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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

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  1. Alex0
    CrackMe · Started by Alex0,

    Hard CrackMe (LeetFuscator) Language: C#(.Net) Goal: to get the key of obfuscated file Key on the screenshot is wrong, you have to crack this CrackMe and send key with tutorial on how did you do that. File Information Submitter Alex0 Submitted 07/01/2021 Category CrackMe View File

  2. AarJee
    UnPackMe (.NET) · Started by AarJee,

    .NET Reactor v6.9 File packed with .NetReactor 6.9 -- All options File Information Submitter AarJee Submitted 07/19/2023 Category UnPackMe (.NET) View File

  3. SuperJackAbcd
    KeygenMe · Started by SuperJackAbcd,

    Simple C++/CLI Mixed Assembly KeygenMe Your goal is to create a keygen and make a tutorial and/ or write instructions about the steps done by you. What is C++/CLI? C++/CLI is C++ support .NET framework to make managed application run on .NET framework. https://en.wikipedia.org/wiki/C%2B%2B/CLI Feel free to post your solutions. File Information Submitter SuperJackAbcd Submitted 02/05/2022 Category KeygenMe View File

  4. lovejoy226
    KeygenMe · Started by lovejoy226,

    MD5 Hash Keygenme This is a simple MD5 Hash keygenme. It is protected with the themida. File Information Submitter lovejoy226 Submitted 02/11/2025 Category KeygenMe View File

  5. DefCon42
    UnPackMe · Started by DefCon42,

    Language : C++ Platform : Windows OS Version : Windows 10 Packer / Protector : Themida 3.0.3.0 Description : Looks like Oreans just dropped Themida 3. They've been working on the beta version for more than a year and just announced the initial release, so I'm praying I don't get my personal license revoked :^( Strings are (supposedly) virtualized then encrypted. The main protection is starting at VM_DOLPHIN_RED, though other VMs can be requested. Unpack/devirtualize the file. Screenshot :  Themida Crackme_protected.exe

  6. Gladiator
    KeygenMe · Started by Gladiator,

    VSEC KeygenMe Simple Code Virtualization KeygenMe ( Not Commercial VM ) Try to find Algorithm and make correct key It's not too hard Your opinions about VM Complexity are welcome. Thanks File Information Submitter Gladiator Submitted 02/04/2025 Category KeygenMe View File

  7. Leopar36
    UnPackMe (.NET) · Started by Leopar36,

    ByUndefined Protector + Enigma ByUndefined Protector + Enigma Anti Debugger Anti Dump Anti Tamper Anti ILDasm Resources Compress String Encrypt ControlFlow Virtualization Purpose: You need to patch or unpack the correct key. File Information Submitter Leopar36 Submitted 01/23/2025 Category UnPackMe (.NET) View File

  8. GIV
    UnPackMe · Started by GIV,

    Difficulty : 3 Language : Delphi Platform : Windows X86 OS Version : XP and above Packer / Protector : Enigma Protector 5.2 Description : Small unpackme for you guys to try. Screenshot : Enigma Protector 5.2 unpackme.rar

  9. SaggingCoder
    UnPackMe (.NET) · Started by SaggingCoder,

    Difficulty : 7 (I think) Language : .NET Platform : Windows OS Version : Windows 7 and up Packer / Protector : eazFuscator 2018.2 Description : Hello, here I am again 👋. After last and first attempt in the KeygenMe-Section, I tried to put more attention on packing my code harder. I've tried to understand and mod the open source obfuscator ConfuserEx but never got the result I was anticipating. (All the unpackers unpacked them with ease no matter what I added/changed 🙄). So I shifted my attention towards the commercial obfuscators and oh boy the pricing on these.... I've tried NetGuard, Babel, NetReactor,.. and so on. On some of these there were still vir…

  10. CodeExplorer
    UnPackMe · Started by CodeExplorer,

    Themida x32 v3.0.4.0 One of my tool (CompareInfo v3) protected by Themida x32 v3.0.4.0. File Information Submitter CodeExplorer Submitted 04/01/2023 Category UnPackMe View File

  11. virtualguard
    UnPackMe (.NET) · Started by virtualguard,

    VirtualGuard v1.0 This file is protected by the first version of VirtualGuard. VirtualGuard is an obfuscator I develop that I am trying to receive some stress testing on I hope this VM makes people think at least a little bit; It's fairly close to 1:1, however I do believe I do some interesting things with comparisons and branching. Haven't seen it anywhere else. Let the record state this is not a "mod" of any other vm, so if you are interested in seeing some new stuff this is for you. This sample contains some fairly simple branch offset mutations, at first glance it may be a slight "wtf moment" (at least I hope), but as soon as you figure out how the compa…

  12. lengyue
    UnPackMe · Started by lengyue,

    The Enigma Protector v7.60 (x32 & x64) Example of Shell Addition for Enigma 7.60. This is a different example from the past, interested friends please challenge. Unpack, cracking or Patch HWID. Use your means to make it work correctly. TheEnigma_7.6_x32&x64Example_protected.rar File Information Submitter lengyue Submitted 08/28/2024 Category UnPackMe View File

  13. CodeExplorer
    UnPackMe · Started by CodeExplorer,

    Obsidium v1.6.9 This is just one of my program protected The objective is unpack it. File Information Submitter CodeExplorer Submitted 08/09/2024 Category UnPackMe View File

  14. boot
    CrackMe · Started by boot,

    PatchMe No.1 2024 (x86 32-Bit) PatchMe.exe MD5: DD4E072F8B5CA241927EAA63DED47383 SHA1: 08F4699C3A84F5E40343CE9A9AD05046EE15D6DD CRC32: 9A4C0721 PatchMe No.1 2024 Please check the ReadMe.mp4 in the zip package, you'll understand what I mean... If you have solved this challenge, please make tutorial(s)... I will mark the answers with tutorials as a solution. About This Challenge... - Author: boot - Date: February 10, 2024 - Difficulty: ★★☆☆☆ - Architecture: x86 32-Bit - From: Tuts4you - Platform: >=Win95 File Information Submitter boot Submitted 02/10/2024 …

  15. Sound
    UnPackMe · Started by Sound,

    Unpackme : VMProtect Ultimate v3.0.1.465 Protection option .: Complete Protection Linker : Delphi Download: http://release.crack4r.cc/Exercise/VMProtect_Ultimate_v3.0.1.465.UnpackMe.7z have fun, Best regards, Sound

  16. boot
    UnPackMe · Started by boot,

    ASProtect SKE 2.56 SDK Sample (x32) Coded by boot / Tuts4you, ASProtect SKE 2.56 | UnPackMe x86 32-bit Medium Protections + SDK September 16, 2024 If you unpack it write a tutorial... ------------------------ HWID: FBFFC7AD-5EF5 USER: boot SN: YHRQ6C-WVDZ3-4X673-R6QSB-S7PBF-C52DP-WYDXK-RWJAB-2ZXJR-B4MY9-G5VUQ File Information Submitter boot Submitted 09/16/2024 Category UnPackMe View File

  17. Mouradpr
    KeygenMe · Started by Mouradpr,

    hi friends and welcome . today we r going to see a classic KeyGenMe, it's a little bit meduim to hard. Required : - Serial for Lite Verion [newbies] - Serial for Standard Version [Meduim] - Serial for Professional Version or KeyGen [Meduim + 1] cya! ================ please redownload the challenge.. there was a bug.. i fixed it BrainKiller KeyGenMe Fixed.rar

  18. boot

    The Enigma Protector x64 v7.40 (Demo Version | All Protection Options) Unpackme x64 - Enigma Protector 7.40 (Demo Version | All Protection Options) Enigma x64 + SDK +HWID Lock + etc... https://forum.tuts4you.com/ If you unpack it, please make tutorial(s)... 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 2023.08.21 File Information Submitter boot Submitted 08/21/2023 Category UnPackMe View File

  19. BunnyLab
    KeygenMe · Started by BunnyLab,

    Easy CrackMe #1 Only simple algorithms - for one name one key. Provide a valid pair of name and serial, or write a keygen. Good luck. File Information Submitter BunnyLab Submitted 12/08/2020 Category KeygenMe View File

  20. Fatmike
    UnPackMe · Started by Fatmike,

    Fatmike's Crackme #5 ..::[FaTmiKE 2o24]::.. Welcome to my 5th crackme! It took a long time implementing this, i hope it is hard to solve! Sorry for the long load time of the crackme Here are the goals: 1. The main goal is to unpack and uncrypt this crackme. 2. Find a valid serial or write a keygen. If you only succeed in 1. or 2. it's fine, i am happy to read every solution. (e.g. if you can find a valid serial without unpacking, please write a tutorial how you did it!) The crackme was tested on windows 10. Have fun! PS: 1.) Windows Defender returns a false positive due to my custom protection. If you do not trus…

  21. Mohd
    UnPackMe (.NET) · Started by Mohd,

    DNGuard HVM v3.953 Try to unpack or alternatively provide the secret key, URL, Name and Address Protections used: DNGuard Enterprice HVM 3.953 Good luck. File Information Submitter Mohd Submitted 09/08/2020 Category UnPackMe (.NET) View File

  22. Sound
    UnPackMe · Started by Sound,

    Unpackme : WinLicense_2.3.8.0 Linker : Delphi Hardware ID: 1057-C911-F86F-03EB-CB96-290C-7855-2BAE Download: http://release.crack4r.cc/Exercise/WinLicense_2.3.8.0.UnpackMe.7z Have fun ! Best regards, Sound

  23. mm10121991
    UnPackMe · Started by mm10121991,

    hello this is a new winlicense 2.1.3 unpackme with HWID lock but not like other because of ring 0 licensing management good luck on it WLK.rar

  24. whoknows
    UnPackMe (.NET) · Started by whoknows,

    VMProtect Lite v3.8.7.2001 This methods protected with Ultra setting (mutation+virtualization) and complexity none ( for example if complexity setted 22% the output goes 1mb ). Either unpack it, either provide a valid license file. File Information Submitter whoknows Submitted 08/27/2024 Category UnPackMe (.NET) View File

  25. VB56390
    UnPackMe (.NET) · Started by VB56390,

    dotNet Protector v6.0.7180 Assemblies are obfuscated, then method bodies are replaced by corrupted code; de-compilation and disassembly tools like ILDASM can no more unassemble methods. Components Protection, this feature enables not only exe protection, but dll as well. ASP.Net is supported by dotNet Protector. Added anti-JIT. File Information Submitter VB56390 Submitted 08/24/2024 Category UnPackMe (.NET) View File

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