Questions tagged [debugging]
Process of analyzing live programs through software (e.g. ptrace) or hardware (e.g. JTAGs) devices.
539
questions
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23 views
Trying to debug with IDA Pro + Windbg on remote VM: It won't break or step
I'm new to remote debugging so plz bare with me.
I'm trying to break and step through code on driver loading, during windows boot. So I'm using a windows 10 host, running IDA pro with windbg. This is ...
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23 views
IDA + Windbg does not break on sxe commands
I'm new to remote debugging, so I have no idea why it isn't breaking. My setup is a Windows 10 x64 host running IDA pro with its built-in windbg debugger. The virtual machine is a vmware running ...
2
votes
1answer
137 views
How to get offset of specific function in exe?
Suppose I have self-compiled exe-file (aka portable executable), its source (c/c++) and generated pdb-file. And what if I want to get offset of its function (non-winapi function) in debugger (x64dbg, ...
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14 views
Memory Viewer/Debugger for VBA
I'm trying to understand the layout of VBA code in memory, how COM objects are structured, what VBA functions look like under the hood etc.
I want something like this:
I.e. a GUI that has some of the ...
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0answers
35 views
is it possible to get code out of chipset through reverse engineering?
for example, encryption/decryption mechanism was inbuilt in a chip, to get the code that performs this mechanisms, is there some ways you can get this code through reverse engineering? what tools and ...
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2answers
106 views
How to debug / analyze a Themida protected binary
Background: I have an application that has worked fine up until Windows 10 build 1511 but broke as of build 1607. It produces an access violation:
STACK_TEXT:
03799f54 00f91cfa 24d1ae78 0000000f ...
0
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1answer
30 views
Debugging Native Lib using IDA Pro Fails to Load Registers and other Information
Currently, I am debugging a native library in a test APK, however I am running into issues. First of all, I can connect to the debugger and attach to the process without any issues. In the first image ...
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28 views
How can I find out where relocated functions are in a Win16 executable in SoftICE?
Backstory: I'm poking through SimTower for Windows to discover the actual logic for how it decides how much alternative background is used for the SimTower lobby floors (the ones with the green ...
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1answer
36 views
print format in radare2 cannot output all my string
I was doing a CTF challenge and I need to see the value of RAX register in radare2.
I first dumped all of printable ascii characters as input, one of the function encoded the input and spit out the ...
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0answers
17 views
'... Debugger undefined or null reference' error when WinDBG TTD Scripting with Javascript
I tried Javascript scripting on WinDbg (TTD specifically); but even in simple example I get error
Unable to get property 'Debugger' of undefined or null reference.
Line was simply var ctl = host....
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0answers
12 views
Immunity Debugger Trace of Vulnerable Application
I'm trying to trace a vulnerable application while it is being exploited. I'm testing it on the application and exploit pair found at (https://www.exploit-db.com/exploits/36826). the exploit works ...
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1answer
47 views
IDA Pro Debbuger is debugging the original code and not the patched code
Using IDA Pro, I tried to patch int 2Dh to nop.
However, with the debugger, it seems that the original code is being loaded.
What may be the reason for that? This might be related for some protections?...
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0answers
26 views
How to debug an unknown Tricore binary
I want to analyze a binary from a automotive ECU with an Infineon TC1797 Tricore processor. I can load it in Ghidra, and have analyzed and reverse-engineered a bit of code at the starting address. I ...
1
vote
1answer
55 views
Debug bFLT in qemu-arm-static
I have bFLT binary (into linux-arm arch.) that I can run with qemu-arm-static .
I want to debug that binary dynamically with GDB.
I know I can debug binary with qemu like qemu-arm-static -g 1111 <...
1
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1answer
47 views
Mono.Cecil throws SymbolsNotMatchingException, how to find out Method line number?
I tried to use a PDB file to map the Instructions to the Sequencepoints in Mono.Cecil and find out the line number of a method. But none of the answers in any forum seems to work, because no matter ...
1
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1answer
80 views
Why IDA debugger on android doesn't show all threads?
My IDA Version is IDA Pro 7.5 SP2. And I'm trying to debug a .so file inside a .apk file.
Here's what I've done:
download a x86_64 system image android emulator from android studio
install that .apk ...
0
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0answers
56 views
Bypass Javascript Debug Prevention in Firefox
I've looked around, and can't find an answer for my specific question. The closest I could find was this.
I'm trying to reverse engineer some suspicious Javascript, but it repeatedly calls a debugger ...
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0answers
31 views
Can i follow the invoke function?
im trying to debug some C# app.
Flow: main -> load dll into mem -> main invoke some function (i want to be here after invoke called).
Im using dnspy.
1
vote
1answer
74 views
Is there a way to attach x86dbg with ida pro?
IDA has the option to use debuggers but the debuggers are quite limited. Is there a way that I can use to use x86dbg with IDA Pro?
1
vote
1answer
38 views
Kernel debug two physical MacBook pro devices
I've asked the same question at stackoverflow, but i'm gonna copy-paste it here as i might get more relevant answers(?):
I'm trying to kernel debug a physical Macbook pro device.
When my setup ...
0
votes
2answers
121 views
Get Zip password used by application
I bought a game, "They are billions", and I'm trying to edit a savegame on my singleplayer campaign to change some vars (cheating because im very bad player). But the file is a password ...
1
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1answer
64 views
How to load modules symbols to IDA while debugging a process
I am debugging a program that I compiled.
This program calls SetWindowTextW.
When I am debugging it with IDA I can step into this function, but it doesn't recognize anything there:
If I will load ...
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0answers
64 views
Why rundll32.exe could be loading a DLL multiple times?
Since I started reverse engineering I've found multiple DLLs that when being debugged(IDA + WindDBG) would be unloaded and reloaded continuously without any evident reason.
Most of the time I use ...
1
vote
1answer
74 views
Reverse engineer sticky notes to allow external script to open new notes
For a silly little project I wanted to do, I wanted to make it so that I could open new notes (Microsoft Sticky Notes) from an external script - preferably python. Although I'm not good at reverse ...
2
votes
2answers
80 views
Changing value of parameter with gdb
I have a file named exploit.c inside which:
#include <stdbool.h>
#include <stdio.h>
const char y1 = 'a';
const char y2 = 'b';
const char y3 = 'x';
const char y4 = 'y';
const char y5 = 'i';...
1
vote
1answer
45 views
analyze how data is read in android usb device
I've a huawei envizion 360, which doesn't provide any API for other application. But I want to read raw data from this device, to an android or to a raspberry-pi for debugging and development purpose. ...
0
votes
1answer
53 views
Program goes to suspend when buffer overflow occurs
Full disclosure: I am seeking help to complete a college assignment. I am seeking help on steps where I am stuck and unable to move forward, not a ready made answer.
I need to exploit it to get a ...
0
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0answers
53 views
Debug multithreaded program in X32dbg
I am still quite inexperienced in reverse engineering. I have a small program that establishes an HTTP connection to a server and send data via POST method to the servert. I see strings like Winhttp....
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0answers
82 views
EXCEPTION_ACCESS_VIOLATION in x32dbg
What is EXCEPTION_ACCESS_VIOLATION and how can i handle it?
I am a complete beginner and could not understand. Thanks in advance.
Edit: as I learned EXCEPTION_ACCESS_VIOLATION occurs when either ...
0
votes
1answer
58 views
How much of the kernel does remote kernel debugging allow you to debug?
This is a theoretical question because I've never set up remote kernel debugging before -- but I will do at some point, which should hopefully answer some of the experimental questions I have.
What ...
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1answer
62 views
What does "???" mean in x32dbg?
I see such things but I just couldn't understand. Do you have any ideas?
Thank you!
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0answers
19 views
Tools for tracing down a Windows-specific UUID generation?
I'm have a kind of "Crackme" program that generates a 4-byte Windows system-specific UUID.
It doesn't seem to be hardware-dependent - I have created 2 identical Windows 7 virtualboxes - same ...
1
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1answer
38 views
Switch between debuggers while paused on a breakpoint
Is it possible to switch between debuggers and preserve where you are paused? Often times I find myself wanting to use a feature from a different debugger while paused in a specific context as each of ...
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0answers
35 views
Debugging kernel modul with IDA
I have shell at linux-arm-embedded and running gdb-server, There is kernel module(ko) that I want to debugging .
How can I do that with IDA ?
1
vote
1answer
103 views
GDB inserting breakpoint cause Segmentation Fault
I was trying to play around with gdb, and I'm especially interest in seeing how the Procedural Linkage Table(PLT) and the Global Offset Table (GOT) interact with each other. So I set some breakpoints ...
0
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2answers
78 views
kd live local debugging !pte and db don't work (only shows context of the debugger for all contexts), but !vtop works
Says the PDPT and PDs of the process are at the same physcial frames (pfns) in both processes.
The first process is winword.exe and the second process is calc.exe
The virtual address in the first case ...
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0answers
29 views
Saving a breakpoint in radare2 loses the format string
Good day to you all.
I'm new to radare2 and reverse engineering in general.
Debugging a small crackme.
I want to save breakpoints.
Initially, everything is fine: db* > bps and load breakpoints: ...
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0answers
17 views
Run ltrace to avoid detection (on a different PID?)
I am trying to run ltrace on this file:
./launcher: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 2.6.32, BuildID[sha1]...
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0answers
181 views
Windbg vs x64dbg for network analysis
I have a program that I want to perform malware analysis on. The program seems to use HTTPs with SSL pinning (my theory) and some other proprietary protocol. I want to understand what is the best tool ...
0
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0answers
41 views
Access violation writing location
I am currently playing with C# and detours/trampolines using a library I found here:
https://github.com/xcvd/Detours
I am attempting to hook a known function in a game and then call the original ...
0
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0answers
140 views
SSL pinning and bypass
I'm currently investigating one very suspicious app on my system (Windows 10 x64 bit). I wanted to try and understand outgoing https traffic it utilizes by trying to MITM it using Fiddler but as I ...
0
votes
1answer
261 views
Program prevents x64dbg from starting or kills it if it's already running. What to do?
I have the following problem with x64dbg. I am trying to debug a x64 PE program with x64dbg on Windows.
It looks like the program has some sort of anti-debug protection. I have the following behavior:
...
0
votes
1answer
101 views
IDA Unknown Exception Code 6F4
So basically I had set a breakpoint on a WINAPI function call. When I tried to run the program and step over the breakpoint, the program exits with the popup window: unknown exception code 6F4 (exc....
0
votes
1answer
76 views
Why compiler is doing this?
While I was disassembling my own C code for practice I saw an interesting point which I want to share with you guys and needs to know the answer as I always get from here. Now, the interesting point ...
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0answers
17 views
Load an IDB file when debugging kernel to get the function names in IDA?
I am debugging a windows kernel, and i have already analyzed some modules and have their IDB files.
Now is there anyway that i can somehow "map" these IDB files to their corresponding loaded ...
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0answers
28 views
How to pause a kernel debugee instead of stopping in IDA pro?
While debugging windows kernel with IDA, the problem is i cannot pause it like Windbg, when its running and i click on suspend, 50% of times it just freezes/crashes, and other times it just gets stuck ...
0
votes
1answer
121 views
Difference between \n, \0, \x00 and data from /dev/zero when performing a buffer overflow?
I am working with a binary that involves a buffer overflow on two contiguous memory blocks allocated with malloc. The binary filles up the first buffer with whatever the user inputs and hardcodes the ...
0
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0answers
58 views
Using GDB to find the address of a buffer in a stripped C binary
I am working with a crackmes binary called Simple Overflow. It has two buffers with sizes 0x10 and 0x8, and it uses malloc to allocate two contiguous memory blocks (see <+25> and <+39> on ...
1
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2answers
102 views
Why eax is assigned to 'variable looked' like addresses
#include <stdio.h>
int main() {
int number1, number2, sum;
printf("Enter two integers: ");
scanf("%d %d", &number1, &number2);
sum = number1 + ...
2
votes
2answers
82 views
How to test and debug x86 Assembly exceptions in NASM?
I have seen all the exception "IDs" in the Intel Manuals, and just came across sandpile's exception guide, which actually shows some hexcodes. For example, "divide by zero error":
...
