Questions tagged [x64dbg]
An open-source x64/x32 debugger for windows with UI inspired by OllyDbg.
74
questions
0
votes
1answer
29 views
x64dbg (x32dbg) log registers every step like windbg
So I just switched to x64dbg (really using x32 atm) from windbg and so far I like it but the one thing I'm missing is windbg printing all the registers every step in the command window. Anyone know ...
0
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0answers
22 views
x64dbg stops at question marks
I tried to debug an exe file and there are multiple lines with three question marks. When you run the file after a few breaks it will get to the question marks and stop there. On further running you ...
1
vote
1answer
44 views
I am analyzing an exe with x64dbg but I dont see the address 00401000 [closed]
Will every .exe fille start from 00401000 or am I wrong assuming such a thing.
1
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0answers
55 views
Process terminating when breakpoint reached
I want to set breakpoint on the recv function to replace the received packets. But, I can not put breakpoint on any instruction in the program, the process simply closes with code 4000001f. I also ...
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vote
0answers
66 views
Hearts Game Passing Cards
I'm trying to make this Hearts game so that i can select more than 3 cards.
This is the func that will compare how many cards i've chosen with 3
it'll jump to this address if > 3
so i replace the ...
0
votes
2answers
111 views
How to know what does the function do?
I've made a simple c++ program. In the ollydbg i searching for the string which is my name, there are 2-3 call functions near the string location but i don't know what those function do.
My question ...
0
votes
1answer
42 views
'local call from' in x64dbg
In OllyDbg there was a thing called "local call from xxx,xxx,xxx,xxx ... " which helps me know from where a function is being called in the entire module. Does such a feature exist in x64dbg as well?
0
votes
1answer
22 views
Is there a way to export all the strings for a certain module in x64dbg?
I have an encrypted file that I was able to step through the code until that specific DLL file was decrypted in memory and I was able to list all of its strings. It has a ton of them that I would like ...
0
votes
1answer
87 views
Storing a string with with x64dbg
I want to patch a Windows binary (actually an ocx) with x64dbg. More specifically, I want to store a string of 60 bytes and store its address in EAX at a certain point.
Do I just have to add it to a ...
0
votes
1answer
60 views
What does ds mean?
When debugging with x64dbg I sometimes see mov ss:[address] 0xAA, I know that this means: move 0xAA into memory at specified address.
But what does
mov ds:[address] 0xAA
mean?
0
votes
1answer
94 views
What does this function actually do?
I'm taking part in this reverse engineering lab at college and we have this final big homework project. I have a part of the binary that changes it's own asm code by iterating through it's own bytes ...
1
vote
1answer
139 views
x64dbg how to set conditional breakpoint on WinAPI function
I am trying to solve a GUI based crackme. https://crackmes.one/crackme/5c68758633c5d4776a837cc4 so that I learn security. I want to set a conditional Break point on user32.CallWindowProcA. Microsoft ...
0
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1answer
97 views
Trace back function call
I'm learning reverse engineering and I'm trying to find where an error message is called.
I want to get in the part of the code, in the main module, where it decides to display the error message or ...
2
votes
1answer
182 views
Reverse engineering file format - ImageLink
I have some technical documentation which is supplied in the form of a generic Windows viewer and a database. The database contains different "books", which are represented by a bunch files:
book.bbi ...
0
votes
1answer
156 views
x64dbg - Locating where data is initially written
I am hoping someone can help me with a question or two.
Essentially I used to be a computer programmer who always wanted to get into a bit of game hacking, having not done any serious programming for ...
0
votes
1answer
252 views
Go back to the function call address
My question is simple : When I enter into a function call, I can't go back to this same call. Is there a functionality which could permit me to do this in x64dbg?
Or for example if we want to trace ...
0
votes
2answers
90 views
Print opcodes in trace - x64dbg
How can I print the opcodes in a trace log?
I can use {x:bswap([cip])} but this will print a fix amount of bytes (which most of the time will end up as either more or less number of bytes), ...
0
votes
1answer
252 views
Debugger always paused in ntdll.Kifastsystemcallret
I am using x32dbg to debug a program. I want to find the line which corresponds to a pop up message in my program to put a Break point.
But everytime that I set "Pause" after the pop up window's ...
0
votes
1answer
252 views
x64dbg - Conditional breakpoint based on function argument
How can I set a conditional breakpoint based on the argument of a function?
I am trying to break on the windows function LoadLibraryExW: https://docs.microsoft.com/en-us/windows/desktop/api/...
0
votes
1answer
76 views
The callstack does not show the message handler
After clicking a button or doing anything which might generate a message to be translated and dispatched, why is that the callstack might not show the message handler?
Say I am reversing an ...
1
vote
1answer
89 views
Is there any debugger that supports step-back? [duplicate]
In Ida when I use debugger, but I can't step back.
Is there any debugger that allow go backwards?
0
votes
1answer
57 views
x64dbg “System” meaning
I'm a bit confused about what "system" refers to when looking at the callstack in x64dbg. Does it mean the code is currently being executed in ring0? I thought that only system calls are executed in ...
2
votes
1answer
71 views
dongle check happen before a debugger start debugging
i'm trying to fake the test ( dongle exist )
but one problem that i encounter is that the application detect it before i start debugging it .
this is what happen with more details : open( not ...
2
votes
1answer
169 views
How to save (trace) the execution route/sequences in debugger and Replay?
is it possible to save the step-by-step execution route of the program?
i.e. lets say in x64dbg the program executes one handle after another
and so on, probably hundreds of calls...
But according ...
0
votes
1answer
123 views
How to locate an specific data structure in an executable?
I need to locate an specific "struct" variable in the data section from an assembly. This structure is used for an specific System Function (Windows) "SetCommState()". I'm wondering how to locate the ...
7
votes
3answers
4k views
OllyDbg vs x64dbg - Is there anything in OllyDbg that is not available in x64dbg?
OllyDbg had been nice in the past, but as it was frozen, x32dbg/x64dbg era came.
However, some people still use OllyDbg. Are there any reasons to use the old OllyDbg still? Doesn't x32dbg/64dbg covers ...
1
vote
1answer
193 views
Run any line/command in x64dbg
Is it possible, to run whichever line I want?
For example, if it is at black position, and i want to run the RED CIRCLED command:
I couldn't find a way to do that, neither in right click or etc......
1
vote
1answer
388 views
x64dbg how to watch all changes after one step
We know that x64dbg will mark the changes as red color after we step an assembly instruction, so how can I get all changes without scroll monitor windows?
x64dbg 32bit version trace:
NEW UPDATE
...
2
votes
1answer
294 views
What's the fastest way to set a breakpoint when a value I know gets written in memory, if the memory address is different each time due to ASLR?
I have a 64bit exe I'm debugging with x64dbg.
I'm searching for a specfic string value myvalue that sits encrypted somewhere in the exe (so, searching for myvalue at the beginning returns nothing).
...
0
votes
2answers
256 views
.exe file to .class, decompiled to .java, how to put back to .class?
I'm trying to reverse engineer a very complex .exe to alter its behavior.
Ran JWScan that tells me it's been wrapped with Jar2Exe (which I also saw during debugging).
Looking at the complex exe with ...
1
vote
0answers
841 views
How to step to specific function call?
I'm reverse engineering an application and I identified a specific function call that has an output that I need to capture. For the actual capture, I'll do a memory dump, so that I can handle. However,...
2
votes
1answer
160 views
Debug a windows service entry without windbg
An answer to a similar question here mentions that the entry of a windows service can be patched to allow attaching a debugger (in my case x64dbg). Google searches on the topic are all related to ...
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vote
2answers
970 views
Automating bypassing anti-debug checks
I'm working on bypassing the anti-debug checks of an unpacker in x64dbg. My end goal is to bypass all of the checks so that I can run the (unmodified) process with a debugger attached without any ...
1
vote
2answers
144 views
How to reach functions triggered by non-standard buttons?
I've already read related posts such as:
link1: https://stackoverflow.com/questions/24138087/how-can-i-set-a-breakpoint-for-a-button-click-using-ollydbg
link2: How can I set a breakpoint for a button ...
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vote
0answers
72 views
x64dbg flow-indent style trace logs
I have recently been using x64dbg a lot. I am coming from using tools like dtrace and frida-trace on macOS. Is there any way to get flow-indent style trace logs in x64dbg? Or would you recommend a ...
2
votes
1answer
210 views
Does x64dbg display the whole memory info even for a simple program opened?
I'm very new in software reverse engineering. I created a very simple c program using Visual Studio and the code is listed below.
#include <stdio.h>
void main()
{
int x, y, z;
while(...
1
vote
2answers
1k views
Comparison between orginal and modified DLL files with x64dbg
Is it possible to find the modifications between a original DLL file and a modified one using x64dbg?
And, if I can't do it with x64dbg, what tool would be better than a debugger to find the ...
1
vote
1answer
353 views
Outputting a patched DLL from x64dbg
I've been working on reversing an extremely outdated piece of software that I happen to need in order to get at the information stored in some equally outdated "database" files.
Using x64dbg, I've ...
2
votes
0answers
137 views
How to solve anti-patch protection involving NtContinue? [duplicate]
I'm having an issue when trying to patch an application. If I open the .exe application with x64dbg, it first goes through ntdll.dll and then runs the application module. It works fine as long as I ...
4
votes
1answer
336 views
Search strings in multiple files/processes/modules (x64dbg)
when you click String references in x64dbg, it only lists strings from current module/file. Is that possible to search strings in multiple (selected) files/modules?
3
votes
1answer
392 views
x64dbg - see the current position?
i.e. when the program is running, and x64dbg is attached to the process - how can i see where it is at this moment?
3
votes
1answer
157 views
Unable to use CreateRemoteThread in target process
I'm trying to get a debugger attached to a malware, but it seems to pick up whenever a new remote thread is created (which makes it so I can't use Scyllahide).
Even if I suspend all threads, it does ...
2
votes
1answer
95 views
Forcefully interpret code in x64dbg
I was just wondering if there was a way to force an interpretation of a block of code in x64dbg.
The section im analyzing fluctuates between this:
and this:
2
votes
2answers
4k views
How to view string references?
I have attached debugger to process/application (exe), but when i go to string references, it shows ntdll.dll references, instead of program.
how to get the references from program itself?
is it ...
4
votes
1answer
1k views
How to copy binary file with x64dbg\x32dbg after it changed it self
I know how to do it with OllyDbg but with x64dbg\x32dbg I don't know how to do it.
I have a packed binary file and at some point it unpacks itself and I found the point where it does it.
I want to ...
0
votes
1answer
2k views
How can i add plugins in x64dbg?
I am trying to add 'xAnalyzer' plugin into it but after copying the files, I can't see it in debugger.
Its installation instructions are not working.
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0answers
127 views
Failed to set breakpoint (Anti-debug protection)
Sorry for my bad English in advance.
There is a program that has some protection. The problem is I can not set hardware and software breakpoints in x64dbg (to be more precise - not everywhere), cuz ...
1
vote
2answers
425 views
FThunks when trying to get IAT
Pretty new to RE so sorry if this is a dumb question.
I'm trying to manually unpack an executable and I believe I've found the OEP. However, when I use Scylla to try to fix the import table of the ...
1
vote
1answer
276 views
identifying function prototype from dll
I have an exe file and a dll file. This exe file uses the dll to decode input file. This exe file is gui based and does not support command line execution.
So my requirement is to create a program ...
0
votes
1answer
480 views
x64Dbg view jumps to selected command
I've poked around the settings for x64dbg and never managed to find this. I was just wondering if there was an option for x64dbg similar to ollydbg's "show jumps to selected command":
Thanks all
