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Challenge of Reverse Engineering

Try a challenge or contribute your own, any platform or operating system...

The creation of new topics is disabled in these subforum categories.

Please create and post your new challenges in the appropriate subcategory of Downloads > Challenge of Reverse Engineering

A topic will then automagically be created and posted in these forums...

  1. Teddy Rogers

    Example CrackMe - Debug Blocker x64

    CrackMe · Started by Teddy Rogers,

    Example CrackMe - Debug Blocker x64 This is an example for submitting a CrackMe in the Downloads section of the site. You can download the file and run Debug Blocker x64. Nothing too exciting will happen! The challenge here would be to patch the debug-blocker function so that it does not spawn a second process. File Information Submitter Teddy Rogers Submitted 02/23/2020 Category CrackMe View File

    • 3 replies
    • 13.3k views
    ra1n
    ra1n
  2. cipsi

    ConfuserEx 1.6.0

    UnPackMe (.NET) · Started by cipsi,

    ConfuserEx 1.6.0 Public key sample protected using ConfuserEx 1.6.0. https://github.com/mkaring/ConfuserEx/releases/tag/v1.6.0 Your challenge is to unpack and decompile the file. File Information Submitter cipsi Submitted 02/04/2023 Category UnPackMe (.NET) View File

    .hloire
    .hloire
  3. weston2337

    FujiFuscator

    UnPackMe (.NET) · Started by weston2337,

    Difficulty : (3-4 Maybe?) Language : (C# .NET) Platform : (Windows) OS Version : (Windows 10) Packer / Protector : (FujiFuscator) Description : Please give me a detailed tutorial on how you unpacked this. Screenshot : UnPackMe.exe

    .hloire
    .hloire
  4. boot

    VMProtectDDK v3.84 x64 No.2 2024

    CrackMe · Started by boot,

    VMProtectDDK v3.84 x64 No.2 2024 If you want to try this challenge, please read the following text descriptions: 1. Please try to debug the kernel driver in the virtual machine instead of your real machine to avoid causing a blue screen on the physical machine a. Why blue screen? For things like Ring0.sys, as I mentioned earlier b. Copy the Tuts4you.ini file to the C:\Windows\ directory of the virtual machine 2. I have added a test signature to the driver, so to load this driver, you need to enable Windows test mode a. Press and hold the "WIN+R" key to launch the CMD console as an administrator, enter bcdedit /set testsigning on b. Res…

    hydradragonantivirus
    hydradragonantivirus
  5. Sh4DoVV

    Nuitka 2.1.5 (Python 3.11)

    CrackMe · Started by Sh4DoVV,

    Nuitka 2.1.5 (Python 3.11) Hi Nuitka compiled python 3.11 file Correct password doesn't important Just patching Thanks File Information Submitter Sh4DoVV Submitted 04/18/2024 Category CrackMe View File

    hydradragonantivirus
    hydradragonantivirus
  6. Fr4x

    Unpack Challenge (Agile.NET)

    UnPackMe (.NET) · Started by Fr4x,

    Language : C# .Net Platform : Windows x32/x64 OS Version : All Packer / Protector : Agile.Net v6.6 Description : Hi everyone, hope one of you friends can unpack the target and teach us how to unpack it Screenshot : Secured.rar

    extonoxt
    extonoxt
  7. whoknows

    Eazfuscator.NET v2025.01

    UnPackMe (.NET) · Started by whoknows,

    Eazfuscator.NET v2025.01 File protected by eazfuscator v2025.01 having Code Virtualization enabled. Find registration combination and reply it with the success message! File Information Submitter whoknows Submitted 07/22/2025 Category UnPackMe (.NET) View File

    whoknows
    whoknows
  8. lovejoy226

    The Enigma Protector x64 v7.4 (HWID Lock)

    UnPackMe · Started by lovejoy226,

    The Enigma Protector x64 v7.4 (HWID Lock) Two simple Win x64 GUI applications protected using Enigma x64 v7.4. Challenge is to; bypass the hardware ID lock; unpack the application. Let us go together to solve this issue. File Information Submitter lovejoy226 Submitted 06/17/2024 Category UnPackMe View File

    ianything
    ianything
  9. lengyue

    Enigma Protector v7.5（Shell 示例）

    UnPackMe · Started by lengyue,

    This is an Enigma Protector_7.5 shell sample, whether it is Unpack, PatchHWID, or KeyGen, as long as it can successfully bypass registration, it is sufficient. Welcome friends to test, Using hardware ID encryption without popping up a registration box when changing computers, I think this one machine, one code solution is very challenging，I don't check anti virtual machine, but it cannot run on a virtual machine, which I find somewhat unbelievable..thank you. Insufficient forum member permissions, unable to post to the reverse challenge area. Sorry Name: tuts4you HWID: C16BF-8E2CA-FF15D-2CE16 KEY: BA23FLLESM75MTHXKU3Z8JNA3VJWLKCSZWV3PS76NAMJK5D3MRQ5ZYJ5ZPE9EKA…

    ianything
    ianything
  10. yutijang

    AutoIt Custom Packer (Extract Image Files)

    CrackMe · Started by yutijang,

    AutoIt Custom Packer (Extract Image Files) Hello everyone, I'm a AutoIt developer, and I've created a small portable program that uses a custom packer to protect some assets. The program is written in AutoIt and consists of two files: M-Dl.exe and assets.zip. I'm looking for skilled reverse engineers to test the security of my custom packer. The Goal: The challenge is to extract the image files that are contained within the custom packer. I've designed the packer with my own security techniques and would love to see how it stands up against the community's expertise. Repository & Download: You can find the project repository on GitHub, including …

    yutijang
    yutijang
  11. CodeExplorer

    [unpackme] Agile.NET unpack me

    UnPackMe (.NET) · Started by CodeExplorer,

    [unpackme] Agile.NET unpack me Agile.NET 6.2.0.16 AgileNETUnpackMe.zip

    extonoxt
    extonoxt
  12. whoknows

    .NET Reactor v7.3 (Embedded DLL's)

    UnPackMe (.NET) · Started by whoknows,

    .NET Reactor v7.3 (Embedded DLL's) File protected by .NET Reactor v7.3 having Code Virtualization enabled. By nature the application using Dependency Injection (this time heavily developed), the 3rd party files embedded to main exe (see shot2), in addition System.Data.SQLite.dll lying near application. Find registration combination and reply it with the success message! Custom antidebugger File Information Submitter whoknows Submitted 06/26/2025 Category UnPackMe (.NET) View File

    Rextor
    Rextor
  13. Gladiator

    VSEC KeygenMe #2

    KeygenMe · Started by Gladiator,

    VSEC KeygenMe #2 VSEC KeygenMe #2 What you have to do: I hope peoples who interested in Reverse Engineering learns something from this type of challenges. Best Regards. File Information Submitter Gladiator Submitted 02/07/2025 Category KeygenMe View File

    iced
    iced
  14. Inx

    0x7 Protector (Beta)

    UnPackMe (.NET) · Started by Inx,

    0x7 Protector (Beta) I would like you to test the obfuscator I am still working on developing. The goal is to unpack the file and provide your unpacking method. https://www.virustotal.com/gui/file/965c96b4e7a431635ab9f450cb89784791aec2eec27a204e195dece2fcce5f36?nocache=1 File Information Submitter Inx Submitted 11/11/2022 Category UnPackMe (.NET) View File

    VB56390
    VB56390
  15. JeRRy

    [crackme] CrackMe (VMP)

    CrackMe · Started by JeRRy,

    If you successfully cracked it , then you will see this Rules Only patch or cracked EXE is allowed. No keygen No serial fish />http://www.multiupload.com/O7MR1DZ38N Good luck . CrackMe.rar

    iced
    iced
  16. X0rby

    VMProtect v3.8.1 Ultra (Mutation + Virtualization)

    UnPackMe · Started by X0rby,

    VMProtect v3.8.1 Ultra (Mutation + Virtualization) The target is an old software (from 2010) coded in c++, I just apply the VMP protection without any special code as I show in the two screenshots. All available protection features in VMProtect were used with this unpackme. Refer to the attached images for the specific protection settings used. Challenge is to unpack the file, providing an explanation and details on your methodology. File Information Submitter X0rby Submitted 04/17/2023 Category UnPackMe View File

    etness
    etness
  17. boot

    VMProtect x64 v3.6 HWID Lock (All Protection Options)

    UnPackMe · Started by boot,

    VMProtect x64 v3.6 HWID Lock (All Protection Options) Unpackme x64 - VMProtect 3.6 HWID License (All Protection Options) VMP x64 SDK + HWID Lock +etc... WwW.Tuts4you.CoM https://forum.tuts4you.com/ If you can unpack it, please make a tutorial... I will mark the answers with tutorials as a solution. The compressed package includes a simple MP4 display, please pay attention to check... Created by boot / From Tuts4you 2023.06.21 File Information Submitter boot Submitted 06/21/2023 Category UnPackMe View File

    iced
    iced
  18. Modify

    AgileDotNet 6.4.0.23

    UnPackMe (.NET) · Started by Modify,

    Difficulty : 3+ Language : .NET Platform : Windows OS Version : Windows 7 and up Packer / Protector : Agile.Net Description : Protect with 90% feature, Good Luck Screenshot : DotNetV0.1.7z

    extonoxt
    extonoxt
  19. senzuuu

    VMProtect HWID CrackMe

    CrackMe · Started by senzuuu,

    VMProtect HWID CrackMe I have put all important information in HWID-License.txt. I hope you all come up with some fascinating solutions. If you want leave the solution and also if you want to show off you can do that as well! File Information Submitter freddy Submitted 02/06/2025 Category CrackMe View File

    iced
    iced
  20. whoknows

    .NET Reactor v6.5.0.0

    UnPackMe (.NET) · Started by whoknows,

    .NET Reactor v6.5.0.0 Try to unpack or alternatively provide a serial. Protections used: Necrobit Antitampering Antidebug Obfuscation Code Virtualization + Shield with SNK Whats new in .NET Reactor [6.5.0.0] 12-Nov-2020 Fixed 'Code Virtualization' issue New 'Anti Tampering' approach and more.. File Information Submitter whoknows Submitted 11/28/2020 Category UnPackMe (.NET) View File

    dotdll
    dotdll
  21. casualPerson

    crackme123

    CrackMe · Started by casualPerson,

    crackme123 A "Crack Me" challenge created by lord "Voksi" , a well known person in the "warez" scene. And no, this challenge is not uploaded by "Voksi" himself, it's uploaded via a proxy which is myself, an old friend of "Voksi" . GOAL: Obtain the Correct key Greetings to MasterBootRecord, Voksi, FJLJ, And also a few others, you know who you are ❤️ File Information Submitter casualPerson Submitted 07/04/2025 Category CrackMe View File

    casualPerson
    casualPerson
  22. musava_ribica

    Python Obfuscated KeygenMe

    KeygenMe · Started by musava_ribica,

    Python Obfuscated KeygenMe I have provided a zip archive which contains two .py files, as seen in the screenshot. In LicenseChecker.py there is a validation function invoked by main.py where you put the key in the given format. The python code is obfuscated using a obfuscator I'm currently working on. If you solved the challenge, or have any feedback to give, or need hints/help with reversing without spoiling, please let me know. Thanks. You can see original source code and the solution in the 'Authors Code' and 'Authors Solution', if you wish. Good luck! File Information Submitter musava_ribica …

    extonoxt
    extonoxt
  23. whoknows

    Eazfuscator.NET v2025.1

    UnPackMe (.NET) · Started by whoknows,

    Eazfuscator.NET v2025.1 File protected by Eazfuscator.NET v2025.1 having Code Virtualization enabled. By nature the application using Dependency Injection, the 3rd party files embedded to main exe. Find registration combination and reply it with the success message! Codebase improved a little bit versus reactor73 target. File Information Submitter whoknows Submitted 06/23/2025 Category UnPackMe (.NET) View File

    whoknows
    whoknows
  24. whoknows

    .NET Reactor v7.3

    UnPackMe (.NET) · Started by whoknows,

    .NET Reactor v7.3 File protected by .NET Reactor v7.3 having /Code Virtualization/ enabled. By nature the application using /Dependency Injection/, the 3rd party files embedded to main exe (see shot2). Find registration combination and reply it with the success message! File Information Submitter whoknows Submitted 06/21/2025 Category UnPackMe (.NET) View File

    Ben_Dover
    Ben_Dover
  25. lovejoy226

    Safengine Licensor v2.4 (HWID Lock)

    UnPackMe · Started by lovejoy226,

    Safengine Licensor v2.4 (HWID Lock) I coded a simple Win x64 GUI application with a close button and protected it using Safengine Shielden v2.4. Challenge is to; bypass the hardware ID lock; unpack the application. Let us go together to solve this issue. File Information Submitter lovejoy226 Submitted 06/11/2024 Category UnPackMe View File

    Fatmik
    Fatmik

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