A PowerShell Loader is a script or program that uses Windows PowerShell, a built-in automation tool, to secretly download and run malicious software on a computer. Cybercriminals favor PowerShell Loaders because they can operate without leaving obvious traces, making them harder to detect by traditional security tools. These loaders often receive commands remotely, allowing attackers to install malware, steal data, or gain control of the system. Because PowerShell is a legitimate tool used by system administrators, malicious use can blend in with normal activity, increasing the risk of undetected attacks.