Retrouver Serial Avec Ollydbg Mac
I would like to introduce you now to a more advanced and professional cracking technique, cracking using a debugger. What is a debugger? In few words, a debugger is a software that will let us look in the asm code before and after the code is executed by the cpu.
The debugger will pause the the execution of the code and will allow us to trace it step by step as the cpu executes it. All crackers uses a debugger, even W32Dasm has a debugger built in but is not very confortable.
The most advanced debugger for cracking used by all crackers is OllyDBG, this tool will become your friend, your partner, it will be for you the tool number one!Configurations of your OllyDbg. Let's do some configurations, press alt+o to access options and go to the CPU menu.
Make you settings look like in this picture:After this go to EXCEPTIONS menu and make your settings look like in this other picture:Ok, we are done for now. We will use olly for everything, like patching, finding serial keys, unpacking, studing, etc.We will start our first lesson with olly by finding the serial key of a crackme, during tracing the code it will be very easy to understand where we should patch if needed.Our mission in this lesson is to find a serial key for our entered name.Step 1.
Run the crackme and you will see that it needs a name and a serial number, enter some fake info. Click on check serial.:? Nothing happens Lets find a real serial for our name now!Disassemble our target with w32dasm then click on the imports button. See the picture below:On the dialog box that shows up find this: USER32.GetDlgItemTextA like in the picture below:Select it like in picture above and double click on it, you will land at the address: 004011DF (write down this address), just a bit below this we have an other reference to USER32.GetDlgItemTextA at the address 004011F0 (write this address down too).
Close W32Dasm, we don't need it anymore.Step 2. Run OllyDBG and click on file, open, browse to our crackme and open it. Cool, you should see the asm code now.
Retrouver Serial Avec Ollydbg Mac Pc
Press F9 button from your keyboard then the crackme should show up. Enter your name and any serial number but don't click on 'check serial' button yet. I will enter MiStErX as name and 12345 as serial.
What Is Ollydbg
Return to OllyDBG then click on 'Go to Address' button. Debuggers:DebugView v4.77:OllyDbg v1.10:Zeta Deb v1.3ugger.NET Decompilers:Dotnet IL Editor v0.2.6:ILIDE# v3.0.1799.34705:Red Gate's.NET Reflector v7.4:Delphi Decompiler:IDR (Interactive Delphi Reconstructor) v2.5.3:Visual Basic Decompilers:P32Dasm v2.8:VB Decompiler Lite v5.0:Disassemblers:Dotnet IL Editor (DILE) v0.2.4:IDA Pro v5.0:Hex Calculators:HexTool v1.7.0.1:Reversers' Calculator v1.2:Hex Editors:BIEW v6.1.0:Frhed v1.6.0:Hiew v6.50:HxD v1.7.7.0:MiTeC Hexadecimal Editor v6.0.0:Memory HackingMemory Hacking Software v6.1.