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Policy Rule
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{
"properties": {
"displayName": "Deploy export to Event Hub for Azure Security Center alerts and recommendations",
"policyType": "BuiltIn",
"mode": "All",
"description": "Enable export to Event Hub of Azure Security Center alerts and/or recommendations. This policy deploys an export to Event Hub configuration with your conditions and target Event Hub on the assigned scope. To deploy this policy on newly created subscriptions, open the Compliance tab, select the relevant non-compliant assignment and create a remediation task.",
"metadata": {
"version": "1.0.0",
"category": "Security Center"
},
"parameters": {
"resourceGroupName": {
"type": "String",
"metadata": {
"displayName": "Resource group name",
"description": "The resource group name where the export to Event Hub configuration is created. If you enter a name for a resource group that doesn't exist, it'll be created in the subscription. Note that each resource group can only have one export to Event Hub configured."
}
},
"resourceGroupLocation": {
"type": "String",
"metadata": {
"displayName": "Resource group location",
"description": "The location where the resource group and the export to Event Hub configuration are created.",
"strongType": "location"
}
},
"exportedDataTypes": {
"type": "Array",
"metadata": {
"displayName": "Exported data types",
"description": "The data types to be exported. Example: Security recommendations;Security alerts;"
},
"allowedValues": [
"Security recommendations",
"Security alerts"
],
"defaultValue": [
"Security recommendations",
"Security alerts"
]
},
"recommendationNames": {
"type": "Array",
"metadata": {
"displayName": "Recommendation IDs",
"description": "Applicable only for export of security recommendations. To export all recommendations, leave this empty. To export specific recommendations, enter a list of recommendation IDs separated by semicolons (';'). Recommendation IDs are available through the Assessments API (https://docs.microsoft.com/rest/api/securitycenter/assessments), or Azure Resource Graph Explorer (https://portal.azure.com/#blade/HubsExtension/ArgQueryBlade), choose securityresources and microsoft.security/assessments."
},
"defaultValue": [
]
},
"recommendationSeverities": {
"type": "Array",
"metadata": {
"displayName": "Recommendation severities",
"description": "Applicable only for export of security recommendations. Determines recommendation severities. Example: High;Medium;Low;"
},
"allowedValues": [
"High",
"Medium",
"Low"
],
"defaultValue": [
"High",
"Medium",
"Low"
]
},
"alertSeverities": {
"type": "Array",
"metadata": {
"displayName": "Alert severities",
"description": "Applicable only for export of security alerts. Determines alert severities. Example: High;Medium;Low;"
},
"allowedValues": [
"High",
"Medium",
"Low"
],
"defaultValue": [
"High",
"Medium",
"Low"
]
},
"eventHubDetails": {
"type": "String",
"metadata": {
"displayName": "Event Hub details",
"description": "The Event Hub details of where the data should be exported to: Subscription, Event Hub Namespace, Event Hub, and Authorizations rules with 'Send' claim. If you do not already have an event hub, visit Event Hubs to create one (https://portal.azure.com/#blade/HubsExtension/BrowseResource/resourceType/Microsoft.EventHub%2Fnamespaces).",
"strongType": "Microsoft.EventHub/namespaces/eventhubs/authorizationrules",
"assignPermissions": true
}
}
},
"policyRule": {
"if": {
"field": "type",
"equals": "Microsoft.Resources/subscriptions"
},
"then": {
"effect": "deployIfNotExists",
"details": {
"type": "Microsoft.Security/automations",
"name": "exportToEventHub",
"existenceScope": "resourcegroup",
"ResourceGroupName": "[parameters('resourceGroupName')]",
"deploymentScope": "subscription",
"roleDefinitionIds": [
"/providers/microsoft.authorization/roleDefinitions/b24988ac-6180-42a0-ab88-20f7382dd24c"
],
"deployment": {
"location": "westeurope",
"properties": {
"mode": "incremental",
"template": {
"$schema": "https://schema.management.azure.com/schemas/2018-05-01/subscriptionDeploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"resourceGroupName": {
"type": "string"
},
"resourceGroupLocation": {
"type": "string"
},
"exportedDataTypes": {
"type": "array"
},
"recommendationNames": {
"type": "array"
},
"recommendationSeverities": {
"type": "array"
},
"alertSeverities": {
"type": "array"
},
"eventHubDetails": {
"type": "string"
},
"guidValue": {
"type": "string",
"defaultValue": "[newGuid()]"
}
},
"variables": {
"scopeDescription": "scope for subscription {0}",
"recommendationNamesLength": "[length(parameters('recommendationNames'))]",
"recommendationSeveritiesLength": "[length(parameters('recommendationSeverities'))]",
"alertSeveritiesLength": "[length(parameters('alertSeverities'))]",
"recommendationNamesLengthIfEmpty": "[if(equals(variables('recommendationNamesLength'), 0), 1, variables('recommendationNamesLength'))]",
"recommendationSeveritiesLengthIfEmpty": "[if(equals(variables('recommendationSeveritiesLength'), 0), 1, variables('recommendationSeveritiesLength'))]",
"alertSeveritiesLengthIfEmpty": "[if(equals(variables('alertSeveritiesLength'), 0), 1, variables('alertSeveritiesLength'))]",
"totalRuleCombinationsForOneRecommendationName": "[variables('recommendationSeveritiesLengthIfEmpty')]",
"totalRuleCombinationsForOneRecommendationSeverity": 1,
"exportedDataTypesLength": "[length(parameters('exportedDataTypes'))]",
"exportedDataTypesLengthIfEmpty": "[if(equals(variables('exportedDataTypesLength'), 0), 1, variables('exportedDataTypesLength'))]",
"SeperatedEventHubDetails": "[split(parameters('eventHubDetails'),'/')]",
"dataTypeMap": {
"Security recommendations": "Assessments",
"Security alerts": "Alerts"
},
"alertSeverityMap": {
"High": "high",
"Medium": "medium",
"Low": "low"
},
"ruleSetsForAssessmentsObj": {
"copy": [
{
"name": "ruleSetsForAssessmentsArr",
"count": "[mul(variables('recommendationNamesLengthIfEmpty'),variables('recommendationSeveritiesLengthIfEmpty'))]",
"input": {
"rules": [
{
"propertyJPath": "[if(equals(variables('recommendationNamesLength'),0),'type','name')]",
"propertyType": "string",
"expectedValue": "[if(equals(variables('recommendationNamesLength'),0),'Microsoft.Security/assessments',parameters('recommendationNames')[mod(div(copyIndex('ruleSetsForAssessmentsArr'),variables('totalRuleCombinationsForOneRecommendationName')),variables('recommendationNamesLength'))])]",
"operator": "Contains"
},
{
"propertyJPath": "properties.metadata.severity",
"propertyType": "string",
"expectedValue": "[parameters('recommendationSeverities')[mod(div(copyIndex('ruleSetsForAssessmentsArr'),variables('totalRuleCombinationsForOneRecommendationSeverity')),variables('recommendationSeveritiesLength'))]]",
"operator": "Equals"
}
]
}
}
]
},
"ruleSetsForAlertsObj": {
"copy": [
{
"name": "ruleSetsForAlertsArr",
"count": "[variables('alertSeveritiesLengthIfEmpty')]",
"input": {
"rules": [
{
"propertyJPath": "Severity",
"propertyType": "string",
"expectedValue": "[variables('alertSeverityMap')[parameters('alertSeverities')[mod(copyIndex('ruleSetsForAlertsArr'),variables('alertSeveritiesLengthIfEmpty'))]]]",
"operator": "Equals"
}
]
}
}
]
}
},
"resources": [
{
"name": "[parameters('resourceGroupName')]",
"type": "Microsoft.Resources/resourceGroups",
"apiVersion": "2019-10-01",
"location": "[parameters('resourceGroupLocation')]",
"tags": {
},
"properties": {
}
},
{
"type": "Microsoft.Resources/deployments",
"apiVersion": "2019-10-01",
"name": "[concat('nestedAutomationDeployment', '_', parameters('guidValue'))]",
"resourceGroup": "[parameters('resourceGroupName')]",
"dependsOn": [
"[resourceId('Microsoft.Resources/resourceGroups/', parameters('resourceGroupName'))]"
],
"properties": {
"mode": "Incremental",
"template": {
"$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
},
"variables": {
},
"resources": [
{
"tags": {
},
"apiVersion": "2019-01-01-preview",
"location": "[parameters('resourceGroupLocation')]",
"name": "exportToEventHub",
"type": "Microsoft.Security/automations",
"dependsOn": [
],
"properties": {
"description": "Export Azure Security Center alerts and/or recommendations to Event Hub via policy",
"isEnabled": true,
"scopes": [
{
"description": "[replace(variables('scopeDescription'),'{0}', subscription().subscriptionId)]",
"scopePath": "[subscription().id]"
}
],
"copy": [
{
"name": "sources",
"count": "[variables('exportedDataTypesLengthIfEmpty')]",
"input": {
"eventSource": "[variables('dataTypeMap')[parameters('exportedDataTypes')[copyIndex('sources')]]]",
"ruleSets": "[if(equals(parameters('exportedDataTypes')[copyIndex('sources')], 'Security recommendations'), variables('ruleSetsForAssessmentsObj').ruleSetsForAssessmentsArr, variables('ruleSetsForAlertsObj').ruleSetsForAlertsArr)]"
}
}
],
"actions": [
{
"actionType": "EventHub",
"eventHubResourceId": "[concat('/', variables('SeperatedEventHubDetails')[1], '/', variables('SeperatedEventHubDetails')[2], '/', variables('SeperatedEventHubDetails')[3], '/', variables('SeperatedEventHubDetails')[4], '/', variables('SeperatedEventHubDetails')[5], '/', variables('SeperatedEventHubDetails')[6], '/', variables('SeperatedEventHubDetails')[7], '/', variables('SeperatedEventHubDetails')[8], '/', variables('SeperatedEventHubDetails')[9], '/', variables('SeperatedEventHubDetails')[10])]",
"connectionString": "[listkeys(parameters('eventHubDetails'),'2017-04-01').primaryConnectionString]"
}
]
}
}
]
}
}
}
]
},
"parameters": {
"resourceGroupName": {
"value": "[parameters('resourceGroupName')]"
},
"resourceGroupLocation": {
"value": "[parameters('resourceGroupLocation')]"
},
"exportedDataTypes": {
"value": "[parameters('exportedDataTypes')]"
},
"recommendationNames": {
"value": "[parameters('recommendationNames')]"
},
"recommendationSeverities": {
"value": "[parameters('recommendationSeverities')]"
},
"alertSeverities": {
"value": "[parameters('alertSeverities')]"
},
"eventHubDetails": {
"value": "[parameters('eventHubDetails')]"
}
}
}
}
}
}
}
},
"id": "/providers/Microsoft.Authorization/policyDefinitions/cdfcce10-4578-4ecd-9703-530938e4abcb",
"type": "Microsoft.Authorization/policyDefinitions",
"name": "cdfcce10-4578-4ecd-9703-530938e4abcb"
}
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