{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/ffcd575b-3d54-482a-a6d8-d0de13b6ac63')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/ffcd575b-3d54-482a-a6d8-d0de13b6ac63')]",
      "properties": {
        "alertRuleTemplateName": "ffcd575b-3d54-482a-a6d8-d0de13b6ac63",
        "customDetails": null,
        "description": "'Identifies a match in CommonSecurityLog table from any Email IOC from TI'\n",
        "displayName": "TI map Email entity to PaloAlto CommonSecurityLog",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "DestinationUserID",
                "identifier": "Name"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SourceIP",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "Url",
                "identifier": "Url"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat%20Intelligence/Analytic%20Rules/EmailEntity_PaloAlto.yaml",
        "query": "let dt_lookBack = 1h;\nlet ioc_lookBack = 14d;\nlet emailregex = @'^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\\.[a-zA-Z0-9-.]+$';\nThreatIntelligenceIndicator\n//Filtering the table for Email related IOCs\n| where isnotempty(EmailSenderAddress)\n| where TimeGenerated >= ago(ioc_lookBack)\n| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId\n| where Active == true and ExpirationDateTime > now()\n// using innerunique to keep perf fast and result set low, we only need one match to indicate potential malicious activity that needs to be investigated\n| join kind=innerunique (\n    CommonSecurityLog | where TimeGenerated >= ago(dt_lookBack) and isnotempty(DestinationUserID)\n    // Filtering PAN Logs for specific event type to match relevant email entities\n    | where DeviceVendor == \"Palo Alto Networks\" and  DeviceEventClassID == \"wildfire\" and ApplicationProtocol in (\"smtp\",\"pop3\")\n    | extend DestinationUserID = tolower(DestinationUserID)\n    | where DestinationUserID matches regex emailregex\n    | extend CommonSecurityLog_TimeGenerated = TimeGenerated\n)\non $left.EmailSenderAddress == $right.DestinationUserID\n| where CommonSecurityLog_TimeGenerated < ExpirationDateTime\n| summarize CommonSecurityLog_TimeGenerated = arg_max(CommonSecurityLog_TimeGenerated, *) by IndicatorId, DestinationUserID\n| project CommonSecurityLog_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore, EmailSenderName, EmailRecipient,\nEmailSourceDomain, EmailSourceIpAddress, EmailSubject, FileHashValue, FileHashType, DestinationUserID, DeviceEventClassID, LogSeverity, DeviceAction, SourceIP, SourcePort,\nDestinationIP, DestinationPort, Protocol, ApplicationProtocol\n| extend timestamp = CommonSecurityLog_TimeGenerated\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1566"
        ],
        "templateVersion": "1.2.6",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}