let threshold = 5;
CiscoWSAEvent
| where UrlOriginal matches regex @'\Ahttp(s)?[:][/][/]\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}'
| extend URLCustomEntity = UrlOriginal, AccountCustomEntity = SrcUserName
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAUnexpectedUrl.yaml
entityMappings:
- fieldMappings:
- identifier: Url
columnName: URLCustomEntity
entityType: URL
- fieldMappings:
- identifier: Name
columnName: AccountCustomEntity
entityType: Account
kind: Scheduled
query: |
let threshold = 5;
CiscoWSAEvent
| where UrlOriginal matches regex @'\Ahttp(s)?[:][/][/]\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}'
| extend URLCustomEntity = UrlOriginal, AccountCustomEntity = SrcUserName
triggerOperator: gt
version: 1.0.0
queryPeriod: 1h
name: Cisco WSA - Unexpected URL
severity: Medium
relevantTechniques:
- T1102
requiredDataConnectors:
- dataTypes:
- CiscoWSAEvent
connectorId: CiscoWSA
triggerThreshold: 0
tactics:
- CommandAndControl
queryFrequency: 1h
id: 010644fd-2830-4451-9e0e-606cc192f2e7
status: Available
description: |
'Detects unexpected URL.'
{
"$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/010644fd-2830-4451-9e0e-606cc192f2e7')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/010644fd-2830-4451-9e0e-606cc192f2e7')]",
"properties": {
"alertRuleTemplateName": "010644fd-2830-4451-9e0e-606cc192f2e7",
"customDetails": null,
"description": "'Detects unexpected URL.'\n",
"displayName": "Cisco WSA - Unexpected URL",
"enabled": true,
"entityMappings": [
{
"entityType": "URL",
"fieldMappings": [
{
"columnName": "URLCustomEntity",
"identifier": "Url"
}
]
},
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "AccountCustomEntity",
"identifier": "Name"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAUnexpectedUrl.yaml",
"query": "let threshold = 5;\nCiscoWSAEvent\n| where UrlOriginal matches regex @'\\Ahttp(s)?[:][/][/]\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}'\n| extend URLCustomEntity = UrlOriginal, AccountCustomEntity = SrcUserName\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Medium",
"status": "Available",
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CommandAndControl"
],
"techniques": [
"T1102"
],
"templateVersion": "1.0.0",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}