Cheat Engine

porring09 · Newbie cheater Reputation: 0 Joined: 11 Feb 2014 Posts: 11

Hi, I hope there are someone make my app fixed,

I make a memory scanner in C++ Language,
Before i make it in GUI version, i used DevC++ first to make some Header file then it works fine but kinda Slow when scanning a Process

I try to use it in winmine.exe(Mine Sweeper) and Farm Frenzy 3 that used more Memory.

It takes 10~20 seconds of scanning in minesweeper depends on what value input use for comparing.

and for Farm Frenzy it takes 30~40 Seconds of scanning depends on what value input use for comparing.

after few testing i convert it in a GUI'd version i called it Critical Engine hehe.

But there are some problem on it. and i need your help Sad

when i used it in winmine(that used lower memory) the application works fine, but when i scan in Farm Frenzy or any game that use larger memory
Like (Grand Chase) it makes the GUI'd Freezed and i never stop Looping.

Please Help Sad

* I don't know how i make the Scanning Procedure Fast like CE
* I have an idea about avoid Freezing GUI but i don't know how to use System::Threading::Thread in VC++ 2008 (I only know in VB.net)

Help me Out Sad

Here is my Code:

MemoryScanner.h

Stylo · Posted: Mon May 26, 2014 2:22 am Post subject:

Execute the scanning from a separate thread, that way the current thread (GUI's thread) won't have to wait for the scan to end.

atom0s · Posted: Mon May 26, 2014 2:06 pm Post subject:

You are calling ReadProcessMemory way too much which is causing your major slow downs as well. For each page, dump the whole page into your application (or a temp file on disk) and then scan through that instead of reading 4 bytes at a time from the process.

Polynomial · Posted: Sat May 31, 2014 6:43 pm Post subject:

porring09 · Newbie cheater Reputation: 0 Joined: 11 Feb 2014 Posts: 11

Thank you sir(S) for your replie(s)

I didn't get what you mean , but i have an idea

You just say if the VirtualQueryEx detects the page is Readable/Writable
i should read the whole Page/Region <For example the Size of Page/Region is 65536> then i should read it with ReadProcessMemory in just one Swipe!

then put it in a dump(a File) to prevent too much memory Space Usage,
then Read the File Base on what Type(Size) i need , like int = 4 Bytes

sir can you give me an example please? Sad

* How to dump Read Bytes(Chunk of ReadBytes) into a temporary file
* How to Read Bytes from the temporary file then put it in an Array for the next scan event
* Pseudocode , Algorithm , Sample Source Code.

with comments, i would like to understand the logic, flow for better performance of the app.

Thank you again..

ProjectEz · Posted: Sun Jun 01, 2014 12:23 am Post subject:

I saw something like that in codeproject, unfortunately, as I can remember, it is in C#...
but his process in creating a dump file is writing to a text file,
so probably, you can read that too line by line, you can just google it, it will be a great help for you Smile

Also thank you for this thread, gave me lots of idea...

Polynomial · Posted: Sun Jun 01, 2014 6:48 am Post subject:

You could also do heap enumeration, similar to how this blog post shows. If you only want to target heap memory (most things are in heap) rather than static stuff from PE segments, and don't care about memory created with VirtualAlloc, you'll get a really awesome overview of the process memory space and massively reduce overheads.

To answer your questions:

"How to dump Read Bytes(Chunk of ReadBytes) into a temporary file"

That's simple. System.IO contains a class called File, with a static method called WriteAllBytes. To get a temporary file, try Path.GetTempFileName, then write to that.

"How to Read Bytes from the temporary file then put it in an Array for the next scan event "

Turns out that's easy too. Just take your temp file name and use File.ReadAllBytes(path) to get your byte array back.

"Pseudocode , Algorithm , Sample Source Code."

I'll leave that bit to you. It's not difficult to work out what it's meant to do.

porring09 · Newbie cheater Reputation: 0 Joined: 11 Feb 2014 Posts: 11

Thank you Burningmace for your answer Smile

I'll gonna try it now Smile

If i have some problems, i will tell it again here..

Thank you all of you Smile

porring09 · Newbie cheater Reputation: 0 Joined: 11 Feb 2014 Posts: 11

Sir thank you for your previous replies Smile

But i have a problem Sad

I hope you will help me again.

*I dump all addresses that is equal to the given value.(Therefore i don't need to store all Addresses in a Large number Length or Array.)

*I can read a 256 Bytes as 1 chunk then Splt it into 256 Array Sized.
(I can't Read more than 256 , like 1024 , 2048 , 4096) the application abnormally exits when i read a chunk of bytes with the size of more than 256.

Problem:
*Can't read more than 256 bytes
*After Splitting up the 256 bytes and then scan per 4 bytes(meaning build a 4 bytes = Convert Array of 4 bytes into 1 integer value) then if equal to the given value , dump the given address to the temporary file.
It gives me some error whenever i try to do this

Read 256 Bytes -> Assume the the Value of Chunk(256 Bytes is 65536)
-> Split into array of 256 -> Scan it by the number of bytes(eg: 4 bytes) -> Loop until the index is (Index < (ArraySize - (ScanSetBytes - 1))) ->
Build the 4 bytes into a 1 value -> If Equal then Dump the Given Address.

Please is anyone can give me an example? Sad