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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. MindSystem
    UnPackMe (.NET) · Started by MindSystem,

    Hello, here's a challenge for you You have to unpack the file who is obfuscated with ben mhenni protector Virus scan : https://www.virustotal.com/fr/file/5270166dc926b1f484f82ffdec895f1822fbf552044c6f9e36fe6b1ad85db1a8/analysis/1425211389/ Good Luck ! File is attached to the topic CrackMe.rar

      • Like
    • 11 replies
    • 13.3k views
  2. MindSystem
    UnPackMe (.NET) · Started by MindSystem,

    Hello, here's a small challenge for you The file is obfuscated with .net reactor 4.9 with all option if you unpack it, please write a tutorial http://www18.zippyshare.com/v/17695329/file.html

      • Like
    • 8 replies
    • 11.9k views
  3. Xons5454
    CrackMe · Started by Xons5454,

    It has a modded confuser + de lastest version of crypto i've tried a lot and i cannot. I'll see if you can Download link: https://mega.co.nz/#!OQYiFYZZ!JZxpNos9lskhW8--n_Up4ZAwcmcaTPOko1ffpQJBXYo Virusscan: https://www.virustotal.com/es/file/f22a4f0cc00fa4625deb00164be9a86d092ed6933b86d05e9ddf08d3d2e074c5/analysis/1401740447/

      • Like
    • 3 replies
    • 6.6k views
  4. v0k3

    Hello reversers, my name is V0K3 and I'm new in this wonderful community! Today I will post a project done by Lollo90 (and me) for the new entries of the .NET reversing. This is a pack (probably later there will be more than one) of 10 NET fixmes, the only things you have to do is fixing their MetaData and then change the text of the textbox with both Reflector and SimpleAssemblyExplorer. Is preferred to do it manually so you can write a little tutorial / document on how to fix that specific MetaData. I know that this won't be hard for you, anyway it can be interesting for the new (.NET) crackers that doesn't know how to deal with MetaData errors. …

      • Like
    • 19 replies
    • 13.1k views
  5. zelda
    UnPackMe · Started by zelda,

    Hello unpackme: Safe engine Shielden v2.3.0.0 full protection activated packed notepad.exe windows7 32/64bit good luck notepad_se.rar

    • 3 replies
    • 13.5k views
  6. CodeEnding
    UnPackMe (.NET) · Started by CodeEnding,

    Good luck %&$&#%@#.rar

    • 1 reply
    • 11.7k views
  7. 0xFFFF
    UnPackMe (.NET) · Started by 0xFFFF,

    Good luck! Find out correct combination of Username/Pass/Serial CrackMe_Latest.zip

    • 1 reply
    • 11.6k views
  8. sa38154
    CrackMe · Started by sa38154,

    Hello, Please Testing, Simple exe and Program protected now.. and CrackMe this Good luck __CrackMe__.rar

      • Like
    • 15 replies
    • 10.2k views
  9. NightBaron
    CrackMe · Started by NightBaron,

    Good Luck Virus Total https://www.virustotal.com/th/file/825763b7d96f64b384a226fc8f5a8b20b099322cdd5f9996f6eb189a2aba9d2b/analysis/1423996040/ and thanks if you tutorial how to unpack CrackMe.rar

    • 3 replies
    • 7.2k views
  10. patchaya

    CrackMe+UnpackMe UPCRKMEProtected.rar

    • 5 replies
    • 7.5k views
  11. patchaya
    UnPackMe (.NET) · Started by patchaya,

    I would like to know about how to unpack ? thank you very much UnpackMe_DotNetPatcher.rar

      • Like
    • 3 replies
    • 8.7k views
  12. xSRTsect
    KeygenMe · Started by xSRTsect,

    A very basic crackme I coded a few days ago, the purpose is to get yourself acquainted with the x64 intrinsics. Rules are basic too just fully reverse the damn thing and the first 2 people will get the crackmes source code. Happy Reversing EDIT: The second attachment contains the crackme with the MSVC libraries linked statically. Available Sources For GiveAway: 1 Exodia and Kao solved this little toy AMD_64_1.rar AMD_64.zip

      • Like
    • 3 replies
    • 6.5k views
  13. 0xFFFF
    CrackMe · Started by 0xFFFF,

    Hello, this is my first CrackMe, but I think is very hard because I haven't seen this method yet. Sorry for 2mb file, but linking is very much size. There is a function which returns true/false for Login, patch it to true and you did it. Might be super easy or super hard, idk! Good luck CrackMe.zip

      • Like
    • 4 replies
    • 5.8k views
  14. NightBaron
    CrackMe · Started by NightBaron,

    Protection : ConfuserEx + Mpress + Hex Editor ** program can't start ** ** you must edit hex for make program can running ** Good Luck i don't know why virustotal show has trojan , it not has trojan ** Sorry , i'm not good English Language ** Virus Total :: https://www.virustotal.com/en/file/8b8062899560e7a81c64d74030096b01d039b40efa258fcd8b5270ee9d0b7ede/analysis/1422087515/ Protection.rar

      • Like
    • 6 replies
    • 9.8k views
  15. Office Jesus
    KeygenMe · Started by Office Jesus,

    Hello, everyone!I want to present the next entry in my "Fun" series. This time it's a bit of crypto!Features of this keygenme: Coded (poorly) in MASM Not packed Not for beginners? Difficulty: 2-3/10 I hope you guys solve this and post tutorials (text, flash, anything) in this thread! As always, I fully expect ChOoKi to solve this within five minutes of downloading. I also expect him to half-ass his way through a tutorial and then not post it. Good luck, everyone! I look forward to your solutions! If you find any bugs, please report them so I can fix them.Cheers, Office Jesus fkgm2.zip Solutions Ragdog DimitarSerg ChOoKi

      • Like
    • 19 replies
    • 9.1k views
  16. DragonX
    UnPackMe (.NET) · Started by DragonX,

    [unPackMe] Dotwall Obfuscator obufuscated file Protected with Dotwall Obfuscator 17.0.0 demo version If you can unpack it please write a tutorial! Thank you~~~ DotWallCrackMe.rar

      • Like
    • 8 replies
    • 9.1k views
  17. estelle
    UnPackMe · Started by estelle,

    FB8E-8ADA-5D2A-AC99 dvXCUjbJ5xgJbD+tjBctev6OANL/pp9j3mmg7Vjc E/PuQa5do6Lmf8dYnU5bN0M/Bj0rrBuQ1NsBIqi9 PWPRz3BeRVmWTjgncHB+JZcAEV8sxMil sex.zp.rar

  18. Arting
    UnPackMe · Started by Arting,

    This target is protected with Themida 2.3.1.0 x64 Virtualize Protection Core With: TIGER64 (Black) Good luck! UnpackMe Themida 2.3.1.0 x64.rar

      • Like
    • 1 reply
    • 8.7k views
  19. SHADOW_UA
    KeygenMe · Started by SHADOW_UA,

    Simple .NET KeygenMe. No obfuscator used, but classes and methods are renamed. KeyGenME.zip

      • Like
    • 1 reply
    • 5.9k views
  20. Aguila
    UnPackMe · Started by Aguila,

    Are you tough enough to break this? WinLicense with lowest possible protection options. Standard Virtual Machine: TIGER64 (Red) UnpackmeWLx64.rar

      • Thanks
      • Like
    • 13 replies
    • 14.9k views
  21. simple
    CrackMe · Started by simple,

    Ladies and gentleman - live from the CrackMe's Arena of tuts4you.com - welcome to the main event of the evening.In the blue corner, we have Rumble.rar wieghing in at 86.5 kb, consisting of a C kernel binary and a C++ user binary, unpacked, fighting out of the Windows XP/7/8 x86 OS.*crowd gos wild yeeeeaahhh wooo!!!!!*In the red corner, we have the contender, the master reversing underdog, with a history of infinite knockouts, fighting out of tuts4you.com - putting their flawless record on the line!*crowd boos boooooooooo* (jk )Alright, I want a clean fight, anything goes, first fighter to submit the other or make the program accept the correct serial wins the title/public…

      • Like
    • 12 replies
    • 6.2k views
  22. X-88
    KeygenMe · Started by X-88,

    I hope you try this, and post the results in the form Keygen / Serial Not Patch. Hi To: All Member Forum tuts4you.com X-88 Crack Me #7.zip

    • 5 replies
    • 11.4k views
  23. XorRanger
    KeygenMe · Started by XorRanger,

    Here is a KeygenME i put together today when i had some free time. I know some set of people will solve this under 5 minutes. RulesNo rules.Solutions A working keygen : Gold A Working Serial : SilverPatching : Bronze A Tutorial would be appreciated.Please Do Solve. ** Sorry about the Size. Edit : just Fixed the bug reported by xSRTsect, sorry about that and thanks xSRTsect for reporting. Edit2 : Fixed Another Bug (Hopefully the Last ) that made it impossible to get a valid key even through bruteforce). XorRanger's KeygenME #7 Fixed Final.zip Valid Solutions so Far Office Jesus xSRTsect

      • Like
    • 17 replies
    • 7.8k views
  24. despy
    CrackMe · Started by despy,

    exe no packed,dll is protected with vmp. press the crackMe button,it will show a Message. if the Msg show the same info every time,then game over. enjoy yourself! [update] it seems very hard to crack.now i have remove some codes. try again,have a good time! crackMe2.zip app.zip

      • Like
    • 4 replies
    • 6.4k views
  25. mudlord
    UnPackMe · Started by mudlord,

    for the newbs.... unpackme.rar

      • Like
    • 7 replies
    • 7.7k views

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