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  1. #1
    Lyoto Machida's Avatar
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    Memory Writing...

    Well, I Made a simple console, with a int that you can see the value and change it anytime, Then i made a console application to write another value to that int..
    But idk what is wrong, it says Memory Written but does not happen nothing, I found the adress with C.E 5.6 and 6 ( I didn reopen the console, so the adress didn changed...) ..Here is my code:

    Code:
    #include <iostream>
    #include <Windows.h>
    using namespace std;
    
    int newvalue = 666;
    
    int main() {
    
    	while(true) {
    		HWND hWnd = FindWindow(0,L"mhtest");
    		if(!hWnd) {
    			cout << "Window not found!" << endl;
    			system("cls");
    
    		} else {
    			cout << "Windows found! Starting the memory hacking process.." << endl; Sleep(2000); system("cls");
    
    			DWORD pID;
    			GetWindowThreadProcessId(hWnd, &pID);
    
    			HANDLE pA = OpenProcess(PROCESS_ALL_ACCESS,false, pID);
    
    			if(!pA) {
    				cout << "Cant acess the program.." << endl; Sleep(2000);
    				system("cls");
    
    			} else {
    				int ss = WriteProcessMemory(hWnd,(LPVOID)0x00E79138, &newvalue,(DWORD)sizeof(newvalue),NULL);
    				if(!ss) {
    					cout << "Failed to write the memory.." << ss << endl; Sleep(2000);
    					system("cls");
    				} else {
    					cout << "Memory written!.." << ss << endl; Sleep(2000);
    					system("cls");
    				}
    			}
    
    
    		}
    
    	}
    
    
    }
    Possible problems:
    Converting the adress to hex (i just 0xADRESS it)..

    Please help me..

    If my code is wrong, please give me a example..And PS: Idk why but the WriteProcessMemory is returning 0 =( now i see that..
    Last edited by Lyoto Machida; 05-18-2011 at 04:54 PM.

  2. #2
    Lyoto Machida's Avatar
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    I tryed to clear my code, Waiting for help .. =(

  3. #3
    Auxilium's Avatar
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    Help yourself, best way to learn.

  4. #4
    Lyoto Machida's Avatar
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    Well if im here, its because i cant help myself -.-

    But i think i got the problem..
    Is the adress..

    The adress must be ME Test.exe(my program) + 19138 ..
    But how do i get the ME Test.exe ?
    Please help me..
    @Virtual Void

  5. #5
    open|Fire's Avatar
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    Quote Originally Posted by -Away View Post
    [FONT="Georgia"][COLOR="SlateGray"]

    Code:
    #include <iostream>
    #include <Windows.h>
    using namespace std;
    
    int newvalue = 666;
    
    int main() {
    
    	while(true) {
    		HWND hWnd = FindWindow(0,L"mhtest");
    		if(!hWnd) {
    			cout << "Window not found!" << endl;
    			system("cls");
    
    		} else {
    			cout << "Windows found! Starting the memory hacking process.." << endl; Sleep(2000); system("cls");
    
    			DWORD pID;
    			GetWindowThreadProcessId(hWnd, &pID);
    
    			HANDLE pA = OpenProcess(PROCESS_ALL_ACCESS,false, pID);
    
    			if(!pA) {
    				cout << "Cant acess the program.." << endl; Sleep(2000);
    				system("cls");
    
    			} else {
    				int ss = WriteProcessMemory(hWnd,(LPVOID)0x00E79138, &newvalue,(DWORD)sizeof(newvalue),NULL);
    				if(!ss) {
    					cout << "Failed to write the memory.." << ss << endl; Sleep(2000);
    					system("cls");
    				} else {
    					cout << "Memory written!.." << ss << endl; Sleep(2000);
    					system("cls");
    				}
    			}
    
    
    		}
    
    	}
    
    
    }
    your WriteProcessMemory is wrong, you need use the handle open with OpenProcess to write in a remote process.

    right way

    WriteProcessMemory(pA,(LPVOID)0x00E79138, &newvalue,(DWORD)sizeof(newvalue),NULL);

    and I think this addr 00E79138 is not a VA.

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  7. #6
    Fovea's Avatar
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    Process Security and Access Rights (Windows)
    Windows Server 2003 and Windows XP/2000: The size of the PROCESS_ALL_ACCESS flag increased on Windows Server 2008 and Windows Vista. If an application compiled for Windows Server 2008 and Windows Vista is run on Windows Server 2003 or Windows XP/2000, the PROCESS_ALL_ACCESS flag is too large and the function specifying this flag fails with ERROR_ACCESS_DENIED. To avoid this problem, specify the minimum set of access rights required for the operation. If PROCESS_ALL_ACCESS must be used, set _WIN32_WINNT to the minimum operating system targeted by your application (for example, #define _WIN32_WINNT _WIN32_WINNT_WINXP). For more information, see Using the Windows Headers.
    Don't use PROCESS_ALL_ACCESS when you only need PROCESS_VM_WRITE.

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  9. #7
    Lyoto Machida's Avatar
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    @open|Fire that was the problem, now its solved, reped + thnks...
    @Fovea Thanks, just learned something new, reped + thanked.

    Now i just need something, The adress is always changing, its "THE PROGRAM + 19138", ou do i get "THE PROGRAM"?

    Thanks

  10. #8
    Fovea's Avatar
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    Lyoto Machida (05-18-2011)

  12. #9
    Lyoto Machida's Avatar
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    Edit:

    Damm i cant figure it out, someone can explain me how do i get it?
    Cause the int address is 19138
    But the program address i always changing.. and need to Be PROGRAM ADDRESS + 19138
    HOw do i do that?
    @whit
    @Void

    @PROS

    plz help me =) =)
    Last edited by Lyoto Machida; 05-18-2011 at 10:02 PM.

  13. #10
    Omar the Sandnigger's Avatar
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    Quote Originally Posted by -Away View Post

    Edit:

    Damm i cant figure it out, someone can explain me how do i get it?
    Cause the int address is 19138
    But the program address i always changing.. and need to Be PROGRAM ADDRESS + 19138
    HOw do i do that?
    @whit
    @Void

    @PROS

    plz help me =) =)
    It's a dynamic address, it needs to be a static one.
    Oh and you forgot an ';' somewhere in your code.

  14. #11
    Melodia's Avatar
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    Quote Originally Posted by Little Cookie View Post


    It's a dynamic address, it needs to be a static one.
    Oh and you forgot an ';' somewhere in your code.
    Shut up Cookie.

    @-Away
    Pointers are your friend ; But Calculating size from moduleList / PEB / w.e as Fovea posted is pretty much the most efficient way to do it externally as you are trying to do (:
    Love You All~

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  16. #12
    Omar the Sandnigger's Avatar
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    Quote Originally Posted by Melodia View Post


    Shut up Cookie.
    Seriously
    What is your problem with me? I was trying to help.

  17. #13
    'Bruno's Avatar
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    I believe it was said already but...

    Get the module base address.
    I'm pretty sure there is simpler solution or more effective, but I did this when I was playing around with solitaire at the very beggining.

    Code:
    	MODULEENTRY32 mEntry32;
    
    	HANDLE hSnapMods = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pId);
    	if(Module32First(hSnapMods, &mEntry32) == TRUE)
    	{
    		do
    		{
    			if(strcmp(mEntry32.szModule, "solitaire.exe") == 0)
    			{
    				mAddress = (DWORD)mEntry32.modBaseAddr + appOffSet;
    				break;
    			}
    		}
    		while(Module32Next(hSnapMods, &mEntry32) == TRUE);
    	}
    <pId> is the process id.
    <mEntry32.modBaseAddr> will be the module base address.

    Now instead of copying it and see that works (or not), try to understand first what is in there.
    Last edited by 'Bruno; 05-19-2011 at 04:53 AM.
    Light travels faster than sound. That's why most people seem bright until you hear them speak.

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  19. #14
    Lyoto Machida's Avatar
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    Why the if(strcmp(mEntry32.szModule
    Keep giving error? mEntry blabla not compatible with char * blablaa

  20. #15
    Omar the Sandnigger's Avatar
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    Quote Originally Posted by -Away View Post
    Why the if(strcmp(mEntry32.szModule
    Keep giving error? mEntry blabla not compatible with char * blablaa
    strcmp() is in the cstring (string.h) header file.
    Hail Allah, he's our king.
    Bomb yourself down, so he's happy.

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