Questions tagged [disassemblers]
A disassembler is a software tool which transforms machine code into a human readable mnemonic representation called assembly language.
126
questions
3
votes
1answer
343 views
Disassembly - Why the CMP instruction is multiplying by 2 the value being compared
I'll get right to the point, I have a crack me program, that is a program with a password inside that needs to be found so that you can complete the challenge.
I easily found the cmp instruction ...
7
votes
4answers
3k views
Can AI be used to write better decompilers/disassemblers? [closed]
In the past for years I used some disassembler and tried some decompiler, nowadays there's so much talking and stuff about deep learning and AI, I wonder if some can be used with those tasks (given ...
0
votes
1answer
525 views
Know which bytes are opcode and which operands in IDA
I want to extract a generic signature of a function in IDA and wanted to use just the opcodes of the instructions without its operands.
Example:
From the first instruction I want to know the bytes ...
1
vote
1answer
2k views
How to extract firmware from a chip ( snarfing) [closed]
Is there anyone who can guide me how do i do snarfing of firmware on a chip of a VIN Tuner.
Is there anyone who can do it ?
1
vote
1answer
541 views
Disassembler for Renesas RX62 micro
Does anybody know a free disassembler tool for decoding a Renesas RX62 micrcocontroller binary file? There had been www.onlinedisassembler.com, but this site is down and the new beta....
0
votes
2answers
2k views
OnlineDisassembler is down - any alternative?
Since weeks my beloved and favorite site www.onlinedisassembler.com is down and shows server error 500.
Does anybody know any alternative for trying different microcontroller architetures on an ...
2
votes
1answer
905 views
Capstone: What's the purpose of the 'address' argument in cs_disasm()?
I'm trying to play around with the Capstone Disassembler in C.
In the documentation they show the following use of the cs_disasm() function:
from here
count = cs_disasm(handle, CODE, sizeof(CODE)-1, ...
0
votes
2answers
2k views
Windasm32 cant allocate enough memory to display 151680 lines
Hey I was using Windasm32 today and I loaded a .dll file and it told me this
I tried to increase my virtual memory on windows 10 to 12000 and the max to 12000 and restarted the computer and ran ...
2
votes
1answer
170 views
Can I step through a binary with IDA (eval version), reading registers step-wise?
I am new to disassembly, and I'm trying to understand how a 32 bit binary is operating. I have the evaluation (free) version, 32 bit (Version 7.0.170920 macOS x86_64 (32-bit address size)).
I'm used ...
3
votes
3answers
3k views
Radare produces a bunch of `add byte [rax], al`, but why?
What does a bunch of add byte [rax], al mean? I see a lot of memory addressing point to specific parts of the shared library (.dll) that have for instance, this...
0x10064faf8 0000 ...
1
vote
1answer
529 views
Tools to translate x86-64 ELF to PPC (or i386 decompilation)
I've been working on a project on an IBM POWER8 system. I'd like to translate some very simple binaries from x86-64 to PPC.
Is there a tool that can either:
Translate the binary from x86-64 to PPC (...
-1
votes
2answers
806 views
extract opcodes using radare
When we have many binaries, there is a python base solution for disassemble and extract opcodes from binaries in IDA program.
Is there any or similar solution to disassemble binaries for Radare2?
0
votes
1answer
212 views
IDA Python recognize same register
As shown in the picture below, IDA PRO (6.8) knows to recognize that al and eax are referencing the same register.
Given two operands in IDA Python (i.e. by idc.GetOpnd(..)), how can I find that ...
1
vote
1answer
2k views
Elf file format finding .got and .got.plt segments
I'm writing ELF parser and simple disassembler x86. Having code like this
.text:000B5A2A call 0000B470 ;e.g. _glXSwapBuffers
...
...
got.plt:0000B470 jmp dword ptr [ebx+240h] ;jump to ....
0
votes
1answer
81 views
Help with animation function
I'm trying to find the function which is animating a bot ingame (singleplayer). I already figured out the animation state value with Cheat Engine. Freezing that value lets the bot repeat the animation ...
1
vote
0answers
2k views
Reverse Intel hex to programming code
I have a file in the Intel hex format, which was taken of from a pic16F1705 chip. I need to find a way to disassemble it into some form of human friendly programming language in order to make some ...
3
votes
5answers
6k views
Do you need a 64 bit disassembler like IDA Pro to disassemble 64 bit code?
My question is simply can you reverse a 64 bit compiled code using a 64 bit disassembler (like IDA Pro 64 bit) or can you use a 32 bit code disassembler. I'm a little confused.
6
votes
1answer
826 views
How to Make .text Section in Assembly Writeable for Win7-64 EXE
I have a basic XOR decoder that functions perfectly in Linux, but when I try to move it over to an exe in windows, it fails. I am leaving this question open for historical reference since the issue ...
8
votes
2answers
4k views
idapython - Get Xrefs to a stack variable
I am trying to write an IDAPython script that will return a list of references to a local stack-frame variable. However, I couldn't find any API that does so.
What I am trying to achieve is a code ...
3
votes
1answer
431 views
How does the 'graphic views' on Hopper Disassembler work?
I would like to understand better what is that information on "graphic views" at the inspector of Hopper Disassembler. I've checked the tutorial but it just skips this section.
Thanks.
1
vote
2answers
165 views
Real-time changes of executable on IDE/Assembler
I'm new on this, sorry for bad usage of terms or overextending an explanation. I'm learning code languages and the way I found to bring it to my world so I can learn it better was coding for/with ...
1
vote
1answer
844 views
MSP430 - IDA Pro Free Binary Dump
I have a assembly dump from a MSP430 binary in a normal ascii text file as below:
46f4 <strcpy>
46f4: 0d4f mov r15, r13
46f6: 023c jmp #0x46fc <strcpy+0x8>
46f8: ...
4
votes
1answer
963 views
Is it safe to load a virus to IDA Pro?
In other words, Is it safe to load a malware into IDA Pro on my personal machine? Would IDA Pro run the sample or load it into memory?
1
vote
1answer
605 views
Understanding the variables in stack layout
i am reading the "The Grey Hat Hacking-The ethical hacker's Handbook".The book is nice ,but there is a doubt on a particular subject.In the vulnerability analysis chapter it is trying to analyze a ...
5
votes
1answer
560 views
How can the problem posed for disassembly by the mixture of executable code and literal pools in ARM firmware be overcome?
Context and Background Information
Part 1: ARM firmware compared to firmware for other architectures
I looked at the ARM firmware in these two questions:
Running a binary identified as an ARM ...
1
vote
1answer
745 views
Android Native Library - How to match java references to sub_XXX function (static way)
I'm currently learning how native functions are implemented among the ELF SO files contained inside an APK. I'm using IDA.
Native calls are always achieved in this way.
// First load the library ...
5
votes
1answer
1k views
What type of disassembler is distorm?
In Alam you can find the classical differentiation between disassemblers. The author explains in general the two well known types of disassemblers:
The Linear Sweep technique starts from the ...
22
votes
1answer
50k views
Objdump - How to output text (eg ASCII strings) alongside assembly code?
Aim: I want to take hex and ascii data (derived from a binary file using xxd) and use Objdump (or a suitable other tool that Linux comes with) to output the memory addresses / offsets, assembly code, ...
0
votes
1answer
189 views
1
vote
1answer
758 views
C++ to assembly, GCC vs CL
I have following C++ code:
int main(){
int a = 1;
double d = 1.2;
return 0;
}
and get the following assembly using GCC 6.2 -m32:
main:
lea ecx, [esp+4]
and esp, -8
...
4
votes
2answers
2k views
How to find obfuscated hidden command line parameters?
The Amazon KindleGen command line app (Windows, macOS, Linux download links) has several undocumented command line parameters that I'm curious about. One of these hidden command line parameters is:
-...
3
votes
1answer
450 views
IDA Pro addresses of arguments
I am a newbie in reverse engineering and I was trying to understand this blog post:
http://0x0atang.github.io/reversing/2015/09/17/flareon2-concolic.html
At one point, the author says the following ...
-1
votes
1answer
438 views
winmain reversing the assembly to c code
this is I got so far
#include <windows.h>
int WinMain(HINSTANCE hlnst,HINSTANCE hPrev, LPSTR lpCmd,int nShow){
int k =0;
int j= 0 ;
MessageBox(0,"crackname","",0);
int i;
...
0
votes
0answers
49 views
What does the number after '@' symbol mean in IDA disassembly? [duplicate]
As you can see, IDA disassembly shows r0@1, r5@5, [sp+0h] [bp-18h]@7 etc. Presuming r0, r5 to be registers and [sp+0h] [bp-18h] to be a memory location, what does the number at the end signify?
1
vote
3answers
3k views
Mips disassembler
So, I am looking for disassembler code for MIPS commands, for example: if the program gets word of command like 3c1d8010, I want to get the name of the command and the registers, which it uses: lui sp,...
1
vote
2answers
5k views
Getting past a whole lot of anti-debug measures for a windows exe
I'm trying to debug a windows exe that is really full of anti-debug measures. It has pretty much everything you can think of DBGuiremotebreakin, Ntsetinformationthread, NtQueryInformationProcess, the ...
5
votes
2answers
3k views
idapython - Determine if item is code or data
I need to determine whether an IDA's item is code or data.
Sometimes, data resides in an executable's code section (virtual functions tables, switch tables and stuff).
So in IDA, you can sometimes see ...
2
votes
2answers
3k views
How to Find All Switch Jump Tables in IDAPython
I'm using IDAPython on IDA 6.5 and I'm trying to get all the switch jump tables in a DLL. Mainly I'm interested in jump tables that are jumped indirectly:
jmp ds:off_65018790[ecx*4] ; switch jump
...
0
votes
1answer
696 views
How can I read the assembly instructions of a C program from C#?
I want to be able to do what an ordinary disassembler does—list the assembler instructions of an arbitrary executable—but from C#. It would consist, for instance, of finding a specific instruction ...
2
votes
2answers
1k views
Radare2 to show code hints like IDA Pro?
I am trying to disassemble a binary with radare2, as a free alternative to IDA. Here is how the IDA disassembly of that section looks like :
Here is what I am doing with Radare2 (with an additional ...
0
votes
2answers
286 views
Are there Disassembler for Mac which supports scripting
Are there any disassemblers for Mac that comes in freeware. I have installed radare2 but finding difficult to use.
0
votes
2answers
3k views
LLDB disassembler not working, using command terminal,on mac el captain?
I have created simple code to test using lldb . This is the first time i am using lldb and i am familiar with gdb. while i am trying to disassemble the unix executable file its not working any ...
3
votes
2answers
1k views
Is there a tool to scan for code / functions that can account for different compilers?
I have a library DLL and a program that uses the library (statically; the DLL is separate).
My goal is to find a bunch of the functions from the library in the program, but unfortunately, it looks ...
0
votes
1answer
4k views
How do I log a string in x64dbg?
This one should be simple, but I can't figure it out. How do I log a string in x64dbg? I can log the address with a breakpoint but wasn't able to log the actual text.
3
votes
3answers
3k views
Any Disassembler for iOS?
Is there any iOS app for arm Disassembling?
I mean one that can run on iPhone.
Nor IDA or Hopper have any iOS version
2
votes
3answers
1k views
Disassembler for batch/automated processing
I want to extract opcodes (MOV, ADD, ...etc) from binary files 'exe files' but as I want the process to be completely automated, I was looking for a free disassembler which can be easily integrated ...
-1
votes
1answer
1k views
Extracting Opcodes of a binary
I want to extract opcodes 'Assembly instructions' from malware binaries . and because I have large number of samples I don't want to do it invidiously .. instead I want to automate the process of ...
4
votes
4answers
2k views
Identifying jump table of a switch statement
I'm using a linear disassembler (beaEngine), and whenever I get to a jump table section, I get an error (or an incorrect decode since beaEngine mistakenly thinks it is code).
How can I recognize this ...
4
votes
3answers
3k views
How does disassembler really work?
a simple portable executable file looks like :
I'm wondering how a disassembler works to parse the .text...to produce assembly code ?
Because the PE file in his raw format seems to be unusable and ...
1
vote
0answers
278 views
immunity debugger MSVCR90.dll R6034
I'm new to the science of reverse engineering. I recently downloaded immunity debugger 1.85 32bit Assembler-Level Debugger. My host machine is Windows 7 64 bit. I have python 2.7 installed as 32 bit ...
