Right now, I am working as a freelance, looking for companies and startups to work with or conduct researchs.
I am interested in projects focused on:
I enjoy traveling, meeting new people from different countries and explore new cultures. Also, I enjoy taking pictures and learning about photography.
During University I learnt about security by myself and with the help of the people from ACM, where I started imparting my first workshops. Durign this period I had the opportunity to assist to several congresses in Spain like Navaja Negra, FAQin, MorterueloCon or Hack&Beers.
Furthermore, I also did an internship in the cybersecurity lab of the university, where I learnt how to reverse engineer malware (Ransomware) and write a technical report about a sample.
I did my Erasmus in Krakow, where I set up an international cybersecurity group of students to exchange knowledge and play CTFs.
For my final project I developed a botnet for Android using third party services as communication bridge between the nodes and the manager of the infected devices. This project combines symmetric and asymmetric cryptography and steganography to cover the exchanged messages. Full Project (Spanish only)
Apart from that I was an active member of the theater association.
September 2020 -
Senior Security Analyst | Pentester
June 2018 - October 2019
Pentester | Red Team
December 2016 - July 2017
March 2016 - June 2016
Backend Programmer | Danjgo - Python
September 2014 - June 2017
Robotics and programming teacher
November 2019 - May 2020
Sept. 2011 - June 2018
During a MuerterueloCon (cybersec conference in Cuenca, Spain) I participated in a talk during the Hack&Beers where I spoke about some attacks developed for Android where an attacker could install malicious apps into the phone of a victim using the Ovipositor device hidden in a phone charger.
11 February 2017
H&B Cuenca, Spain
I gave this workshop thanks to the ACM association of my faculty, where I explained how could we use BurpSuite to analyze the security of a web.
10 October 2016
ACM - ETSIINF, UPM IT Faculty of Polytechnic University of Madrid, Spain
This is the final project that I developed as final project for the university. It is a botnet for Android that uses third-party services and existing services to support the communication between the manager of the botnet and the malware. It combines symetric cyptography to encrypt the orders, steganography to hide in pictures that are attached to an email and it is modular, allowing the bots to receive a piece of code, compile it in Runtime and execute it.
For the project of the botnet for Android, I was needing a steganography library supporting Java and Python. Because I couldn't find any library that satisfy my needs, I decided to program my own.
This is a small piece of malware developed for a contest about funny programs. The aim of this program is to alter the content of the text files in a way that for every found word, it keeps the first and the last letter and swap the letters in the middle randomly. So it is possible to be read, but it does not make sense. For example, the world "cybersecurity" could turn into "ctbrysecrueiy".
There is a project called Phoenix Ovipositor that consists in a Teensyduino with a female a male USB end. My work was to use this device to perform attacks against Android Devices developing scripts to retrieve and writes, and even install apps on the phone.
This attacks and scripts are shown and explained in the talk that I gave at Hack&beers.
There was a bug happening in the webpage of the official dictionary of the Spanish Real Academy that allowed you to inject HTML code in the URL and create fake definitions. This way, I reported the problem to them and in the meanwhile, I created a webpage that was allowing you to craft your own definition, but it wasn't modifying the content of their database, it was a reflected injection.
22 May 2019: First report
(Approximate) 20 November 2019: Vulnerability fixed
Update (25 November 2019): Apparently the bug is still present, and despite the web is a bit slow rendering, it works.
A vulnerability present in an important website of France was allowing to access to the uploaded documents by the users. This bug was leaving more than 6 million sensitive documents exposed.
30 October 2019: Report the vulnerability to the Cert of France
30 October 2019: Answer from the Cert of France
(Approximate) 15 November 2019: Vulnerability fixed