnectors:
- dataTypes:
  - Cisco_Umbrella_proxy_CL
  connectorId: CiscoUmbrellaDataConnector
queryPeriod: 10m
tactics:
- CommandAndControl
- Exfiltration
severity: Medium
triggerOperator: gt
description: |
    'IP addresses of broadband links that usually indicates users attempting to access their home network, for example for a remote session to a home computer.'
query: |
  let lbtime = 10m;
  Cisco_Umbrella
  | where TimeGenerated > ago(lbtime)
  | where EventType == 'proxylogs'
  | where DvcAction =~ 'Allowed'
  | where UrlCategory has_any ('Dynamic and Residential', 'Personal VPN')
  | project TimeGenerated, SrcIpAddr, Identities  
name: Cisco Umbrella - Connection to non-corporate private network
version: 1.1.1
id: c9b6d281-b96b-4763-b728-9a04b9fe1246
queryFrequency: 10m
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: Identities
    identifier: FullName
- entityType: IP
  fieldMappings:
  - columnName: SrcIpAddr
    identifier: Address
{
  "$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/c9b6d281-b96b-4763-b728-9a04b9fe1246')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/c9b6d281-b96b-4763-b728-9a04b9fe1246')]",
      "properties": {
        "alertRuleTemplateName": "c9b6d281-b96b-4763-b728-9a04b9fe1246",
        "customDetails": null,
        "description": "'IP addresses of broadband links that usually indicates users attempting to access their home network, for example for a remote session to a home computer.'\n",
        "displayName": "Cisco Umbrella - Connection to non-corporate private network",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Identities",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SrcIpAddr",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/CiscoUmbrella/CiscoUmbrellaConnectionNon-CorporatePrivateNetwork.yaml",
        "query": "let lbtime = 10m;\nCisco_Umbrella\n| where TimeGenerated > ago(lbtime)\n| where EventType == 'proxylogs'\n| where DvcAction =~ 'Allowed'\n| where UrlCategory has_any ('Dynamic and Residential', 'Personal VPN')\n| project TimeGenerated, SrcIpAddr, Identities\n",
        "queryFrequency": "PT10M",
        "queryPeriod": "PT10M",
        "severity": "Medium",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl",
          "Exfiltration"
        ],
        "templateVersion": "1.1.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}