What technique is used to inject code into memory used by another process in Windows?

The technique known as DLL injection is used to inject code into memory used by another process in Windows. This method enables an attacker (or legitimate software) to run arbitrary code in the address space of another process, which can allow for manipulation or observation of that process's behavior. By injecting a Dynamic Link Library (DLL), the injected code can execute within the context of the target application, potentially gaining access to its resources and privileges.

DLL injection is often exploited by malware to gain control over processes or to alter the functionality of applications, making it a significant concern in cybersecurity. The process involves modifying the target process’s memory and is typically done utilizing the Windows API functions that handle process and memory management.

The other techniques listed do not directly relate to the injection of code into another process's memory. Code interception refers to capturing and altering function calls, which does not necessarily involve injecting new code into a process. Memory overwriting relates to changing existing data within a process’s memory but does not specifically describe the technique of injecting new code from outside. Code obfuscation is a method used to secure code by making it difficult to understand and analyze, rather than a technique for injecting code into other processes.