Questions tagged [x64dbg]
An open-source x64/x32 debugger for windows with UI inspired by OllyDbg.
224 questions
0
votes
0
answers
14
views
Attach with X32Dbg behaves strange
I am trying to attach to a debug protected 32bit Windows program with X32Dbg and in general the attach process works and the program still run smoothly.
However I CANNOT pause the program and check ...
- 41
0
votes
0
answers
25
views
How can I compare different execution traces of the same exe, but ran with different parameters?
Context
I'm working on analyzing how a software's behavior changes when run with different parameters.
My goal is to compare the execution traces (e.g., function calls, memory accesses, or instruction ...
- 85
0
votes
0
answers
23
views
Log addresses of every called function in Ollydbg/x64dbg in multi-threaded program
I have 2 programs: one 32bit and the second one 64bit. I use Ollydbg/x64dbg to debug them, respectively. These programs are multi-threaded and I have a difficulty when debugging: when an important ...
1
vote
0
answers
37
views
how to logging API call in x64dbg
I want to logging all API calls between two breakpoint.
I have tried the trace option but it can not logging API name.
Any good plugin achieve this？
- 11
0
votes
0
answers
24
views
Dumping all import symbols from x64dbg
I want to export the symbol addresses from all loaded modules in x64dbg. I know I can do this DLL-by-DLL from the Symbols tab (click on one module > right click in table > Copy > Export Table)...
0
votes
0
answers
47
views
How to get which Tedit is referenced when retrieving text
Reversing a borland builder 6 application, I came across this function: @Controls@TControl@GetText$qqrv
Now, the two parameters for the function are:
LEA param_2=>local_8,[EBP + -0x4]
MOV param_1,...
- 1
0
votes
0
answers
34
views
x64dbg string references can not find
i am trying to register a software with x64dbg, but my experience is not enaugh for do this. Anyone can help me ? i am ready to pay price. Problem is can not find string references in x64dbg.i already ...
3
votes
1
answer
130
views
How can I set up a conditional breakpoint for the CreateFileW function for when a specific file/path is read in x64dbg?
I'm currently debugging a program using x64dbg, and I'm struggling to set up a conditional breakpoint on the CreateFileW function:
HANDLE CreateFileW(
[in] LPCWSTR lpFileName,...
- 85
0
votes
1
answer
88
views
X64DBG Conditional Breakpoint on Specific Opcode?
Is there any way to break on specific opcode in X64DBG?
For example i want to break on start of a function which is
55 | push ebp
8BEC | mov ebp,esp
can i set a breakpoint like opcode == 0x00EC8B55?
...
0
votes
0
answers
51
views
Why a breakpoint works in x64dbg but not in IDA?
I've spent all morning trying to find a solution to debug with IDA the same function I'm debugging in x64dbg.
In x64dbg, I just go to Symbols -> ws2_32.dll -> WSARecvFrom -> F2 (set ...
- 161
0
votes
2
answers
162
views
How can I debug if the program closes directly?
I'm trying to debug a game and it's closing under few circumstances:
When debugging (solved by hooking IsDebuggerPresent to return false when called by the game)
When setting a memory/hardware ...
- 161
0
votes
0
answers
105
views
Question about anti-debug methods and anti-anti-debug methods
I've come across several binaries that have simple anti-debug methods in place, like checking IsDebuggerPresent(), NtQueryInformationProcess(), etc. But I recently came across a binary that looked ...
- 133
0
votes
0
answers
43
views
How can I find the part of cmd.exe that processes windows batch commands before they're executed?
I'm able to find the ReadConsoleInputW commands for pause and reading input for commands but I'm unable to find the actual processing of the commands. I'm using x64dbg but I'm fairly new to Reverse ...
0
votes
0
answers
43
views
how to set a BP on button in SunAwtCanvas in x96dbg
I'm trying to debug a program in x96dbg that I think this is written in Matlab. There is no string related to buttons or something interesting. Then I go to Handles tab to find buttons and set break ...
- 1
1
vote
2
answers
301
views
reversing pyinstaller compiled exe
i created some compiled binaries using different languages and tried to understand them using x64dbg, the compiled binaries produced by the c language/gcc compiler were pretty easy to understand, then ...
- 11
0
votes
0
answers
236
views
Need Help Cracking a Program
So I've got this .exe that I want to crack. It's an old management system for people in truck loading business.
I kind of understand what's happening with window API calls but I'm unable to access the ...
0
votes
0
answers
47
views
X64dbg question
I got a program that I try to patch. Normally you get a message box or something to get at the right point in program. But this program behaves else. It opens, then you can type in your license number ...
- 1
1
vote
0
answers
36
views
Is it possible to create a CStringT struct in x32dbg/x64dbg to make them more readable?
I'm working on analyzing a program which makes extensive use of CStringT but I am unclear as to how these are represented in memory, as it does not seem to be consistent. For example using a x32dbg, ...
0
votes
1
answer
114
views
Create exe that jumps directly into main()-function from C
I am using x64dbg to explore image files on Windows. After the computer finishes prowling ntdll.dll it jumps to OptionalHeader.AddressOfEntryPoint.
But this is not my main()-function.
What is this ...
- 3
1
vote
0
answers
110
views
Can't find the error message in x32dbg
Am trying to reverse an activation program using the error message in reference string
but searching for the string is not successful "all modules - string reference"
tried to pause after ...
1
vote
2
answers
610
views
How can I jump to the start/end of a function in x64dbg?
I'm currently debugging a program using x64dbg, and I'm wondering how to quickly jump to the start or end (prologue/epilogue) of a function while I'm in the middle of it. I couldn't find this ...
- 85
1
vote
0
answers
109
views
Notepad can find my string, but x64dbg can't
I open v2game.exe with notepad, and I can see string "teleport" occurs a bunch of times.
Now I open v2game.exe with x64dbg (not running the exe). x64dbg can't find the needed string. Why? ...
- 133
1
vote
0
answers
122
views
Techniques for analysing an exe file
I am learning to use x64dbg application and I am exploring different methods for studying an application.
So far I know of only a few techniques as listed below:
String References Search
Call Stack
...
- 31
2
votes
0
answers
168
views
Help with reversing an application with x64dbg
I am a newbie to reverse engineering. I am trying to reverse engineer an app that uses some form of internet explorer frame kind of thing because I could see use of mshtml.dll and jscript9.dll and ...
- 31
3
votes
1
answer
358
views
Load PDB for MemoryModule-loaded DLL in x64dbg
I need to debug a DLL, which I have a PDB file for.
The debug target is a program, that loads the DLL using MemoryModule library from Github.
The loaded module isn't listed as a module in x64dbg, ...
- 43
3
votes
0
answers
340
views
How to see parameters in stack in x64dbg like in OllyDbg for known API calls?
Based on Detailed API call descriptions not available in x64dbg
When I debug a known API call like for example WSARecv, in OllyDbg I can nicely see the parameters in the stack:
I've installed both ...
- 161
4
votes
2
answers
295
views
Malware analysis - Debugger hangs at HttpSendRequestA
I'm reverse engineering a malware that at some point tries to connect to http://api.ipify.org in order to get the IP address of the infected PC.
I was able to replicate this behaviour with a small ...
- 308
2
votes
1
answer
143
views
Understanding the logic behind decompiled code
Hi I was learning reverse engineering by doing some crackme(s) found online using IDA and x64dbg.
I'm quite confused on the below decompiled code.
bool Logic()
{
char CODE[] = "RAND_STRING&...
- 161
4
votes
1
answer
1k
views
Change string value when string is in a RAM address x64 c++ program
I'm new to reverse engineering.
I'm simply trying to change the value of a string in x64dbg, of a program I make myself in VS
(It's a c++ program, and is VERY simple; it just prints a string, and two ...
- 41
2
votes
1
answer
458
views
xdbg64 Unable to find string.. Need help cracking a program
Ive been trying to crack my friends program for quite some time. He gave me permission and we are trying to see if his mod menu is ready to hit the market. Ive watched a couple youtube videos and I am ...
- 21
3
votes
0
answers
433
views
x32dbg error C0000005, EXCEPTION_ACCESS_VIOLATION
Having some trouble with cracking a program, as the software does not prompt me to enter a serial key for activation. Instead, a serial key 924D-E42E-427D is already displayed within the program. So ...
- 31
2
votes
0
answers
102
views
Problem while debug with x64dbg
I am debugging with x32dbg a program (x) which at some point opens another program (y). Is it possible to continue debugging also on program (y) when opened by the first one (x)?
Unfortunately, ...
- 21
5
votes
0
answers
689
views
Comparison of Windows Debuggers
I have some experience reverse engineering ELF files using tools like GDB, radare2, and Ghidra, but I am new to Windows debugging. There are quite a few different debuggers out there for Windows and ...
- 161
3
votes
0
answers
234
views
Exporting patches as loader in x64dbg?
Is there a way to export modifications made in x64dbg as a separate executable file, which can be used to patch a desired executable file without detection?
The resulting file should function as a ...
-1
votes
1
answer
179
views
Anti-patching checksum [closed]
I'm busy with debugging a program in x64dbg and it has some kind of anti-patching mechanism so can someone please advise me on how I would go about finding the functions which are calculating the ...
- 49
1
vote
0
answers
320
views
How can I set a breakpoint in x64dbg to be triggered when a certain message is logged?
I am debugging a certain program and I need to stop execution when a certain debug message is logged using OutputDebugStringA(). How can I set a breakpoint for this?
- 13
3
votes
1
answer
629
views
exe file not opening after patching
I hope everyone is well. I'm new here and I'm hope someone can help me with the problem I'm facing.
I've been trying to reverse engineer a program but everytime I change an instruction, not matter how ...
- 49
3
votes
1
answer
261
views
How to call Windows console in ASM and printf some values there?
Is there a working way to embed the windows console in disasm code? I tried AllocConsole with GetStdHandle or AttachConsole with PID of an existing console but it didn't work. I have tried printf ...
- 131
3
votes
2
answers
1k
views
x64dbg: Conditional breakpoint: how to log only if register value has changed?
What i'm trying to achieve is to use a conditional breakpoint, that never actually breaks but logs in x64dbg's console the value of r9 only when it changes, to prevent console cluttering.
But i do not ...
- 73
2
votes
0
answers
147
views
How to search for a graphical string?
I am trying to search for a string but in my case, that string is not like a normal string but it's a graphical string.
As you have seen, that is not a normal string that can search for but it's a ...
- 269
2
votes
1
answer
586
views
Instead of doing a (long) analysis of an .exe, can i run that .exe, attach Ida Pro's debugger to it, and get the pseudo code of functions i want?
Basically, I have this 64 bits game.exe file which is about 400mb. It takes about 24 hours to do the analysis of the file in Ida pro 64 bits free version.
Problem is i have to do it again cause there ...
- 73
2
votes
0
answers
340
views
Find caller function by DLL loading in x64dbg
First of all I'm noob at debugging task and I'm try to self-study to learn how to debug exe using x64dbg.
I have EXE file packed by themida. i bypassed themida packing using themida plugin in x64dbg....
3
votes
0
answers
520
views
Anti Dumping Techniques (C++)
how would I go about blocking Memory Dumps by corrupting the PE Header or blocking the Debugger to get an Handle?
I tried this already but it didnt work. Scylla could still dump it fine.
- 31
2
votes
0
answers
162
views
Find an address of injected code via GetModuleHandleA
I am reversing really old game (20 years old).
l2.exe loads Dsetup.dll Network.dll. (not sure about order)
inside of the Dsetup.dll i found and injection (kind of protection) into module Network.dll. ...
- 121
3
votes
0
answers
323
views
How would I crack a software that has Xor encryption
So, before you shout at me to go on google I would just like to say I am new to reverse Engineering. Like I have been doing it for a hour. So, I was doing a bunch of crackmes.one using the search all ...
- 31
2
votes
0
answers
484
views
What is the correct way to load pdb symbols to show the functions by their name instead of their addresses in x64dbg?
I am trying to reverse a portion of a game, that game loads a DLL file called "ddraw.dll".
Most of the DLL file functions don't appear by their names but appear by their addresses
for ...
- 269
3
votes
1
answer
837
views
Locating function parameters in x32dbg
I'm a bit rusty and trying to analyze a piece of code in x32dbg. As follows:
0627BF49 | 8B0B | mov ecx,dword ptr ds:[ebx] |
0627BF4B | 8B85 CCF5FFFF ...
1
vote
0
answers
146
views
Copy all ASCII in x64db
How i can copy all ASCII or Hex values starting from specific point without scrolling up or keep moving the mouse?
For example from below point till first offset.
Thanks
2
votes
1
answer
546
views
Trying to learn more about unpacking
I am working on getting better with concepts of unpacking manually to get more clarity on understanding packing routines and decryption logic, so I am trying a few tutorials on PESpin! Previously I ...
- 23
4
votes
2
answers
634
views
How to reverse a game and inject a dll in client program?
I am trying to make a bot for a game. But when I open the game in debugger like Ollydbg or in x64dbg the game simply closes and also it doesn't appears in the Attach to the process list in File menu ...
- 41