CODEWITHSUNDEEP
c++dllassemblycode-injection
MisterDoy
MisterDoy

Reputation: 181

ASM/OPcode injection with C++

I'm trying to inject some ASM code into a Win32 program with C++. Is there a way to do this, avoiding DLL injection ?

This, for instance :

__asm{}

is only for the current program. Is there something similar used to generate hex code I could inject with WriteProcessMemory ?

Thanks in advance !

Upvotes: 0

Views: 3454

Answers (2)

Abyx
Abyx

Reputation: 12918

In MSVC it may look like this:

        void* shellcodeStart;
        void* shellcodeEnd;
        __asm {
                mov shellcodeStart, offset shellcode_start
                mov shellcodeEnd, offset shellcode_end
                jmp shellcode_end
shellcode_start:
                ... // your code
shellcode_end:
        }
        size_t cb = shellcodeEnd - shellcodeStart;
        WriteProcessMemory(hProcess, remoteAddress, shellcodeStart, cb, NULL);

Upvotes: 3

Prof. Falken
Prof. Falken

Reputation: 24867

One technique is to hand-assembly and put the code in an array, then copy the code where it should go. But this is straying into hacking land which I don't know much about.

Upvotes: 1

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