A recent report by Symantec found that more than 95 percent of all scripts analyzed by its sandbox tool were malicious and more than half executed from command line parameters. A primer on essential PowerShell security scripts is well worth reviewing to learn how you can use that language to improve your defenses and be more productive in administering Windows computers. This article shows you how attackers can leverage this language for their own evil purposes. It can install scripts that execute at boot time, which makes them attractive for hackers that want scripts to persist.”]
Source: https://www.csoonline.com/article/3253581/how-to-protect-your-network-from-powershell-exploits.html