Scripting Azure VM build tasks: static IP addresses, BGInfo and anti-malware extensions

Following on from yesterday’s blog post with a pile of PowerShell to build a multiple-NIC VM in Azure, here are some more snippets of PowerShell to carry out a few build-related activities.

Setting a static IP address on a NIC

$RGName = Read-Host "Resource Group"
$VNICName = Read-Host "vNIC Name"
$VNIC=Get-AzureRmNetworkInterface -Name $VNICName -ResourceGroupName $RGName
$VNIC.IpConfigurations[0].PrivateIpAllocationMethod = "Static"
Set-AzureRmNetworkInterface -NetworkInterface $VNIC

Installing BGInfo

$RGName = Read-Host "Resource Group"
$VMName = Read-Host "Virtual Machine Name"
$Location = Read-Host "Region/Location"
Set-AzureRmVMExtension -ExtensionName BGInfo -Publisher Microsoft.Compute -Version 2.1 -ExtensionType BGInfo -Location $Location -ResourceGroupName $RGName -VMName $VMName

Installing Microsoft Antimalware

This one is a little more difficult – the script is a development of Mitesh Chauhan’s work entitled Installing Microsoft Anti Virus Extension to Azure Resource Manager VM using Set-AzureRmVMExtension

It’s worth reading Mitesh’s post for more background on the Microsoft Anti Virus Extension (IaaS Antimalware) and also taking a look at the Security Health in the Azure Portal (currently in preview), which will highlight VMs that have no protection (amongst other things).

Mitesh’s script uses a simple settings string, or for more complex configuration, it reads from a file. I tried to use a more complex setting and it just resulted in PowerShell errors, suggesting this wasn’t proper JSON (it isn’t):

$AntiMalwareSettings = @{
"AntimalwareEnabled" = $true;
"RealtimeProtectionEnabled" = $true;
"ScheduledScanSettings" = @{
"isEnabled" = $true;
"day" = 1;
"time" = 180;
"scanType" = "Full"
};
"Exclusions" = @{
"Extensions" = ".mdf;.ldf;.ndf;.bak;.trn;";
"Paths" = "D:\\Logs;E:\\Databases;C:\\Program Files\\Microsoft SQL Server\\MSSQL\\FTDATA";
"Processes" = "SQLServr.exe;ReportingServicesService.exe;MSMDSrv.exe"
}
}

Set-AzureRmVMExtension : Error reading JObject from JsonReader. Current JsonReader item is not an object: Null. Path”, line 1, position 4.

If I use the JSON form it’s no better:

$AntiMalwareSettings = {
"AntimalwareEnabled": true,
"RealtimeProtectionEnabled": true,
"ScheduledScanSettings": {
"isEnabled": true,
"day": 1,
"time": 180,
"scanType": "Full"
},
"Exclusions": {
"Extensions": ".mdf;.ldf;.ndf;.bak;.trn",
"Paths": "D:\\Logs;E:\\Databases;C:\\Program Files\\Microsoft SQL Server\\MSSQL\\FTDATA",
"Processes": "SQLServr.exe;ReportingServicesService.exe;MSMDSrv.exe"
}
}

Set-AzureRmVMExtension : Unexpected character encountered while parsing value: S. Path ”, line 0, position 0.

So the actual script I used is below:

# Install Microsoft AntiMalware client on an ARM based Azure VM
# Check note at the end to be able to open up the SCEP antimalware console on the server if there are problems.
# Author – Mitesh Chauhan – miteshc.wordpress.com (updated by Mark Wilson - markwilson.co.uk)
# For Powershell 1.0.1 and above
# See https://miteshc.wordpress.com/2016/02/18/msav-extension-on-azurearm-vm/

# Log in with credentials for subscription
# Login-AzureRmAccount

# Select your subscription if required (or default will be used)
# Select-AzureRmSubscription -SubscriptionId "Your Sub ID here"

$RGName = Read-Host "Resource Group"
$VMName = Read-Host "Virtual Machine Name"
$Location = Read-Host "Region/Location"

# Use this (-SettingString) for simple setup
# $AntiMalwareSettings = ‘{ "AntimalwareEnabled": true,"RealtimeProtectionEnabled": true}’;

# Use this (-SettingString) to configure from JSON file
$AntiMalwareSettings = Get-Content ‘.\MSAVConfig.json’ -Raw

$allVersions= (Get-AzureRmVMExtensionImage -Location $location -PublisherName "Microsoft.Azure.Security" -Type "IaaSAntimalware").Version
$typeHandlerVer = $allVersions[($allVersions.count)–1]
$typeHandlerVerMjandMn = $typeHandlerVer.split(".")
$typeHandlerVerMjandMn = $typeHandlerVerMjandMn[0] + "." + $typeHandlerVerMjandMn[1]

Write-Host "Installing Microsoft AntiMalware version" $typeHandlerVerMjandMn "to" $vmName "in" $RGName "("$location ")"
Write-Host "Configuration:"
$AntiMalwareSettings

# Specify for -SettingString parameter here which option you want, simple $settingsstring or $MSAVConfigfile to sue json file.
Set-AzureRmVMExtension -ResourceGroupName $RGName -VMName $vmName -Name "IaaSAntimalware" -Publisher "Microsoft.Azure.Security" -ExtensionType "IaaSAntimalware" -TypeHandlerVersion $typeHandlerVerMjandMn -SettingString $AntiMalwareSettings -Location $location

# To remove the AntiMalware extension
# Remove-AzureRmVMExtension -ResourceGroupName $resourceGroupName -VMName $vmName -Name "IaaSAntimalware"

# If you have error saying Admin has restricted this app, Navigate to “C:\Program Files\Microsoft Security Client”
# Run "C:\Program Files\Microsoft Security Client\ConfigSecurityPolicy.exe cleanuppolicy.xml"
# Or simply drag the cleanuppolicy.xml file above onto the ConfigSecurityPolicy.exe to sort it and you should be in.

The MSAVconfig.json file contains the JSON version of the Anti-Malware settings:

{
"AntimalwareEnabled": true,
"RealtimeProtectionEnabled": true,
"ScheduledScanSettings": {
"isEnabled": true,
"day": 1,
"time": 180,
"scanType": "Full"
},
"Exclusions": {
"Extensions": ".mdf;.ldf;.ndf;.bak;.trn",
"Paths": "D:\\Logs;E:\\Databases;C:\\Program Files\\Microsoft SQL Server\\MSSQL\\FTDATA",
"Processes": "SQLServr.exe;ReportingServicesService.exe;MSMDSrv.exe"
}
}

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