Alisson "Infektion" Bezerra

2020

2020 Defenit CTF - Some tasks

Introduction This weekend FireShell wasn’t going to play CTFs, so I decided to look at the Defenit CTF by myself....

Byte Bandits CTF 2020 - Look Beyond

Introduction This weekend, we played Byte Bandits CTF and we finished 9th! It was a really good CTF, the level...

Writing a shellcode for MIPS32

Introduction Writing shellcode is an art, it is something that I really like to do, because it sparks your creativity...

Midnight Sun CTF 2020 Quals - pwn2, pwn3 and pwn5

Introduction This weekend we played the Midnight Sun CTF 2020 Quals. There were a lot of nice challenges and good...

2019

InCTF 2019 - PHP+1, PHP+1.5 and PHP+2.5

Introduction This write-up is about the challenges PHP+1, PHP+1.5 and PHP+2.5, we were able to solve those three challenges with...

Chaos Communication Camp 2019 - CampRE

Description The description of the challenge is clear about what we will have to do: Reverse engineering a .NET Core...

CyBRICS CTF Quals 2019 - Dock Escape

Description As the name of the challenge implies, we are dealing with some sort of Docker escape and we need...

2017

[CVE-2017-16919] MapOS Stored Cross-site Scripting (XSS) - [PT-BR]

MapOS é um sistema gratuito de código aberto para controle de ordens de serviço. Neste artigo descrevemos uma falha de...

WhiteHat Contest 13 - Tuy Hoa

There’s a binary file that checks for a password. $ file re100 re100: ELF 64-bit LSB executable, x86-64, version 1...