The Game Boy uses a 8-bit computer chip similar to an Intel 8080. As it has only 256 instructions it’s an interesting candidate for experiments such as writing an assembler from scratch — and that’s what this article is about. Here I’ll describe the process I went through when I…

Today we are going to generate a simple keygen to crack this beautiful crackme named “Get The Password”. Here’s the beast:

Today we are dealing with yet another .net crackme. Let’s see how it goes… The crackme is a sort of X-times usage trial. After we’ve opened the executable 10 times we have the opportunity to test if we cracked the trial or not. Using dotPeek we can decompile the binary…

Learning how to crack a .net binary — Let’s see how to solve this .net crackme. Let’s try the crackme with some random credentials to see how it goes.

This time we are tackling this .net crackme. Let’s try it out first. It’s a simple form requesting a username and a serial key. On the main form code, we can see the validation method being called inside the confirmation button click method.

This time I’m tackling this crackme called Mexican. In order to solve this, we will use radare2’s to analyze the binary and find the flag. Then we’ll have to patch the binary in order for it to output the flag. Let’s jump right in! If we open the binary using…

We’ll be facing an alien binary this time. Level 2 alien technology, to be precise. Found on ruins of an ancient alien civilization. You can download the binary using this link and follow along: Alien Binary In the ruins of an ancient alien civilization, a micro sd card was found with this binary inside. It's asking us to feed…crackmes.one Let’s jump right into it! Taking a quick look at the code-flow in the main function…

This time I’m tackling this beautiful crackme, the third of the series. To solve this we will use radare2’s macros and unicorn emulation. Let’s jump right in! Some Introductory Analysis The crackme asks for a 4 digit password that the user needs to input one digit at the time. Similar to a PIN. …

This is a walkthrough for the second crackme of this series. Here’s the main function. Here we can see there’s a function call to the “xxx” function right after the input is received. Here’s the meat of the crackme. Inside the “xxx” function the password is generated: