Questions tagged [deobfuscation]

Techniques to remove obfuscation from a piece of program.

34 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
5
votes
1answer
1k views

Understanding AutoIT “compilation”

I'm trying to de-compile a cheat created for my game so I can fix it. The problem is the version used is 3.3.14.2 which no longer has official de-compiler support. I have tried looking for 3rd party ...
3
votes
0answers
723 views

Deobfuscate PHP that contains - goto

I've found a bunch of obfuscated PHP scripts in my server but it seems I cannot deobfuscate them to follow the code flow. I came to the conclusion that the files have been obfuscated with https://www....
3
votes
1answer
614 views

Reversal of unknown obfuscation or encryption with known plaintext

Introduction For academical reasons I am reversing a firmware for an embedded device. I have already created a perl script which is able to parse the firmware structure and extract files from it (its ...
2
votes
0answers
132 views

How can I practically approach VM-obfuscated code with symbolic analysis/execution?

Dealing with VM-obfuscated code and started learning about symbolic analysis but having a hard time wrapping my head around how to practically apply it to a problem. If someone can give me some ...
2
votes
0answers
42 views

Reverse engineering hidden audio track in this MPEG-1 video file?

No matter what video player or video analysis software I throw this video at, neither are able to reproduce or detect the audio track of the video: Introduction video of Wipeout XL PC version (...
2
votes
0answers
88 views

How to reverse engineer an exe built using nexe?

I am working on an express application. I obfuscate the source code using javascript-obfuscator. I am using nexe cli for generating a single exe from the obfuscated code. Can anyone tell me if there ...
2
votes
1answer
438 views

De-obfuscating code ran through JScrambler 3x via Eval() functions

I am relatively new to JS and de-obfuscation in general and I am having difficulties reversing some complicated JS. I know the code itself is obsfucated via jscrambler 3-4x and therefore is ran ...
2
votes
0answers
1k views

How to decompile a obfuscated mach-o dylib?

I am trying to decompile a dylib called libConfigurer64.dylib, which is loaded from the environment variable "DYLD_INSERT_LIBRARIES" I want to analyze what it really does, so I dragged it in to IDA,...
2
votes
0answers
2k views

Tool for JavaScript deobfuscation

I'd like to reverse engineer a JavaScript program by manually renaming minimified variable, parameter and function names. However, updating my reverse-engineered code to a newer version would be very ...
2
votes
0answers
982 views

Do any known deobfuscateors work on Agile.net 6.4?

As a company we are going to start obfuscating our released binaries, so far the best front runner we have found has been Agile.net 6.4. I took one of our binaries we obfuscated with the trial ...
2
votes
0answers
556 views

find CRC algorithm, having some input and output data pairs

I'm trying to discover the algorithm of a lost software, there is an equipment that requiest some data, and validates the data using the "KEY", if you change any parameter of the data then you need a ...
2
votes
0answers
178 views

Javascript equivalent of JEB

In case you already know, there is a full-feature decompiler for Java/Android called JEB (https://www.pnfsoftware.com/) Some of the most important features include the ability to rename identifiers ...
1
vote
0answers
35 views

How To Deobfuscate ConfuserEx .NET Assembly?

No matter what I try I cannot deobfuscate this crackme https://crackmes.one/crackme/5d6c847433c5d46f00e2c390. I have tried each & every tutorial on youTube of which this one is the best https://...
1
vote
0answers
68 views

Looking for obfuscation patterns within jumps

I'm working on an obfuscated binary. I recognized some patterns used to confuse the disassembler, some used to obfuscate function calls, some other for conditional jumps and so on. The idea was to ...
1
vote
0answers
181 views

Reversing PyArmor + Pyinstaller

Created an application, protected by PyArmor and used pyinstaller. I'm trying to reverse engineer it. So far I've decompiled the exe into pyc files but it's still pyarmor encrypted I can only see the ...
1
vote
0answers
67 views

Guidelines for dealing with obfuscated code

I have taken a deep dive into reversing software with IDA, I used Ghidra before. I have already solved a couple of basic crackmes now I have targeted another one which's code is obfuscated, also has ...
1
vote
0answers
110 views

How to use Ghidra to work with VM obfuscated binaries?

By "VM obfuscated binary", I mean a binary that contains one or more implementations of a VM internally, and also some bytecode that can run on this VM. One of the reasons why this binary is this way, ...
1
vote
0answers
42 views

Main contemporary deobfuscation techniques

Could you please specify in a few words main contemporary deobfuscation techniques which we can apply to 32/64 bit PE files? For example, (1) using instruction templates, such as: mov edx, 5B1F04F1h ...
1
vote
0answers
147 views

What is the header 'X-Goog-Spatula'?

I am blackboxing an android app to write an API for it. Many of the HTTP requests sent include a mysterious header with the name X-Goog-Spatula. If I do not include this structure, the request is not ...
1
vote
0answers
1k views

Can de4dot deobfuscate Dotfuscator Professional?

I ran de4dot on a Xamarin app obfuscated using Dotfuscator Professional. However, there's still the random switches and strange ints everywhere. Can de4dot decode this? If not, is there another tool ...
1
vote
0answers
559 views

Decode RubyEncoder

I was trying out some things when I came across some RubyEncoder encoded code. After searching the web, I found basically nothing useful on how to reverse them (Except this and [this][2], but I had no ...
1
vote
0answers
988 views

de4dot and Dotfuscator: IL looks different, not DotPeek decompiled code

From the obfuscated to the deobfuscated assemblies, IL code looks different using ILDASM; however, DotPeek decompiled C# code looks exactly the same for both. Any clue why? The obfuscation software ...
1
vote
0answers
325 views

Discovering byte array obfuscation function

I'm in the middle of reverse engineering SafeNet (formerly Rainbow) iKey 1000 USB dongle protocol, in order to create Linux driver for it. I'm using Windows as guest in virtual machine on Linux host ...
1
vote
1answer
928 views

Suspicious obfuscated javascript file

This question is related to another question made on StackOverflow. The users asks about a unknown JavaScript file which is being loaded on his website. I managed to unroll a bit of the JavaScript ...
1
vote
0answers
1k views

How to send and render an .html for chromecast using RAW http requests?

I am trying to RE the chrome cast protocol. I saw Koushik Dutta did RE the protocol, but didn't find any post online analyze the protocol. Moreover Google changed it a little bit since then. ...
0
votes
2answers
42 views

Decode xor data in IDA

I have code that looks like this: byte_100031BA4 = v41; byte_100031BA5 ^= 0x3Eu; byte_100031BA6 ^= 0x47u; LOBYTE(a1) = -9; byte_100031BA7 ^= 0xF7u; byte_100031BA8 ^= 0xA9u; byte_100031BA9 ^= 0xE8u; ...
0
votes
0answers
270 views

Reversing Pyarmor Discussion

Anyone messing around with pyarmor recently? For those of you that are unaware of what pyarmor is, its a protection software that is to help obfuscate and protect your software. Heres an image of what ...
0
votes
0answers
97 views

Cannot detect obfuscator of executable C#

I have an obfuscated exe file writen in c#, which I want to deobfuscate. In dnSpy I can see this de4dot said unknown obfuscator, tried to deobfuscate with some result which looks on dnSpy the same (...
0
votes
1answer
105 views

Reverse Engineering Javascript - Out of Memory

I found this javascript file on one of those online movie streaming services and was interested in finding out what it does. However, after trying many deobfuscators I am still stuck. A major ...
0
votes
0answers
302 views

How does ConfuserEx work and what to look out for?

I wanted to learn how to crack some .NET obfuscated programs and I'm wondering how does ConfuserEx (since that seems to be the state-of-the-art) work? What do I have to look out for and why? What ...
0
votes
0answers
60 views

Output address path during .exe execution

I have an obfuscated software. I'm a beginner in this area, so I don't find where a patch would be useful for what I want to do. It turns out that I have an idea of how I could find out in which ...
0
votes
0answers
945 views

How to detect obfuscator (de4dot shows: Detected unknown obfuscator)

Generally, I use de4dot to detect obfuscator or deobfuscate. But some files are protected as they show: Detected unknown obfuscator What are ways to detect the obfuscator of .exe?
0
votes
0answers
115 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: ...
0
votes
0answers
273 views

How to pass Obfuscated Elf binary to gcc optimization end

Currently I have a 2000+Line function to reverse engineer with many redundancies and appears to be obfuscated. It their a way to pass to pass this binary to gcc or clang to reassemble it and optimize ...