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Mussy69
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 Posted: Mon May 26, 2008 8:32 am Post subject: [C++ Help] Hooking A Program To A Process? |
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Hey Guys Me Again,
Could somebody help me to hook lets say A Trainer to a process name called "Example123" ( Those Are Examples ) I'm new to C++ and would like help on doing so,
Thanks Alot, Much Appreciated ~ MuSSii
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samuri25404
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| Posted: Mon May 26, 2008 8:37 am Post subject: |
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A hook is probably something way away from what you mean.
Are you saying that you want to "attach" (in Cheat Engine's terms) to a process?
If so, look up the OpenProcess API on MSDN.
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Ferocious
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| Posted: Mon May 26, 2008 8:37 am Post subject: |
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its apperent that you don't know what is your objective.
you have two options :
1. you want to inject your code into the process.
2. you want to create a debugger that attaches itself to the process.
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tombana
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| Posted: Mon May 26, 2008 8:43 am Post subject: |
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| What do you mean by 'hook to a process'. Do you mean attach to a process like CE does so you can read it's memory?
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atom0s
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| Posted: Mon May 26, 2008 9:06 am Post subject: |
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Assuming you mean 'attach' as in being able to read and write to and from the processes memory, you would use OpenProcess to obtain a handle to the process to be used with the respected API, ReadProcessMemory and WriteProcessMemory.
OpenProcess requires a process ID to work, which you can get several different ways. The two common methods would be the use of:
FindWindow with GetWindowThreadProcId
or
CreateToolhelp32Snapshot with Process32First and Process32Next
There are tons of examples of using CreateToolhelp32snapshot in this section.
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oib111
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| Posted: Mon May 26, 2008 9:16 am Post subject: |
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Here's an example of "attaching" to a process with both of the ways that Wiccaan suggested. I opened the processes using PROCESS_VM_READ and PROCESS_VM_WRITE assuming that you were going to read and write to the file, but otherwise you should access the process access rights at msdn.com
| Code: |
BOOL ProcessOpen(char *szExeFile) {
HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);
HANDLE hProcess;
PROCESSENTRY32 pe32;
pe32.dwSize = sizeof(PROCESSENTRY32);
bool popen = FALSE;
Process32First(hSnapshot, &pe32);
do {
if(strcmp(pe32.szExeFile, szExeFile) == 0) {
hProcess = OpenProcess(PROCESS_VM_READ | PROCESS_VM_WRITE, NULL, pe32.th32ProcessID);
popen = TRUE;
CloseHandle(hSnapshot);
}
} while(Process32Next(hSnapshot, &pe32));
return popen;
}
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| Code: |
BOOL ProcessOpen(char *WindowName) {
DWORD pid;
HANDLE hProcess;
HWND hwnd = FindWindow(NULL, WindowName);
if(hwnd != INVALID_HANDLE_VALUE) {
if(GetWindowThreadProcessId(hwnd, &pid)) {
hProcess = OpenProcess(PROCESS_VM_READ | PROCESS_VM_WRITE, NULL, pid);
}
}
}
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Mussy69
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| Posted: Mon May 26, 2008 5:13 pm Post subject: |
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Is The Bold Part What I Must Edit?
| Code: | BOOL ProcessOpen(char * [b]Example123[/b]) {
DWORD pid;
HANDLE hProcess;
HWND hwnd = FindWindow(NULL, [b]Example123[/b]);
if(hwnd != INVALID_HANDLE_VALUE) {
if(GetWindowThreadProcessId(hwnd, &pid)) {
hProcess = OpenProcess(PROCESS_VM_READ | PROCESS_VM_WRITE, NULL, pid);
}
}
} |
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lurc
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| Posted: Mon May 26, 2008 5:20 pm Post subject: |
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FindWindow gets the Window Handle to a specific Window that matches the parameters inputted
The first paramater is lpClassName which is the Window Class and the second parameter is lpWindowName which is Window Name (the text in the title bar)
so the bolded part would be the window name, so say the window text was "Example1" and class name was "ExampleClass"
then you would do
HWND hWindow = FindWindow( "ExampleClass", NULL )
or
HWND hWindow = FindWindow( NULL, "Example1" )
or
HWND hWindow = FindWindow( "ExampleClass", "Example1" );
BUT this parameter is alreayd chosen for you and it is the inputted parameter for the function
so when you call the function like ProcessOpen( "Example1" ); would be valid.
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Last edited by lurc on Mon May 26, 2008 5:21 pm; edited 1 time in total |
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atom0s
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| Posted: Mon May 26, 2008 5:21 pm Post subject: |
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The Example123 there is a param of the function. You could do something such as:
| Code: | if( ProcessOpen( "Minesweeper" ) == FALSE )
{
// Failed...
}
else
{
// Opened...
} |
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HomerSexual
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| Posted: Mon May 26, 2008 6:32 pm Post subject: |
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Remember to put .exe
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Mussy69
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| Posted: Tue May 27, 2008 3:42 am Post subject: |
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Alright put it this way because im sorry but i dont quite understand,
Examples:
MapleStory.exe
SymbolTrainer.exe
Goal:
Make the symbol trainer "Find Maplestory" ( Attach Process ) Actually attach, could you help me with that code?
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lurc
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| Posted: Tue May 27, 2008 6:06 am Post subject: |
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| Mussy69 wrote: | Alright put it this way because im sorry but i dont quite understand,
Examples:
MapleStory.exe
SymbolTrainer.exe
Goal:
Make the symbol trainer "Find Maplestory" ( Attach Process ) Actually attach, could you help me with that code? |
See this is what happens when kids come from using Cheat Engine to actually wanting to program for hacking purposes only. Your getting ahead of yourself and you need to learn all the basics before you start anything huge. There is no "Attaching" What your actually doing is opening (gaining access to) a handle for a certain thing like the Window or the process and using it in certain API to make your program things such as Read memory, write memory, send keys, etc.
It's been posted already how you could do this ( oib111's code, and lots of examples within the section )
Anyways to your question you can use the code snippet posted by oib111 (ProcessOpen using the CreateToolhelp32Snapshot method) except your going to want to add a handle parameter or make hProcess global.
so it would look like this:
| Code: | BOOL ProcessOpen( __out HANDLE hProcess, __in char *szExeFile) {
HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);
PROCESSENTRY32 pe32;
pe32.dwSize = sizeof(PROCESSENTRY32);
bool popen = FALSE;
Process32First(hSnapshot, &pe32);
do {
if(strcmp(pe32.szExeFile, szExeFile) == 0) {
hProcess = OpenProcess(PROCESS_VM_READ | PROCESS_VM_WRITE, NULL, pe32.th32ProcessID);
popen = TRUE;
CloseHandle(hSnapshot);
}
} while(Process32Next(hSnapshot, &pe32));
return popen;
} |
So in your code you would define HANDLE hProcess somewhere and then call the function like: ProcessOpen( hProcess, "MapleStory.exe" );
K i g2g to school now, later.
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Mussy69
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| Posted: Tue May 27, 2008 6:33 am Post subject: |
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I did not want this for hacking purpose
i did not even need this, i am asking to save it for future use 
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lurc
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| Posted: Tue May 27, 2008 7:56 am Post subject: |
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| Mussy69 wrote: | I did not want this for hacking purpose
i did not even need this, i am asking to save it for future use |
oh well then my mistake. Anyways, like i said, its always good to get all the basics learned first because then it gets easier from there to understand everything you see 
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Mussy69
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| Posted: Tue May 27, 2008 6:47 pm Post subject: |
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yeah thats true because after i learnt abit i went back to reading the tut and before im like huh whats the  but now i understand it, thanks for your help everyone 
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