What DLL injection allows an attacker?
DLL injection is a technique which allows an attacker to run arbitrary code in the context of the address space of another process. If this process is running with excessive privileges then it could be abused by an attacker in order to execute malicious code in the form of a DLL file in order to elevate privileges.
What does hooking mean in C++?
With “hooking” I mean the ability to non-intrusively override the behavior of a function. Some examples: Print a log message before and/or after the function body. Wrap the function body in a try catch body.
What is an injector in DLL hooking example?
A program that manipulates a target process and makes it load hook is called an injector. In our example, we imply that the hook setup code is contained within an external DLL resource that is an injection object. The overall flow for preparing the hook to be loaded and executed requires the injector to follow these steps:
How to inject a DLL into a process?
Injecting the DLL by creating a new process. This method takes the DLL and forces the executable to load it at runtime, thus hooking the functions defined in the DLL. There are various ways to inject a DLL using this approach.
Where does the DLL injection hook library go?
If the injection went well, the hook library is loaded in the target process, and the DllMain function is executed so that we can set any hooks we want. To implement the hooking itself, we recommend using one of the many already existing solutions. There are a lot of them available as open-source, free, or partially free solutions.
How to hook an API to a DLL?
We must understand that there are various methods to hook an API: Overwriting the address of the function with the custom function’s address. Injecting the DLL by creating a new process. This method takes the DLL and forces the executable to load it at runtime, thus hooking the functions defined in the DLL.