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Mal1t1a
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 Posted: Mon Apr 25, 2011 3:31 am Post subject: [VB.NET] Manually executing asm code? |
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Hi there, I'm wondering if there is a way to execute asm code in VB.NET? I write to the memory, and then after I've written (because it has to be manually executed by the client), I want to be able to have it run right after I'm finished writing. Is this possible? If so, how do I do it?
The way it works: Client Executes Action -> Action Calls ASM -> Game Updates.
I want it to be like: Write Memory -> Force ASM Call -> Game Updates.
This is how it would be:
mov [YYYYYYYY], eax <- eax would be my inserted value.
mov cl, [YYYYYYYY] <- The call I want to execute.
Is it possible to do in VB.Net?
Thanks.
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atom0s
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| Posted: Mon Apr 25, 2011 2:23 pm Post subject: |
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Look into:
WriteProcessMemory
CreateRemoteThread
You can write a cave that can be called with CreateRemoteThread. Or write a cave in a location where you need the code to execute and have the game jump to it when needed.
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Mal1t1a
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| Posted: Mon Apr 25, 2011 5:05 pm Post subject: |
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| Wiccaan wrote: | Look into:
WriteProcessMemory
CreateRemoteThread
You can write a cave that can be called with CreateRemoteThread. Or write a cave in a location where you need the code to execute and have the game jump to it when needed. |
Yes I am using WriteProcessMemory to write my instructions, I don't even need to allocate memory either as I have found a perfect spot in the games memory, all I need to do now is figure out how to call it with CreateRemoteThread EXample, so I'm googling all over the place to find an example that seems simple enough to follow.
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Innovation
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Joined: 14 Aug 2008
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| Posted: Mon Apr 25, 2011 7:35 pm Post subject: |
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| Code: | BOOL bExecuteAssembly(HANDLE hProcess, LPCVOID lpAssembly, SIZE_T dwSize)
{
BOOL bSuccess = FALSE;
LPVOID lpBaseAddress = VirtualAllocEx(hProcess, NULL, dwSize, MEM_COMMIT, PAGE_EXECUTE);
if(lpBaseAddress != NULL)
{
if(WriteProcessMemory(hProcess, lpBaseAddress, lpAssembly, dwSize, NULL))
{
HANDLE hThread = CreateRemoteThread(hProcess, NULL, 0, (LPTHREAD_START_ROUTINE)lpBaseAddress, NULL, 0, NULL);
if(hThread != NULL)
{
WaitForSingleObject(hThread, INFINITE);
CloseHandle(hThread);
bSuccess = TRUE;
}
}
VirtualFreeEx(hProcess, lpBaseAddress, 0, MEM_RELEASE);
}
return bSuccess;
} |
I don't know Visual Basic .NET, but I'm sure that you could do something similar using P/Invoke.
Last edited by Innovation on Thu May 19, 2011 5:09 am; edited 1 time in total |
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Mal1t1a
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Posts: 40
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| Posted: Tue Apr 26, 2011 11:31 pm Post subject: |
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Well, I already have inserted the Assembly code into the Process, err rather, overwritten the previous Code. However, I need to execute it after I overwrite it, as for it to be executed it requires user input, and I'm trying to bypass that.
I have not been able to get CreateRemoteThread working though, and I've spent several hours trying, and searching. In the end, I ended up deleting the code I had as nothing worked.. If needed to see what, I could try again.
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