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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. CodeNatif
    CrackMe · Started by CodeNatif,

    To meet this challenge you must upload the file deobfuscated and cracked. CrackMe - Good Level.rar

      • Like
    • 5 replies
    • 6.6k views
  2. XorRanger
    KeygenMe · Started by XorRanger,

    Here is a KeygenMe written by a friend, He requested i should upload this as a challenge here. Here is it KEYGENME.rar

      • Like
    • 2 replies
    • 10.8k views
  3. li0nsar3c00l
    UnPackMe (.NET) · Started by li0nsar3c00l,

    hey guys, as some of you may already know, I've been working on an obfuscator for quite a long time. https://www.disguiser.net/ There is still a lot of stuff to improve, but I' like to know, how long it takes an experienced reverser to code a Keygen for this. All features are present in normal mode, so I still have something harder in case this is too easy for you guys I'd rate it 6/10, let me know what you think PS. it might not be the best nor innovative, but its mine! if you find my hidden messages, you will get something from me (yeah, plural! and PM me for your small gift, once you found them) greetz li0nsar3c00l [RTN] Keygen…

      • Like
    • 9 replies
    • 10.5k views
  4. NightBaron
    UnPackMe (.NET) · Started by NightBaron,

    Good Luck Virus Total : https://www.virustotal.com/th/file/e6dcf5004d43919b632ca5817fea7235a491fc82c2e76cc5a1d523a706dfbea0/analysis/1434856735/ *if password correct msgbox "เก่งจ้า : D" UnpackMe.rar

      • Like
    • 2 replies
    • 11.8k views
  5. CodeNatif

    To meet this challenge you should unpack fully this file. CrackMe_Packed.rar

      • Like
    • 4 replies
    • 9.3k views
  6. sondeay
    CrackMe · Started by sondeay,

    UPX VM Note: Access Successfully. a good CrackMe KeygenMe.rar

    • 1 reply
    • 6.2k views
  7. Guest RiiX
    UnPackMe (.NET) · Started by Guest RiiX,

    Hii, I test a protection for research, try to unpack ^^ Good luck ^^ UnpackMe.rar

      • Like
    • 8 replies
    • 12.9k views
  8. Xer0x
    UnPackMe (.NET) · Started by Xer0x,

    Protect : DotNetPatcher + .... - Post Unpacked File Here - If Possible , Can you give me tutorial please Good Luck UnpackMe.rar

    • 5 replies
    • 10.8k views
  9. XenocodeRCE
    UnPackMe (.NET) · Started by XenocodeRCE,

    Very simple modded version, nothing special. CrackTest_.rar

      • Like
    • 3 replies
    • 9.8k views
  10. Kido
    UnPackMe · Started by Kido,

    This is a simple UnpackMe using VMProtect Ultimate v2.13.5. I also used vmp's licensing system in this UnackMe, and locked one function with key. I have provided 3 different keys for this bin. A blocked key ,a valid key locked with a hwid(which i suppose no one has th same hwid) and an expire key. I also added 2 anti-debug thread to this file. Using VMProtectIsDebuggerPresent(if you have sod, i guess you can bypass this one pretty easy) and VMProtectIsValidImageCRC(crc). Didn't use VMProtectDecryptString feature. Several things I expect from this UM: Simply unpack it. Bypass the blacklist key. Bypass the expired situation. Patch hwid. Better create a …

      • Like
    • 16 replies
    • 23.2k views
  11. Lion-_17
    CrackMe · Started by Lion-_17,

    CrakMe-Lion-_17.rar

      • Like
    • 8 replies
    • 8k views
    Teddy Rogers
    Teddy Rogers
  12. Lion-_17
    CrackMe · Started by Lion-_17,

    This is my first CrakMe CrakMe Lion-_17.rar

      • Like
    • 7 replies
    • 7.5k views
    Teddy Rogers
    Teddy Rogers
  13. CodeNatif
    UnPackMe (.NET) · Started by CodeNatif,

    The aim is deob and crack this file. (Medium) CrackMe - ConfuserEX 0.5.0.rar

      • Like
    • 2 replies
    • 10.5k views
  14. CodeNatif
    UnPackMe (.NET) · Started by CodeNatif,

    The aim is deob and crack this file. Simple CrackMe - ConfuserEX 0.5.0.rar

      • Like
    • 2 replies
    • 10.1k views
  15. CodeEnding
    UnPackMe (.NET) · Started by CodeEnding,

    -I use function encrypt string only Good luck UnpackMe.rar

    • 6 replies
    • 10.5k views
  16. simple
    CrackMe · Started by simple,

    Had this sitting around and thought I'd see what happens w/it here! Goal is to remove the kernel based protection, from inside the kernel (driver must be loaded). Or make any of the functions in the picture work.Any solution w/driver loaded is valid - patching, custom driver to unload protection, etc. X86.sys or X64.sys must be loaded.REQUIREMENTS:- Vista x86/x64 & newer (no xp) - Admin Privs - Test Mode Enabled INSTRUCTIONS: This requires driver test mode enabled. Before running, from an admin cmd prompt type the following, then restart -bcdedit /set TESTSIGNING on bcdedit /set loadoptions INTEGRITY_CHECKS_DISABLEDGood luck! MY_NAME_IS_LOADER.rar

    • 4 replies
    • 6.9k views
  17. NCK

    hi all. this is my new UnpackMe .. have a try . I dont think you can unpack it... good luck .. UnpackMe_hardhard.rar

    • 7 replies
    • 7.9k views
  18. HellSpider
    UnPackMe · Started by HellSpider,

    Hi. Attached an unpackme protected by Enigma Protector 3.100 - Build 20121010 . The unpackme is coded in MASM. unpackme_enigma_3.100.rar

      • Like
    • 13 replies
    • 10.7k views
  19. hakouabs
    UnPackMe (.NET) · Started by hakouabs,

    Hello members of Tuts4You UnPackMe _AppFuscator .. and tuto....Plz WindowsFormsApplication1.rar

      • Like
    • 27 replies
    • 17.9k views
    CodeExplorer
    CodeExplorer
  20. NCK

    hello all friends .. this application just protected with DNGuard v3.7 Trial +Themida v2.3.3.0 ! have a try. if you win , please write your steps ! good luck ... UnpackMe_Themida.rar

      • Like
    • 3 replies
    • 11k views
  21. X-88
    KeygenMe · Started by X-88,

    Try it, very basic mathematic. Level : beginer. X-88 - KeyGen Me #8.zip

    • 4 replies
    • 6.6k views
  22. Undebel
    UnPackMe (.NET) · Started by Undebel,

    Good luck UnpackMe & CrackMe.rar

      • Like
    • 9 replies
    • 13.9k views
  23. RDGMax
    UnPackMe (.NET) · Started by RDGMax,

    Hello my friends here a new crackme version... again! Crackme Revision 5! The Difficulty increased a bit! Level 5 of 10 +New tricks added Thanks my friends! RDG.Crackme.net.v5.2015.zip.rar

      • Like
    • 8 replies
    • 12.5k views
  24. NCK
    UnPackMe (.NET) · Started by NCK,

    hi all . this application was protected with a protector enterprise edition ! have a try .. good luck . UnapckMe_New.rar

      • Like
    • 5 replies
    • 8.2k views
  25. Unc3nZureD
    UnPackMe · Started by Unc3nZureD,

    Hi guys, here's a quite simple crackme and packed with enigma. Let's see if you can unpack it & crack it The "License scheme" Is very simple and only contains numbers. The goal is not to write the License denied message, but the other one Why is it ++? Because I tried to use Enigma as deep as possible I used markers, vm and some more. There are a few stuff which I couldn't figure out how to use, but I think it should be harder than simply unpacking an enigma. Link to download: http://ge.tt/1nlum7F2/v/0?c Good luck guys. Edit: Added file to the post Modified description a bit EnigmaCrackMe_protected.7z

      • Like
    • 4 replies
    • 9.9k views

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