gasrauno.blogg.se - Defcon 4 meaning

#Defcon 4 meaning .dll
#Defcon 4 meaning code
#Defcon 4 meaning windows

Parse the exports directory of kernel32 to find the memory addresses of required API functions such as LoadLibraryA, GetProcAddress, and VirtualAlloc.

The reflective loader function finds the Process Environment Block of the target process using the appropriate CPU register, and uses that to find the address in memory of kernel32.dll and any other required libraries.

Call CreateRemoteThread (or an equivalent undocumented API function like RtlCreateUserThread) to start execution in the remote process, using the offset address of the reflective loader function as the entry point.

Calculate the memory offset within the DLL to the export used for doing reflective loading.

Copy the DLL into the allocated memory space.

Open target process with read-write-execute permissions and allocate memory large enough for the DLL.

The process of reflective DLL injection is as follows:

#Defcon 4 meaning windows

Windows doesn’t have a LoadLibrary function that supports this, so to get the functionality you have to write your own, omitting some of the things Windows normally does, such as registering the DLL as a loaded module in the process, potentially bypassing DLL load monitoring. Reflective DLL loading refers to loading a DLL from memory rather than from disk. It also allows adversaries to mask their actions under a legitimate process.

#Defcon 4 meaning code

Running code in the context of another process provides adversaries many benefits, such as access to the process’s memory and permissions. The code is inserted in the form of a DLL, since DLLs are meant to be loaded at run time. This method can also used to perform a DLL injection, that inserts code in the context of another process by causing the other process to load and execute code. When you need to load a DLL in Windows, you need to call LoadLibrary, that takes the file path of a DLL and loads it in to memory.

#Defcon 4 meaning .dll

DLL (Dynamic-link library) are the Microsoft’s implementation of the shared library concept and provide a mechanism for shared code and data, allowing a developer of shared code/data to upgrade functionality without requiring applications to be re-linked or re-compiled.ĭLLs may be explicitly loaded at run-time, a process referred to simply as run-time dynamic linking by Microsoft, and its code is usually shared among all the processes that use the same DLL.