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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. x0rz
    CrackMe · Started by x0rz,

    Difficulty : 7/10 Language : C# Platform : Windows Packer / Protector : ConfuserEx mod + Extra antidebug and antiattach protection NetCrackMe.rar

      • Like
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    • 4 replies
    • 8.4k views
  2. banme
    CrackMe · Started by banme,

    Difficulty : 3 Language : C# (.NET) Platform : Windows x32/x64 OS Version : Windows 7/8/10 Packer / Protector : AntiSkid (own) Description : get the password. Screenshot : CrackMe-antiskid.exe

      • Like
    • 6 replies
    • 7k views
    Security_ Egypt
    Security_ Egypt
  3. wabafit
    CrackMe · Started by wabafit,

    Language : .NET Platform : Windows x64 OS Version : All Packer / Protector : Modified ConfuserEx Description : This is a heavily modified version of ConfuserEx, mostly custom, some copied from other obfuscators seen in the wild. I believe this to be difficult to reverse to some extent, but definitely not even close to impossible. (Also ignore old Discord ID added I changed accounts a while ago.) Also, please document how you were able to reverse it, and post the serial key. Thank you! Screenshot : Download: CrackMeO.exe

      • Like
    • 8 replies
    • 10.4k views
  4. senzuuu
    UnPackMe (.NET) · Started by senzuuu,

    Language : . NET Platform : Windows OS Version : Windows 7 Packer / Protector : ArmDot Description : Devirtulize the Armdot virtualized code (I used virtualized option + encrypted strings). Screenshot : UnpackMe.protected.exe

  5. banme
    CrackMe · Started by banme,

    Difficulty : 3 Language : C# (.NET) Platform : Windows x32/x64 OS Version : Windows 7/8/10 Packer / Protector : None [just sum anti-skid stuff] Description : get the password Screenshot : Download: CrackMe.exe

      • Like
      • Thanks
    • 5 replies
    • 5.9k views
    TobitoFatito
    TobitoFatito
  6. pankar
    UnPackMe (.NET) · Started by pankar,

    Language : .NET Platform : Windows x86 OS Version : All Packer / Protector : ConfuserEx Modded Description : Can you see the code? UnPackMe.exe

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      • Thanks
      • Haha
    • 3 replies
    • 7.9k views
  7. NightBullet
    UnPackMe (.NET) · Started by NightBullet,

    Difficulty : IDK Language : C# Platform : Windows OS Version : All Windows Packer / Protector : Night Protector 2.0 (My own protector) Description : Unpack-me and clean the code, and give a Difficulty! Screenshot : Click to download crackme!

      • Like
    • 2 replies
    • 7.4k views
  8. blank
    CrackMe · Started by blank,

    Language: .NET Platform: Windows x32/x64 OS Version: Tested on Windows 10, with .NET 4.6.2 Packer / Protector: WinterStorm 0.1 (Personal Project) Description: Here is a project I've been working on for the last 6 months. It's a follow-up to my previous DynamicMethod attempts. This time I also included some simple JIT hooking. Everything here was written by myself, except a helper class for loading dlls from memory. I hope you'll find it entertaining. I can't wait to hear your thoughts. This is (arguably) the best iteration of the popular game, MineSweeper. Unfortunately, it's a demo, and it only allows for 5 moves. In order to keep playing you have …

      • Like
    • 6 replies
    • 6.6k views
  9. Gladiator
    UnPackMe · Started by Gladiator,

    Language : Delphi XE Platform : Microsoft Windows x32/x64 OS Version : XP/Vista/7/8/8.1/10 Packer / Protector : ArmoredBinary - Modern Binary Obfuscation Tool. Description : Attached file was protected with full version of armoredbinary obfuscator ( with medium protection approach ) , make sure unpacked file will execute successfully in any environment. You will dealing with OEP hiding , Resource Protection , Simple IAT Protection , AntiDump Tricks. Screenshot : Protected file after execution will be similar to Thanks. ArmoredBinary_Official_UnpackMe.rar

    • 1 reply
    • 9.6k views
  10. BillsTheGod
    CrackMe · Started by BillsTheGod,

    Platform: Windows Language: C#/.NET OS Version: Windows 10 (I only tested on it so) Protector: Modded ConfuserEx Objective: Modification to ConfuserEx; constants, math protection, variablesmelter, antide4dot (broked rn), three antidebugs (one inside antitamper), sizeof, antivm, antiemulator, antidnspy, antijustdecompiler, intergritychecking, typescrambler etc Unpack the file and find the password. Document how you deobfuscated it. https://www.virustotal.com/#/file/3cd889f4be35cb440f4a4a1c3ececc62a7075ccddeb76553e06ad12e96d94fe4/detection (false positive because of the obfuscation) If there are any errors in this thread or in my english, I a…

    • 2 replies
    • 7.4k views
  11. DrPepUr
    CrackMe · Started by DrPepUr,

    This is more of a confidince builder, so all you pro's dont laugh @ me too much Simple_PatchME.rar

    • 18 replies
    • 12.6k views
  12. Top10
    CrackMe · Started by Top10,

    Difficulty : 1 Language : VB6/C/ASM Platform : Windows x32/x64 OS Version : Windows XP/7/8?/10? Packer / Protector : None Description: Crackme developed with ThunderVB VB6 plugin.Every part of CrackMe is fully handled by its own language,C/ASM part even interact with form elements like Labels and TextBoxs strings to compare with correct ones with almost no help of VB6 code,has no any anti dump-debug,encryption or any other protection,easy Crackme,just like a ThunderVB proof of concept Crackme for fun,if you have any question feel free to ask,enjoy! Screenshot : Crackme.zip

      • Haha
    • 4 replies
    • 6.2k views
  13. DefCon42
    CrackMe · Started by DefCon42,

    Language : .NET Platform : .NET/Mono OS Version : All Packer / Protector : Custom Description : This is something I've stopped working on over the last few months, but if someone's interested in taking up the project with me I'll gladly accept. The original password is hashed to prevent string equality hooking, so the goal here is just to make it respond correctly. Cracking : If you do crack this, please post in the thread (or DM me) about how you did it. It doesn't have to be step-by-step; a simple "after doing X all you need to do is Y" is fine. If you have any suggestions for additional obfuscation, please include those as well.…

      • Thanks
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    • 4 replies
    • 6k views
  14. 0X7C9
    UnPackMe (.NET) · Started by 0X7C9,

    Language : C# Platform : Windows (7,8,10) (x32) OS Version : Windows 7,8,10 (No virtual machine!!!) Packer / Protector : Eddy^Protector 1.0.5 Description : Hello all. I want introduce my hard work. Please try, run and unpack this challenge. Its not confuserEx another mod. Only experienced reverser can unpack this. Sorry if not working for you. For me works, and on many stable OS´s too. And if you have error (0xc00000005) , simply run again it works on next try.. Sorry i have no time to solve that memory leak. Good luck! AV scan: https://www.hybrid-analysis.com/sample/a5f287aeda9145572209fba0738aa6249ab5569f82a705dad73aca5f099f8a5d/5c53553…

      • Thanks
      • Haha
    • 9 replies
    • 10.3k views
  15. phasermoon
    CrackMe · Started by phasermoon,

    Language: C/C++ Platform: Windows x64 OS Version: Windows Packer / Protector: None Description: This is my very first created "CrackMe" and I'd love to get feedback/suggestions on it (especially how I could make it harder without packing/obfuscating/virtualizing the binary)! The challenge is to find the correct password and the correct response. Screenshot: PleaseCrackMe.exe

      • Like
    • 5 replies
    • 6.3k views
  16. HellSpider
    UnPackMe · Started by HellSpider,

    Difficulty : 8 Language : C++ Platform : Windows 32-bit and 64-bit OS Version : All Packer / Protector : VMProtect 3.0.9 Description : The objective is to interpret virtualized functions in the attached binaries. No additional options have been used - no memory protection, no import protection and no compression. The virtualized function(s) will execute when the following key(s) is/are pressed: VMP32 (V1) : P VMP32 (V2) : 1 and 2 VMP64 (V1) : P VMP64 (V2) : 1 and 2 The virtualized functions are not very large. Detailed information of the interpreting procedure/internals or a complete solution paper is pref…

  17. 0X7C9
    KeygenMe · Started by 0X7C9,

    Difficulty : 10 Language : C# .NET 4.0 Platform : Windows x64/x86 OS Version : All Packer / Protector : Eddy^Protector Description : Hello im back. I developping new obfuscator based on ConfuserEx vanilla. But really different and increased protection to 200%. I used some cool algos like: XXTEA, RC6 , RSA. Provide all 200 Key pairs to solve this KeygenMe. Happy decrypting! KeygenMe Eddy^CZ 2019.zip

      • Haha
      • Like
    • 11 replies
    • 10.5k views
  18. detpet
    CrackMe · Started by detpet,

    Difficulty : 3-4? Language : C++, .NET 4 Platform : Windows x64 OS Version : Windows 7+ Packer / Protector : ConfuserEx, Oreans Description : Unpack and provide a quick overview of how you did it and what tools were used CrackMe1.zip Screenshot :

    • 1 reply
    • 5.8k views
  19. Guest
    UnPackMe (.NET) · Started by Guest,

    Difficulty : I don't know, but they say 10 Language : C# Platform : Any Windows OS Version : All Packer / Protector : AssemblyGuard.io Description: You put the key and it will say "That's really correct!" if the key was correct. I'd like someone who unpacked it to tell me how he/she did it 😕 NOTE: I want it to be unpacked, I don't want you to use Process Hacker just to get the key of the Unpackme file. Screenshot: Thanks! UnpackMe.exe

      • Like
      • Haha
    • 4 replies
    • 8.1k views
  20. b1scoito
    UnPackMe (.NET) · Started by b1scoito,

    Difficulty : 7.3 Language : .NET Platform : Windows, x32/x64 OS Version : All Packer / Protector : ConfuserEx Modded Description : ConfuserEx Mod b1scoito Protector Screenshot : unpack.exe

      • Like
      • Sad
    • 3 replies
    • 7.8k views
  21. MatrixReloaded
    CrackMe · Started by MatrixReloaded,

    Difficulty : You Say it :) Language : .NET ( C# ) / C++ Platform : Windows x32 OS Version : Windows 10 , 8 , 7 Packer / Protector : Bulletproof.NET BETA Description : Hey tuts4you Community ! It's a C# Assembly protected by my own protector Bulletproof.NET ... See Missions. Screenshot : *Copyright Materials [ GUI ] : https://www.nuget.org/packages/WPFThemes.DarkBlend/ Missions: + Get the source code of WPF .Net Assembly + AES IV & KEY is in Source , Decrypt two strings in the text box , But it's easy to find with memory dump becuz I didn't use Secure String , Main Mission…

      • Thanks
      • Like
    • 4 replies
    • 5.9k views
  22. MatrixReloaded
    CrackMe · Started by MatrixReloaded,

    Difficulty : 8 Language : .NET / Delphi / C++ Platform : Windows x32/x64 OS Version : Windows 10 , 8 Packer / Protector : SuperMax Engine ™ BETA Description : Hey tuts4you Community ! This is a .net project that I made on my own protector SuperMax protector/packer. The last one cracked , so I upgraded security system to 3.0 version , it's harder to crack. See Missions. Screenshot : *Copyright Materials [ GUI ] : https://www.nuget.org/packages/WPFThemes.DarkBlend/ Rule 01 : Tell us how you cracked it. Missions: 01 > first , earn the Activation Code and write it here ... 02 …

      • Like
      • Haha
    • 17 replies
    • 8k views
  23. whoknows
    CrackMe · Started by whoknows,

    Difficulty : 10 Language : C# Platform : Windows OS Version : Winall Packer / Protector : DNGuard v3.80 - HVM not applied (will expire 26/12) Description : Provide serial or unpack me ggggg.rar

  24. Annie
    CrackMe · Started by Annie,

    Difficulty : 2-4 Language : .NET/C# Platform : Windows OS Version : All Packer / Protector : Custom ConfuserEx Description: Should Be A Very Simple Unpack/Crack Me. Pretty Easy To Remove Anti Tamper. Objective: Unpack And Attach Unobfuscated File And Or Post The Message Box Saying Success! Screenshot(s): Download https://mega.nz/#!wToG3QRD!8XuTTHHbO7zcJiuiBaPxah9kyHIXy4IhIEOCmMM-RvE Virus Total https://www.virustotal.com/#/file/fb2eecda047c4c55d23d598de4b342a48baf4697192fa76c90e1e3c1d50f06c0/detection (False Postives Due To It Being Obfuscated!) Unpack Me - …

      • Thanks
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    • 5 replies
    • 17.1k views
  25. 0X7C9
    CrackMe · Started by 0X7C9,

    Difficulty : 7 Language : C++ (crt support) / C# (:NET 2.0) Platform : Windows 7+ (X86) OS Version : All Widnows Packer / Protector : Rlpack, Upx (custom), ConfuserEx(custom) , Memory protection, Antidebug (ASM) Description : This one is for most experienced reversers. Because computing runtime is spreaded in to the three PE files. Screenshot : CrackMe^ v15___.zip

    • 2 replies
    • 5.4k views

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