Welcome to this short, introductory tutorial for using by Mr. The goal of this tutorial is to teach you some of the fundamentals of the x64dbg and show you how closely its features and flexibility resembles its close cousin Ollydbg.While x64dbg is still in an alpha stage, its bugs are minor and few with only a crash happening under unlikely conditions. The Configuration.

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Configuring x64dbg is quite simple since the menu is much more concise than ollydbg, making the process much more user friendly. To access the configuration dialog, simply go to the Options menu and click Preferences. In the first tab labeled Events, you can configure what events you want x64_dbg to break on when they occur.

The configuration in the screenshot above is what I typically recommend and use for simple debugging. The options here are just like those found in ollydbg 1.10 with a few additional features. Here is the gist of what these features do. System Breakpoint: When loading a new process, the will cause x64dbg to break in the system function which initializes the application you are attempting to debug. TLS Callbacks: The TLS Callback is a function which is called before the main application runs. This can set parameters or even be used by certain protectors to implement anti-debug technology.

This allows you to break on this function. Entry Breakpoint:This causes x64dbg to break on the Entry point on the application. For general debugging, this is the only breakpoint you will need to have checked.

Lg Gp08 Linux Driver more. DLL Entry: This will break on the entry point of any DLL which is loaded by the process you are debugging. Thread Entry: This will break on the first instruction of any new thread initialized by the current process. Attach Breakpoint:When this is checked, it will cause x64dbg to break in the DbgUiRemoteBreakin function when attaching to an active process.

If unchecked, it will attach without suspending the process. DLL Load/DLL Unload: This will break in the system function when a new library(DLL) is loaded into or unloaded from the active process. The DLL Load breakpoint occurs before any of its code is executed. Thread Start/Thread End: This allows us to break in system when our debugged application initializes or terminates a thread. We can use the Disasm pane in order to change the appearance of the disassembled instructions. Here is a gist of what these options do.

Argument Spaces: This will put a space after every argument changing mov rax,rdx to mov rax, rdx. It essentially puts a space after every comma. Memory Spaces: This puts a space in between memory reference instructions and their operators. This causes mov eax, byte ptr ds:[edx+18] to look like mov eax, byte ptr ds:[edx + 18]. Uppercase:This changes all of the text to uppercase. Autocomments only on CIP: This will remove all comments, including references from the current disassembly except at the instruction pointer. The Misc tab allows you to configure x64_dbg to be the Just in Time Debugger so that the system can attach it to a process whenever a problem occurs.

Debugging x64_dbg Sample: In order to make this tutorial a little more hands on, I created a little program called x64_dbg Sample. It and its source are available for download directly from the x64_dbg sourceforge directory at the following link: Once you have downloaded this, extract it from the archive and let's open it in x64_dbg. To do so, you can start x64_dbg and drag and drop the file into the disassembly window or use the File ->Open option to do the same. Alternately, you can let the default x64_dbg program automatically register a shell extension for you so you can open files through the right click menu. In the debug menu, you can see that x64_dbg has the same hotkeys as Ollydbg. These commands provide some of the key operations that you will need to use in your regular debugging activities. Run(F9):This starts or resumes the process normally.