Cisco Umbrella - Connection to non-corporate private network
Id | c9b6d281-b96b-4763-b728-9a04b9fe1246 |
Rulename | Cisco Umbrella - Connection to non-corporate private network |
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. |
Severity | Medium |
Tactics | CommandAndControl Exfiltration |
Required data connectors | CiscoUmbrellaDataConnector |
Kind | Scheduled |
Query frequency | 10m |
Query period | 10m |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Detections/CiscoUmbrella/CiscoUmbrellaConnectionNon-CorporatePrivateNetwork.yaml |
Version | 1.1.1 |
Arm template | c9b6d281-b96b-4763-b728-9a04b9fe1246.json |
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
id: c9b6d281-b96b-4763-b728-9a04b9fe1246
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/CiscoUmbrella/CiscoUmbrellaConnectionNon-CorporatePrivateNetwork.yaml
requiredDataConnectors:
- dataTypes:
- Cisco_Umbrella_proxy_CL
connectorId: CiscoUmbrellaDataConnector
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.'
severity: Medium
queryPeriod: 10m
kind: Scheduled
tactics:
- CommandAndControl
- Exfiltration
queryFrequency: 10m
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
version: 1.1.1
triggerThreshold: 0
entityMappings:
- entityType: Account
fieldMappings:
- columnName: Identities
identifier: FullName
- entityType: IP
fieldMappings:
- columnName: SrcIpAddr
identifier: Address
name: Cisco Umbrella - Connection to non-corporate private network
{
"$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/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",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CommandAndControl",
"Exfiltration"
],
"templateVersion": "1.1.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}