What aspect of malware analysis does malware disassembly primarily focus on?

In malware analysis, disassembly is a critical process that involves taking machine code and converting it back into a readable format for analysts. This process primarily focuses on studying the functionalities and features of the malware. By disassembling the code, analysts can understand how the malware operates, what it is designed to do, and the specific actions it takes on a system or network. This understanding is essential for developing effective countermeasures and defenses against the malware.

Other aspects, such as visual presentations, distribution methods, and social engineering tactics, are related to different areas of cyber threat understanding. However, disassembly itself directly targets the internal mechanics and operational capabilities of the malware, making option B the focus of this analytical technique. This knowledge is vital for identifying signatures for detection, understanding attack vectors, and formulating a response to mitigate the malware's impact.