ScriptExtensionResource.json

{
    "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {},
    "variables": {},
    "resources": [
        {
            "type": "Microsoft.Compute/virtualMachines/extensions",
            "name": "myVirtualMachine/deployscript",
            "apiVersion": "2016-03-30",
            "location": "[resourceGroup().location]",
            "dependsOn": [
                "myVirtualMachine"
            ],
            "properties": {
                "publisher": "Microsoft.Compute",
                "type": "CustomScriptExtension",
                "typeHandlerVersion": "1.7",
                "autoUpgradeMinorVersion": true,
                "settings": {
                    "fileUris": [
                        "https://raw.githubusercontent.com/bobalob/ARM-Example/master/ProvisionVM.PS1"
                    ],
                    "commandToExecute": "powershell.exe -ExecutionPolicy Unrestricted -File ProvisionVM.PS1"
                }
            }
        }
    ],
    "outputs": {}
}