What is defined as the illegal copying, distribution, or use of software without proper licenses?

The concept described in the question directly corresponds to software piracy, which is the unauthorized copying, distribution, or use of software. Software piracy undermines the rights of software developers and companies who invest significant resources into creating and distributing their products. It poses risks not only to the developers but also to users who may encounter malware or lack access to updates for pirated software. Therefore, software piracy encapsulates the illegal nature of using software without proper authorization, making it the most accurate term for this practice.

Other options, while relevant to discussions of unethical or illegal activities in technology, do not specifically address the act of replicating and distributing software unlawfully. Therefore, they do not fit the definition as precisely as software piracy does.