Questions tagged [deobfuscation]

Techniques to remove obfuscation from a piece of program.

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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
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0answers
804 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....
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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 ...
3
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1answer
638 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
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0answers
139 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
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0answers
155 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, ...
2
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0answers
46 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
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0answers
116 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
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1answer
530 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
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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
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0answers
1k 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
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0answers
559 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
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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 ...
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0answers
182 views

Deobfuscating Unknown C# obfuscator?

Hello, I am having an exe file that I am trying to deobfuscate and debug using dnspy. The exe file was written in C# and obfuscated with unknown deobfuscate according to de4dot! I tried to all my ...
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54 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://...
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0answers
78 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 ...
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0answers
378 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 ...
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83 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
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0answers
44 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 ...
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188 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 ...
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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 ...
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0answers
588 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 ...
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0answers
1k 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
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0answers
332 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 ...
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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
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1answer
75 views

How can I de-obfuscate a VBScript (.vbs) file?

I have a VBScript (.vbs) file that is a malware dropper. It executes correctly in a commercial malware sandbox. but does not act the same in my manual analysis lab, and I need to figure out why. The ...
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17 views

IDA, wrong jmp operand after patching

I'm writing a python script for IDA to automate the deobfuscation of a binary. After patching with a jmp instruction ida provides the following disassembly: .text:008FD01E jmp ...
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45 views

.NET - What kind of obfuscation is this?

I'm currently performing some malicious DLL malware analysis, and I'm having some issues figuring out how to de-obfuscate this particular sample. It uses a lot of Reflective Assembly calls, and, a lot ...
0
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2answers
69 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; ...
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0answers
1k 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 ...
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193 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
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1answer
134 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 ...
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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
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0answers
1k 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?
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118 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
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0answers
286 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 ...
0
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1answer
982 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
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1answer
50 views

How to deobfuscate Java application protected by Java Antidecompiler

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 &...