Which best describes DLL injection?

Which best describes DLL injection?

• A. Forcing a program to load a particular DLL
• B. Replacing DLLs on disk
• C. Encrypting DLLs in memory
• D. Blocking DLL loading

Answer: (A)

DLL injection is the technique of forcing a program to load a DLL into its process, so that code inside that DLL runs within the target’s own memory space. This allows the injected code to execute with the target process’s privileges, intercept or modify functions, and extend or monitor the process’s behavior from inside. In practice, attackers or developers achieve this by using methods that cause the target process to load a chosen DLL—often by creating a remote thread that calls LoadLibrary with the DLL’s path, among other injection techniques. This description captures the essence of injection: the DLL becomes part of the running process and its code runs in that process’s context. Replacing DLLs on disk changes files outside the running process and doesn’t compel that process to load the new code. Encrypting DLLs in memory stops execution rather than causing a new DLL to be loaded into the target. Blocking DLL loading, of course, prevents the loading step entirely, which is the opposite of injection.

DLL injection is the technique of forcing a program to load a DLL into its process, so that code inside that DLL runs within the target’s own memory space. This allows the injected code to execute with the target process’s privileges, intercept or modify functions, and extend or monitor the process’s behavior from inside. In practice, attackers or developers achieve this by using methods that cause the target process to load a chosen DLL—often by creating a remote thread that calls LoadLibrary with the DLL’s path, among other injection techniques. This description captures the essence of injection: the DLL becomes part of the running process and its code runs in that process’s context. Replacing DLLs on disk changes files outside the running process and doesn’t compel that process to load the new code. Encrypting DLLs in memory stops execution rather than causing a new DLL to be loaded into the target. Blocking DLL loading, of course, prevents the loading step entirely, which is the opposite of injection.