Remote File Download via PowerShell

sequence by process.entity_id with maxspan=30s
[network where host.os.type == "windows" and 
  process.name : ("powershell.exe", "pwsh.exe", "powershell_ise.exe") and
  network.protocol == "dns" and
  not dns.question.name : (
        "*.microsoft.com", "*.azureedge.net", "*.powershellgallery.com", "*.windowsupdate.com",
        "metadata.google.internal", "dist.nuget.org", "artifacts.elastic.co", "*.digicert.com",
        "*.chocolatey.org", "outlook.office365.com", "cdn.oneget.org", "ci.dot.net",
        "packages.icinga.com", "login.microsoftonline.com", "*.gov", "*.azure.com", "*.python.org",
        "dl.google.com", "sensor.cloud.tenable.com", "*.azurefd.net", "*.office.net", "*.anac*",
        "aka.ms", "dot.net", "*.visualstudio.com", "*.local") and
  not user.id == "S-1-5-18" and
  /* Filter out NetBIOS/LLMNR-style names (e.g. host, localhost, etc.) */
  dns.question.name regex """.*\.[a-zA-Z]{2,5}"""]
[file where host.os.type == "windows" and event.type == "creation" and
  process.name : ("powershell.exe", "pwsh.exe", "powershell_ise.exe") and 
  (file.extension : ("exe", "dll", "ps1", "bat", "cmd", "vbs", "vbe", "js", "jse", "wsh", "wsf", "sct", "hta", "cpl", "scr", "pif", "com") or file.Ext.header_bytes : "4d5a*") and
  not file.name : "__PSScriptPolicy*.ps1" and
  not file.path : (
        "?:\\Users\\*\\AppData\\Local\\Temp\\????????.dll",
        "?:\\Users\\*\\AppData\\Local\\Temp\\*\\????????.dll",
        "?:\\Windows\\TEMP\\ansible-tmp-*\\AnsiballZ*.ps1"
  ) and
  not user.id == "S-1-5-18"]