A PowerShell script is a set of automated instructions written for Windows computers using the PowerShell command-line tool. These scripts can perform a wide range of tasks, such as managing files, configuring system settings, or automating repetitive processes. While PowerShell scripts are valuable for IT professionals to efficiently manage systems, they are also sometimes used by cyber attackers to gain unauthorized control, deploy malware, or alter system configurations. Understanding PowerShell scripts is important for both system administration and cybersecurity defense.