Questions tagged [obfuscation]
Concealing the nature of how things truly function or work.
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x86 - How do I detect virtualized code by looking at the assembly?
How can I detected virtualized code by say, vmprotect, obsidium or themida just by looking at the assembly code? I know that just looking at the PE section name would help, but I wanted to detect ...
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Which encryption returns 192 hash value it means 96 in bytes?
I am reversing an APK and there is a signature that needs to be found.
The function from where the signature is generated is present in the .so file.
I did small debugging. While doing it, the ...
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How to deobfuscate Java application
Hi i am unable to deobfuscate the Advanced String Obfuscation Jar on tryHackMe
I tried
dumping the classes using a dumper javaagent
deobfuscate the jar with java-deobfuscator
threadtear functions
...
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How to keep track of Dynamic Variables
The thing I'm trying to reverse has a lot of variables on allocated memory so I can't comment and keep track of the addresses as every time I re-run the software they will be different..
I'm working ...
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Confusing objdump with data as code
I am trying to confuse objdump to solve the first exercise of chapter 6 in Practical Binary Analysis. Admittedly I am super weak with inline assembler but I made a best-effort attempt and tried to get ...
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Fixing/recompiling a heavily control flow obfuscated function
I've recently come across a binary that has been obfuscated with a very obscure protection.
Obfuscation
From what I understand, the obfuscator is effective in several ways.
Multiple JMPs via relative ...
user29468
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How to disassemble an obfuscated .NET DLL?
I asked earlier about unpacking a packed .NET exe. But now I need to see the source code for an obfuscated DLL:
Any idea how to unpack it?
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How can I connect basic blocks seperated by unconditional jmps?
I'm analyzing an obfuscated code which splits its code into multiple blocks seperated by many, many unconditional jmps. Here is a picture of what the obfuscation looks like:
I wrote an IDAPython ...
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How can I reverse this python code (obfuscated by b64, gzip and many more)
How can I Deobfuscate this python code
Link to code
I tried to replace eval places by print. but it won't work and output is also obfuscated
Head of the code looks like this
can anyone please help me
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devirtualize? or what is this obfuscator? and how to get rid of this
from previous question i still dont get any info or any process at all... now i asking again with this question is this virtualize code or something? i try many thing and it still didnt work [i unpack ...
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Is there a way in ida pro to see the address where I have explicitly marked them as code or data, etc?
I'm analyzing an obfuscated binary. IDA did a pretty good job of doing the initial auto-analysis. Later, I went through and marked some sections as undefined, or code, etc. Now IDA can't re-create ...
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new to malware analysis and disassembly. dotpeek has been helpful. is this unreadable code due to SuppressIldasmAttribute?
just getting into rev engineering malware. i want to get to source on my own. i could use run.any or VT but that's no fun. any reason why this is unreadable the way it is? is it due to the module ...
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What are the way I can reverse engineer an obfuscated C++ program?
I am reverse engineering an program. I encountered a problem where I can't reverse engineer it as the program code is obfuscated. I realised the program is obfuscated thanks to my friend who noticed ...
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Best way to protect source code of exe that being loaded by Assembly.Load method
I am protecting an exe that being loaded by Assembly.Load... This makes everything difficult because most obfuscators causing it to not work properly or not load at all. I used confuserEx Ameteurz ...
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What is the obfuscation method utilised in Playdead's 'LIMBO' video game?
The game uses Unity3D engine, perhaps with a custom render pipeline. Reports have been made, it is not possible to disassemble it. How did they achieve that?
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Methods to alert inappropriate use of JS code
Let's say we have a JS code library that is not for sale, just internal. Of course, anyone who can access the website will be able to download that and reuse it.
To avoid others to reuse that library, ...
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Wave File obfuscation
I have this file here, that is supposed to be a wave audio file, but seems to have some obfuscation applied to it. The file header is here: https://pastebin.com/LD5aA1EG Any suggestions where else ...
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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 ...
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Virtual machine code obfuscation implementation details
I want to implement a VM based simple proof-of-concept obfuscator. It should take an exe file as input and produce a new pe file with appended vm section. For simplicity let's say the exe file is ...
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Trying to replicate encryption of an android app
I was trying to replicate/copy the encryption of an android app which uses CryptoJS with sha256 encryption as having seen in the source code of the android app. fingerprinting the app, it was built ...
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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
...
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How to call strongly encrypted DLL from Resources?
There is a program. This program accepts plugins. Plugins written with C#. I have to encrypt it. But when I use strong obfuscators I have exception. Program doesn't read. How can I fix that ? How can ...
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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 ...
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De-obfuscate JS code [closed]
I came across a script that converts font files from one type to another (i.e. WOFF to TTF, etc).
I would like to understand it and incorporate some of the code into a personal project. The script ...
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Dealing with heavily obfuscated Java, possibly on bytecode level
I've got a jarfile from a friend, he told me to put it thru an decompiler. So I did, but:
JD-GUI basically spit out just the imports and didn't show any class data
CFR dumped out stack trace on ...
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Stack-pointer analysis failed
I'm testing my toy obfuscating C compiler against IDA's decompiler, but IDA refuses always functions (then the decompilation is not possible). For example, at one of lowest-levels of obfuscating, a ...
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Python self decryption script, as mean of obfuscation
I have a software with an embedded python interpreter. The software can open upon startup a given .py script and execute it. Let's assume that in my python environment I can't open other files, and I ...
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Is it possible to completely reverse this code?
i have this code i'm trying to deobfuscate
https://pastebin.com/g5mHpWE4
I used
https://beautifier.io/ and
http://www.jsnice.org/
but the result is still not good, current code:
https://pastebin.com/...
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Error After de4dot - Application Does Not Start
There is an application that has been obfuscation to learn. So in an unpack me style. In the first stage I would unpack with de4dot. After you unpack, the running application stops working.
dump and ...
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Possibly infected image
Long story short I'v downloaded a template for my website and instead of images it has the .html files included, and at the beginning those html files do include PNG IHDR , and they are being loaded ...
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Static analysis obfuscated code
I'm reversing a code that is heavily obfuscated. It uses opaque predicates, call stack tampering, junk code and control flow flattering.
Call stack tampering uses indirect branches (push register / ...
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Best way to protect source code of .exe program running on Python?
I am developing proprietary software that would be distributed in a form of .exe file. In order to use it, users will have to authenticate with their whitelist credentials (username + password).
The ...
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API Hiding Issue
I'm trying to analyze a malware which is hiding API names. When I open it with CFF Explorer, except a few API like GetProcAddress, nothing appears. Basically, I know how API hiding works. I set a ...
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J2ME games obfuscator - Spyro and Tekken 5
While reversing some J2ME games like Spyro or Tekken 5 Mobile I have encountered a weird obfuscation where all fields, methods and classes have names like A, a, B, b, Aa, Bb etc.
It's really hard to ...
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Trace Method Calls in .NET/C# Binary
I have a heavily obfuscated Windows service binary. Fields, types and methods are renamed. While it is possible to decompile the binary using dnSpy, it is still very cumbersome to identify important/...
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Obfuscate JSON file that is served client-side
Through some research I have found that obfuscation won't block hackers from retrieving your .json file, but I'd like to have at least a level of obfuscation that deters some people. I ran into a npm ...
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Mysterious chunk of code in IOLI crackme0x06 challenge
I've been struggling to understand a very strange piece of x86 assembly code from the IOLI crackme0x06 challenge.
Context
But first of all, here is the context : I've successfully cracked the ...
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How to choose a .NET software protector which will have a small impact on run-time performance speed? [closed]
I am writing a .NET software which is doing calculations and drawing in real-time i.e when the user is moving the mouse. I want to protect this software from being reverse engineered and restrict its ...
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How to deobfuscate native Android library obfuscated with OLLVM?
When I load the binay in IDA, all I can see are loads of .datadiv_decodeXXX... functions and this is because of OLLVM. I know it is possible as a Chinese article I found said they were able to ...
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Does a symbolic disassembler exist?
I would like to know if there are disassemblers based on a symbolic analysis, I'm beginner in RE, but I think that a disassembler based on symbolic techniques can be very interesting and could ...
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Jump in the middle trick
I'm reversing a program that "hides" some instructions using the jump in the middle trick. This trick is a jump to a middle of an instruction, whereas the real address actually contains another opcode....
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What's this obfuscation technique?
I'm reverse-engineering a particular dylib on Mac OS X. The dylib is highly obfuscated, but I suspect it's from some well-known technique that I'm not aware of.
I'd like to describe it in the hope ...
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Simplifying assembly
I'm analysing some binary trace, it's pretty much obfuscated. What I need to do is to understand work flow of its alghoritms. However I cannot find any reliable tool which would help me with that.
I ...
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Analyzing and deobfuscating complex JS code [duplicate]
I am looking to reverse engineer a very ugly piece of JS found here.
As far as I can tell, this script generates and sets some cookies on my browser that identify it on the site. Deobfuscating it ...
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561
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C# Hidden Method through transparent proxy object?
I'm dealing with an interesting form of obfuscation. A C# program I am reversing has a central API, let's call it "Central API". This Central API has several functions that aren't exactly defined.
...
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Why do obfuscators remove line numbers, and can I safely leave them in?
Application security engineer here. When we compile our java code, we obfuscate it using KlassMaster and have it remove line numbers (see KlassMaster docs) because of a handwavy explanation "it makes ...
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What is the difference between stripped binary and obfuscated binary
I want to know the difference between stripped binary and obfuscated binary.
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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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Obfuscated code analysis - can unused variables be ignored?
I am analyzing a malicious javascript. The code is encoded and obfuscated in a way that I did not manage to even partially deobfuscate yet and it is filled with long strings. In order to simplify the ...
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Missing Map from Java Native Method to C Code
When writing a C implementation for a native Java method in Android, the rule is to name the C function according to the convention "Java_com_...". But I encountered an APK in which there are no such ...
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