<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Security\MicrosoftGraphSecurityRunHuntingQuery\RunHuntingQueryPostRequestBody;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new RunHuntingQueryPostRequestBody();
$requestBody->setQuery('DeviceProcessEvents | where InitiatingProcessFileName =~ \"powershell.exe\" | project Timestamp, FileName, InitiatingProcessFileName | order by Timestamp desc | limit 2');
$result = $graphServiceClient->security()->microsoftGraphSecurityRunHuntingQuery()->post($requestBody)->wait();