Questions tagged [decompile]
Process of translating an unstructured assembler program into a structured high-level language program (e.g. translation from x86 to C).
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questions
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37 views
How to retrieve the encryption key from a dll file?
I have a dll file that makes an http post request to a webserver , request looks something like this :
UmdUsFrEB3wGMuuAz1Znywuedx6+...
0
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0answers
89 views
How do I decode or decompile this class It seems codes are encrypted?
I've used JD-Gui, Luyten and other couple of Java Decompilers but it's not working what is the problem in here? Thanks! It's A Mod (Minecraft) and I'm porting into different versions.
Code:
public ...
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1answer
58 views
Decompilation of CIL code into some high level code - do I need to introduce new variables during data flow analysis?
I'm writing a compiler from .NET CIL code to some high level language. Process is similar to decompilation. I have done some control flow analysis - detecting loops, ifs, and so on. In terms of data ...
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21 views
Decompiling PYC file gives “Embedded file name”
I have a PYC file (https://pastebin.com/raw/dcWfYZSV) and when I decompile using uncompyle6 I get https://pastebin.com/JqL7ZB0W
It says "Embedded file name" - stupid question but is that the ...
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0answers
46 views
Change PHP Function behaviour on a encrypted file
I have a PHP file that is encrypted with Ioncube. Searching on the internet I found one guy which has decoded it, but when I run the decoded file, the code behavior changes so I can't replace the ...
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31 views
ILSpy loads .NET with multiple assemblies. DotnetPeek/DNSpy/Telerik and .NET Reflector don't?
using ILSpy, I can load a .NET executable file that contains 5 .NETCoreApp modules. None of the other programs in the subject are able to do this. They don't recognize the EXE as .NET.
My first ...
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64 views
ghidra rename fails
With ghidra 9.2.1 (2020 dec 15) in a decompiled dll, I can rename a variable with L.
Sometimes (can't find a repro), when I rename a second local variable (it does not appear in listing/assembly), ...
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87 views
Right way to reverse a VM
I'm currently reversing a virtualized sample that uses a custom VM bytecode. After defeating the anti-disassembly tricks I'm finally faced with the vm_dispatch function. I have to figure out the ...
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1answer
570 views
How can I modify or decompile Hermes JS bytecode?
Since React Native 0.60.4 developers can opt-in to use the Hermes JS Engine. This generates an index.android.bundle binary that contains Hermes JS bytecode.
The Hermes documentation mentions hbcdump ...
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0answers
312 views
Reverse exe file compiled by pyinstaller
I am trying to get python source code from only exe file compiled by pyinstaller.
I used the pyinstxtractor.py and got extracted folder.
And then what or how should I do?
Or could you explain other ...
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1answer
129 views
How to deobfuscate Java application protected by Java Antidecompiler [closed]
Here is some infomation I found from MANIFEST.MF
Archiver-Version: Plexus Archiver
Built-By: boonb
Created-By: Apache Maven
Build-Jdk: 1.8.0_231
Main-Class: JavaLauncher
Modified-By: 9.4 (BIS Guard &...
0
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1answer
38 views
what means “ilegal use of registers”?
I read pe program using a Pe Reader to view all sections, the .text section starts is "0x0001000":
What is in the pe program reader:
And is this what i see on the debugguer :
2
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1answer
500 views
How to prevent Ghidra from removing unreachable blocks?
I am using this extension for loading PS-X executables:
https://github.com/lab313ru/ghidra_psx_ldr
During decompilation, Ghidra shows some of these warnings:
WARNING: Removing unreachable block (...
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1answer
126 views
how to infer data type in ghidra decompilation result
how to infer data type in ghidra decompilation result for /usr/bin/ls ?
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2answers
169 views
How to decompile /usr/bin/ls
How to decompile the following assembly instructions ?
Note: this could be reproduced using /usr/bin/ls binary inside ghidra
2
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1answer
1k views
Decompiling .pyc file to 0 byte .py file
i am doing the CTF-like challenges. One of these tasks need us to decompiling Python bytecode 3.8 (.pyc file) into py file. However, the py file that generated by pyc file is 0 byte
The original file'...
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1answer
62 views
Automatic decompilation from Assembly x86
Is there a tool to automatic decompile an assembly x86 code?
What I need is a tool where I simply paste my code and it returns C code.
Thanks
2
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1answer
189 views
Invalid file path error while trying to rebuild with apktool and aapt2
I am facing an error while try to repack an apk with apkool. below is the error trace.
W: error: invalid file path 'C:\Users\ccre\res\drawable2\abc_ic_search_api_material.xml'.
W: error: invalid file ...
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0answers
345 views
Ghidra wrong array size
I'm new to the field, so it's probably a stupid question, but when I tried to decompile this binary from picoCTF 2019 I got an array of size 4 (local_38) when looking at a solution it should be of ...
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1answer
84 views
How to decode a .plr file
I have a .plr file that contains all of the player information for the game Terarria.
I would like to decode it to have a look at what data is stored on this file so that I can play around with making ...
1
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1answer
176 views
Reverse Engineering Java - Deobfuscating symbols
I'm new to Java and working on cleaning up a fairly large Java .jar sample where the obfuscator has renamed symbols into invalid names. For example:
import org.lib.00.0.2;
public final class 90
...
0
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1answer
124 views
“check:” keyword in Ghidra
I have disassembled the crackme0x06 challenge (http://security.cs.rpi.edu/courses/binexp-spring2015 inside challenges.zip). It's an ELF 32bit unstripped binary. The decompiled C code using Ghidra ...
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1answer
346 views
How can I get classes from “protected” JAR file?
I'm trying to get classes from JAR file / actually running JVM machine but:
When I'm trying to open JAR file using for example 7Zip I dont see any classes. After unzip Manifest file is empty too.
When ...
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1answer
1k views
Decompiling Python Files: ValueError
So I have this python file and I successfully unpacked its content inside of it we have our file.pyc
I appended the magic bytes to it so it went from:
E3 00 00 00 00 00 00 00 00 00 00 00 00
to ...
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1answer
59 views
How to find where a subroutine is being called (ida)
I am reversing an application using IDA. I have found a small subroutine that returns information at the end of that subroutine. However I would like to see the subroutine that uses this small ...
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1answer
3k views
How to decompile obfuscated Python code?
I have an executable file, which I am trying to decompile. I have already deduced that it was originally programmed in Python. I know that it was obfuscated with PyArmor and possibly compiled with ...
1
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1answer
305 views
Need to decompile executable from Openwrt ELF 32-bit
what best tool to use to decompile executable from Openwrt image
ELF 32-bit MSB executable, MIPS, MIPS32 rel2 version 1 (SYSV), dynamically linked, interpreter /lib/ld-uClibc.so.0, no section header ?
...
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2answers
383 views
Methods for preventing IDA decompiler
I want to write a C function, such that hex-rays decompiler will fail on it. I want to do it for study purposes, and not for an actual anti-reversing method. Do you have any recommendations/approaches ...
0
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2answers
385 views
Hex-Rays skips code
have using IDA Pro 6.8 (Hex-Rays 2.2), default settings.
Problem starts happens when i trying to analyze function (which actual size ~2886 bytes), pressing F5 (without errors or alerts) and getting ...
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0answers
101 views
How can one replace bitmap (image) inside exe?
I have an application (something like a text editor) that has a background image.
I understand how to replace text in exe file, but what about image?
I wonder how difficult and what is the way to ...
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0answers
56 views
(Help) APK Decomplied unreadable .pngs
I decompiled an Android game APK to look at the source code / resources and the .pngs give me the error "It looks like we don't support this file format" when I try to view them in the Photos App. I'...
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0answers
671 views
Turning p-code generated by VBA (Visual Basic for Applications) back into VBA
According to the README in https://github.com/bontchev/pcodedmp :
"As each VBA line is entered into the VBA editor, it is immediately compiled into p-code"
"when you open the source of a macro ...
0
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1answer
200 views
Is there any decompiler, which can produce a compilable result?
I would like to decompile a 32bit linux executable to C, modify some parts of it, and then compile it back. I do not care if the C code is not pretty and really hard to maintain. The only thing I care ...
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405 views
How do I reverse this firmware? 8-bit handheld console
I recently bought this chinese console that supposedly has 328 8-bit games. I want to understand the code and how it works to hack it and maybe load other ROMs. It has a chip covered in black epoxy ...
2
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0answers
229 views
How should I got about working out the format for this psp game?
I have been attempting to reverse engineer a format for a visual novel psp game ('Mirai Nikki RE: WRITE - 13 Ninme No Nikki Shoyuusha') and I have come to the understanding that the format works as a ...
0
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1answer
680 views
Android Reverse Engineering Network Traffic Stack Trace
Lets say an Android application sends out a traffic out to the server and expects a Json Response
Request:
https://server:port/userid=user1&token=randomstring7345
We want to replicate the ...
2
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1answer
932 views
How to override c++ string class with LD_PRELOAD
i am trying to override predefined functions such as strcmp, getenv, etc.
i already override some of them using LD_PRELOAD options.
but i can't override string class, how can i override c++ string ...
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1answer
1k views
Decompile a DLL file from Microsoft Media Creation Tool
In this Superuser topic Windows 10 Media Creation Tool, how does it work?, it is possible to extract the URL from SetupMgr.dll. My question is, how do I extract this URL from SetupMgr.dll? I want to ...
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1answer
212 views
Reversing C# exe,Questions.Help
I am trying to debugging c# .NET application which receives a set of doubles and keep it as DataSeries every second.
I want to rewrite its dataseries before the new data comes with my own dataset.
...
5
votes
1answer
852 views
Erlang Source file generation from .beam file
I have Erlang application's beam files which I want to decompile.
Application is Compiled and build with 'debug_info' options. here is snippet of emake file to which is used to build application :
{...
3
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0answers
236 views
What tool is able to analyze/decompile asm execution trace?
I got a trace of the execution from x64dbg and I need to analyze it. The problem is that the trace is quite large and there are quite big chunks of the code that repeat (I assume they are loops).
I ...
1
vote
1answer
52k views
Can we decompile an .exe or .dll as %100? [closed]
Can we decompile a .exe or .dll file as 100%? Also sometimes seems some
mistakes on somewhere (like mainfrm.cs) , how can we fix that?
What is the best .NET decompiler? or What would you prefer?
I ...
0
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1answer
735 views
Reverse engineer the update-binary file in Android recovery update packages
I am trying to understand how to disassemble or at least get a readable copy of the update-binary file located in /META-INF/com/google/android/. It is a modified version for a smartwatch, which ...
0
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1answer
957 views
I'd like to ask about unpacking aspack 2.12
I've tried to unpack program packed with aspack 2.12 manually by ollydbg,by setting breakpoint at RETN 0c. However whenever I tried to dump with ollydump, it sends error message like "unable to read ...
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1answer
960 views
How to assemble back a disassembled ChunkSpy LUA?
Is it possible to assemble back the ChunkSpy's dissembled LUA files? Here's an example:
0B50 05000000 [001] getglobal 0 0 ; script
0B54 C63E0000 [002] gettable 0 0 ...
2
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1answer
4k views
Decompiling 64bit ARMv8 Android .so library
I know IDA Pro can disassemble them to assembly code, but are there tools to decompile 64bit ARMv8 Android .so shared libraries to C?
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0answers
490 views
Why is IDAPython decompiler API returning the same effective address for both the current item and its parent?
Following this blog post, I am writing an IDAPython code to traverse the AST generated by the decompiler in order to extract some information. I am providing both my AST, the Python code and the ...
0
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1answer
68 views
Decompiling or Feature to Help Reverse FPU Instructions?
I've been running into a lot of FPU instructions from an old program I am trying to reverse engineer. It tends to be rather difficult to reverse when there is a huge section of FPU instructions, just ...
0
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0answers
123 views
Reassemble function that has its control flow chopped so that it can be decompiled by IDA
I try to decompile a function that is obfuscated by having split
up the controlflow into asmblocks scattered around the .text section
and connected by "jmpq" jumps.
<func1>:
0: insn..
1: ...
1
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2answers
717 views
Dlink DIR 600M firmware decompile issues
How to decompile the CGI & ROM files from the firmware bin? I am able to extract the HTML files using binwalk but the router OS and CGI files are missing.
NOTE: Its not the same as DIR 600
...
