Keygenning

This KeygenMe is coded in Microsoft VC++ 6.0 (you can check with PeiD ) and not use of Hash Crypto's (you can check via KANAL Plugin in PeiD). In this KeygenMe we need to solve 2 algorithms so I have decided to explain all the steps to you.

A video tutorial on keygenning CloneTrone KeygenMe #1.

A video tutorial on keygenning BadSector CrackMe #1.

This tutorial shows how to keygen Jopas KeygenMe3. Protection includes: elgamal-256 bit, rsa-256 bit, sha-256

I made a video presenting an interesting keygenme. In this video you can see what is done and how is done to reverse a keygenme. If is too fast please press pause.

Steps:

1. Running for the first time the keygenme
2. Detecting protection
3. Unprotecting
4. Analyse of the algo
5. Creating the keygen in VB. NET Express 2010
6. Bug testing
7. Finalising keygen
8. Testing keygen

Hope someone will find this useful.

An explanation of the solution to TDC KeygenMe #8.

Hello and welcome to another Office Jesus tutorial paper. Today, we are going back in time to 1999 for a blast from the past. In the year 1999, tHE EGOiSTE! (tE!) developed and released an official "Joining Contest" in the form of a crackme/keygenme for the group DAMN. The group itself was fairly popular with notable members, including Ivanopulo. While the group died many years ago, their legacy lives on. In our case, we are going to solve one of the group's admittedly easier public challenges. Although this challenge is now 15 years old, there is still much that young reversers can learn from it. For this challenge, we will be unpacking, serial fishing, patching, and keygenning. So, get your OllyDBG ready, and let's begin!

RSA Tutorial 01 - Keygenning RSA
Quote Movie tutorial showing a method of keygenning RSA using RSA Tool 2.
RSA Tutorial 02 - Serial Fishing RSA
Quote A second movie tutorial from STyX, this time showing how to serial fish a basic RSA routine.
RSA Tutorial 03 - How to Find RSA Primes
Quote Another Shockwave Flash tutorial from STyX this time explaining how to find and sort the RSA Prime numbers out.
 

Decided to get back into reversing after a very long hiatus, in which now I must revise my skills to get back in top form. Figured this was also a good time to write a tutorial in cryptographic keygenning for beginners. This tutorial assumes you have some basic reversing knowledge, as well as familiarity with unpacking basic packers with the ESP trick.

A Shockwave Flash movie tutorial showing a method of keygenning a simple KeygenMe.

Example code is in Delphi.

I know this was presented before somewhere around here but it want to show a more exhaustive solution for learners to see. Hope it will be useful to someone.

Quoting Wikipedia, In computer science and mathematical logic, the satisfiability modulo theories (SMT) problem is a decision problem for logical formulas with respect to combinations of background theories expressed in classical first order logic with equality. Formally speaking, an SMT instance is a formula in first order logic, where some function and predicate symbols have additional interpretations, and SMT is the problem of determining whether such a formula is satisfiable.

This article shows how we can use an SMT solver in developing a key generator. We need to find valid keys while also satisfying certain constraints. We will use the Z3 SMT Solver, as it is quite easy to use and also has a nice python API to code against.

Welcome to another of my tutorials. Today we will be working on KeyLilBro1 a VB6 keygenme. No P-Code this time so we are going to have to do a little more thinking.

MD5 Keygenning (Part 1)
Quote Welcome to a tutorial for MD5.

I would like to thank SerialKiller for showing me how to find the Magic Bytes and how to keygen it.
MD5 Keygenning (Part 2)
Quote Welcome to a tutorial on keygenning modified MD5 and how to find its Magic Bytes.

I would like to say thanks to SerialKiller for teaching me how to find the Magic Bytes.

I am assuming that you have seen my previous tutorial in part 1.
 

Hello everyone. Long time I didn't write any tutorials. Thats because lot of things. Anyway here I am with my new MD5 related tutorial. It's focused on MD5 (and modifyed) encryption scheme. As always I'll try to explain everything so at the end of this tutorial you will be MD5 cracker.

With this tutorial comes one keygenme which I made for you so we can practice on it. I also added some sources for masm32 to help us hash MD5. Its good to know that "MD5" stands to "Message Digest 5".

A solution to Ziggy's KeygenMe #1 by NPL.

The project we are about to explore and keygen is Ziggy's KeygenMe #1. It is old KeygenMe written in 2005.

A nice and detailed tutorial explaning the stages and concept behind keygenning a custom algorithm.

A nice and detailed tutorial explaning the stages and concept behind keygenning a custom algorithm.

VB.NET Keygenning Part 1
Quote  
Here's a simple tut about keygenning a VB.NET target by simple ripping. It might by interesting for keygenning starters (like me) or for ppl unaccustomed to .NET Reflector or MS Visual Studio. Sorry for the lazy commenting, but I'm too busy with other stuff atm. Anyway there wasn't much more too say ^^
https://www.tuts4you.com/forum/index.php?showtopic=12440
 
VB.NET Keygenning Part 2
Quote  
Here's a sequel to my VB.NET-Keygenning tutorial. Today we'll see things like:

- a hardware-dependend serial (and the API to get it)
- the protector
- its encoded names and how to get 'em back.

BTW, this doesn't regard only VB.NET-targets, but also all other .NET languages, supported by .NET-Reflector: IL, C#, Delphi, MC++ and Chrome.
https://www.tuts4you.com/forum/index.php?showtopic=12505
 
VB.NET Keygenning Part 3
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Here's another sequel to my .NET cracking tutorials. This time it comes in two different parts:

Target: CrackMe #10 by tKC

Tools: Reflector, M$ VS 2005, {smartkill}, Reflexil

Part 3a:
-keygenning
(I won't show the way to go with M$ VS like in the 1st two tutorials, but I've included a solution source in C# instead of it)

Part 3b:
-Advanced Patching with Reflexil
It's about seeing the new & excellent Add-In for Reflector! I'll show u, how to easily turn this CrackMe into two versions of SelfKeygens.

I only started to realize the power/possibilities of Reflexil and it might be a bit confusing to follow, because of no deep explanations about IL instructions... hence, see for yourself...

Have phun watching it & comments are welcome.
https://www.tuts4you.com/forum/index.php?showtopic=13592
 
 

KeygenMe solution Mr. eXoDia's KeygenMe #2.

A collection of solved keygenme's by dihux.