DLL injection involves...

DLL injection specifically refers to a technique used by attackers to insert their own code into the address space of another process while it is running. This is achieved by exploiting the dynamic link library (DLL) files that the process uses. Once the malicious DLL is injected into the target process, it can be executed with the same permissions as the target process, allowing the attacker to manipulate the program in various harmful ways, such as modifying its behavior, accessing sensitive data, or performing actions on behalf of the running application.

This method is particularly insidious because it can enable malicious activities without the user or system administrator being aware of the changes being made within the target application. DLL injection is commonly used in various types of attacks, including rootkits and malware, to gain persistent access to a system.

The other options are related to different types of attacks or malicious activities. For instance, compromising kernel-mode device drivers relates to low-level system manipulation, remote control of a victim's machine usually involves techniques like remote access Trojans, and gathering user data without permission could pertain to various forms of spyware or phishing. However, these do not specifically describe the process and intent behind DLL injection, which is centered around the manipulation of running processes by injecting malicious code.