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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. InsaneFIDO
    KeygenMe · Started by InsaneFIDO,

    This is my first attempt at a KeyGenMe app . I wrote an mp3 player app. purely for programming practice so do not expect state of the art graphics or playback. The app as presented is an 'unregistered' version which a correct serial will convert to the 'registered' state. Please note that the app. will not run directly but must be executed via a shortcut. When you solve it please write a tutorial as some parts of the solution may answer at least one question I have seen posted on the forum. I wrote the whole thing in assembly language in Windows XP SP2, and it will not work on non NT based systems. Happy reversing in whatever you are working on Cheers InsaneFIDO FID…

    • 2 replies
    • 4.1k views
  2. TGunner54
    KeygenMe · Started by TGunner54,

    Well, i decided to make this after being board... Points - Fished Key = 0 - Self-KeyGen = 0 - KeyGen = 1000 CrackMe v3.0 - Simple Key Generation - Simple Anti-Breakpoint (On One Function) Im looking for a KeyGen, I will just ignore Patches and Fished Keys... CrackMeV3.zip

    • 6 replies
    • 4.4k views
  3. TGunner54
    KeygenMe · Started by TGunner54,

    This is a difficult crackme. Yeh... you can patch it but thats not what i want. I want the Key! CrackMe v2.0 - MD5 Encryption MD5 Key Information Key Length : 16 Key Characters : Numbers MD5 Encryption Module : MD5(MD5(Key).Salt) I will be suprised when you find the key, thats if you do... Good Luck! CrackMeV2.zip

    • 2 replies
    • 7.5k views
  4. Teddy Rogers
    UnPackMe · Started by Teddy Rogers,

    eXPressor 1.6.0.1 I haven't patched the silly nag - if it pops up on you - but you get the idea... http://www.tuts4you.com/download.php?view.2179 Ted.

    • 5 replies
    • 8.7k views
  5. Kurapica
    KeygenMe · Started by Kurapica,

    Hi everyone It's been a while since we wrote a .NET crackme so this is a nice one to refresh your minds It's not very hard but needs a little brain, Of course you can do it in one patch but It's not allowed so you must write a valid keygen and a tutor for the rest of us to show us how you solved it. Enjoy... K_CrackME_15.rar

    • 2 replies
    • 4.5k views
  6. rendari
    UnPackMe (.NET) · Started by rendari,

    Anything goes. Read the readme and good luck. IMO much harder than the last ver bleh Compatibility issues fixed. Download new ver here: http://www.filesend.net/download.php?f=b2d...238f8690e0d8619 Sorry for any problems.

    • 17 replies
    • 8.7k views
  7. Teddy Rogers
    UnPackMe · Started by Teddy Rogers,

    ANDpakk2 0.18 http://tuts4you.com/download.php?view.1878 Ted.

    • 6 replies
    • 5.8k views
  8. Pimp.exe
    KeygenMe · Started by Pimp.exe,

    Simple keygen mes 1 & 2 I wrote recently. They are written in VB 6.0. Write me a tut and make me a keygen NOTE: I said it was EASY so if you are looking for a hard challenge, dont bother downloading. Key4LilBro__1.zip Key4lilbro__2.zip

    • 9 replies
    • 5.2k views
  9. qwertydid
    KeygenMe · Started by qwertydid,

    This is a simple KeygenMe that I put together in ASM. It should'nt be too hard. It says that you should solutions upload to crackmes.de, because I created it for that site in the first place, but you can just upload your solutions here. Good KGM1_qwertydid.zip

    • 12 replies
    • 8.6k views
  10. G0nD4l0F
    CrackMe · Started by G0nD4l0F,

    Hi Every Body This Is Persian Lock Which Write in VB Test IT For Any Method Of Cracking & Make Tutorial Very Easy To try Thanks To all For Taking Time To Look At This Crack me PersianLock.rar

    • 17 replies
    • 7.9k views
  11. DrPepUr
    KeygenMe · Started by DrPepUr,

    In what little time I have been messing around in RCE I have never came across a Vb target in P-Code. I never gave P-code much thought until on PSC I seen somebody had posted their code and labeled it "Uncrackable". So... I had to give it a try, I downloaded it and went to work but everything I had learned seemed not to apply. It didn't take long to see it was P-Code and for about 2 seconds I almost gave up. After an hour or so I thought I could write a little reg-routine and compile it in p-code so when I had it loaded in Olly and Vb-Decomp I would know what I was looking for. My effort was rewarded I learned enough to tear the "Uncrackable" a new one. So if you have nev…

    • 8 replies
    • 6.4k views
  12. DrPepUr
    KeygenMe · Started by DrPepUr,

    I wrote this just trying to learn a little about ASM so if my code is sloppy keep in mind I have been programming in ASM a total of a couple weeks at most.. So it shouldn't be too hard. Happy Cracking.... Dustyh1981 DrPepUr__2.rar

    • 8 replies
    • 5.2k views
  13. GamingMasteR
    KeygenMe · Started by GamingMasteR,

    Hello guys , I made this KeygenMe about 3 months ago in AT4RE ... and i would like to share it here just for fun :happy: . ------------------- The KeygenMe is not Packed/Encrypted . The Algorithm is really for kids , but beware of tricks . I need a working Keygen NOT a serial for ur name . Good luck, GM Sadistic_X__2.rar

    • 35 replies
    • 13k views
  14. Mouradpr
    KeygenMe · Started by Mouradpr,

    hi all this challenge for newbie's KeyFileME_3.rar

    • 3 replies
    • 5k views
  15. adam
    CrackMe · Started by adam,

    Just wanting to test out this auth system before we implement it. http://rapidshare.de/files/38212602/crackme.rar.html By cracking it, I'm referring to the trial portion, not the "congratz" message, but you can do that too if you want to feel special.

    • 4 replies
    • 7k views
  16. Encrypto
    KeygenMe · Started by Encrypto,

    hello all nice to see you again this time instead of modifying a pre-existing crypto i decided to make my own i know its not the best but it was a first attempt i hope you like this one : http://www.mediafire.com/?dw1mww0ef3a please can you rate it and give feedback ? thanks very much for trying this and i hope you enjoy it :cool: Keygenme.v.8.FOFF.by.Encrypto.zip

    • 4 replies
    • 4.6k views
  17. GioTiN
    KeygenMe · Started by GioTiN,

    easy Keygen Me 1 Easy_Keygen_Me_1.zip Size : 157 kb you not allow patch it , plz written a keygen for this and so written tutorial for a way in this thanks - GioTiN

    • 12 replies
    • 7.4k views
  18. Teddy Rogers
    UnPackMe · Started by Teddy Rogers,

    Thinstall 2.736 http://tuts4you.com/download.php?view.1679 Ted.

    • 5 replies
    • 7.4k views
  19. pavka
    UnPackMe · Started by pavka,

    Protected Private exe Protector 2.40 All protections enabled Unpacme_Private_exe_Protector_2.40.rar

    • 14 replies
    • 6.5k views
  20. Encrypto
    KeygenMe · Started by Encrypto,

    hello again Here is my new KeyGenme.7.0 Hope you like this. people who think this is easy ... stay away .. id love to get feedback .. incidentally 7 is my lucky number http://www.mediafire.com/?8mnbb0d0uzs ECrypt7.2008._FOFF.zip

    • 25 replies
    • 13.8k views
  21. Teddy Rogers
    UnPackMe · Started by Teddy Rogers,

    ASProtect SKE 2.4 (Build 09.11) http://tuts4you.com/download.php?view.1990 Ted.

    • 20 replies
    • 12.9k views
  22. Kurapica
    UnPackMe (.NET) · Started by Kurapica,

    This is a challenge for those who like unpacking .NET and It's protected with the latest version of Reactor Enjoy it but remember that a tutor is required in case you manage to unpack it. UnpackMe.rar

    • 9 replies
    • 10k views
  23. lena151
    UnPackMe · Started by lena151,

    After lARP v2.0 lite which was step-in level, here is an unpackme protected by lARP v2.0 Standard Ed. Dump and remove stub section. It would be great if you shared your remarks and the way how you did it by pm please. Don't hesitate to pm me for this one O, and the original unpackme doesn't run on win9x, hence the lARPed file doesn't either lena151. lARP_v2.0_Standard_Ed._UnpackMe.rar

    • 7 replies
    • 6.2k views
  24. Nevyn
    CrackMe · Started by Nevyn,

    Unpacked, but still not cracked The file has been succesfully unpacked by sdy100 Check his unpacked attachment abit further down. Waiting for a full explanation. Did you run into any problems? Correct Key solved by Till.ch Correct key is: correctkeyisthishao Information I just recently found my passion for protection coding along with trying to break it. I've used a opensource packer and made some heavy modifications to it, also added loads of anti-codes. I've had no success in getting out the correct key which you are supposed to type in, neither been able to unpack it. Allthough, i am a terrible reverser, i would like to get a 2nd opinion about this protectio…

    • 24 replies
    • 8.8k views
  25. TiGa
    CrackMe · Started by TiGa,

    This is a crackme I made 4 months ago and it has not been solved yet. Target: VistaSidebarGadgetCrackme by TiGa on www.crackmes.de Format: Windows Vista Sidebar Gadget (.gadget) Work to do: Find out what is a .gadget Remove the nags Activate the backdoor Turn the crackme into a keygen in .gadget format Write a solution Optional Work to do: Write a keygen in a "traditional" programming language (.exe) It doesn't absolutely require Vista to solve it but it helps a lot. Prepare yourself to be amazed by M$'s new "proprietary" file format. TiGa VistaSidebarGadgetCrackme.by.TiGa.zip

    • 2 replies
    • 4.2k views

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