02 / about
I'm Sergio, an offensive security student based in Seville, Spain, currently in the final year of a vocational degree in network and systems administration (ASIR). My focus is penetration testing: Active Directory, web applications and wireless networks.
I hold the OSCP+, OSWP and BSCP, all earned in 2026. This blog is where I document how I prepared for each certification, what worked, what did not, and the techniques I pick up along the way.
04 / training & labs
- 130+machines rooted across Hack The Box and Proving Grounds
- 273PortSwigger Web Security Academy labs, all of them
- 100mystery labs before sitting the BSCP
Platforms
- Hack The BoxActive Directory and assumed-breach machines
- OffSec Proving Grounds PracticeBulk of my OSCP machine list
- PortSwigger Web Security AcademyAll 273 labs completed, plus 100 mystery labs
- WiFiChallenge LabsVirtualised Wi-Fi attack labs (WPA, WPS, Enterprise)
Courses and challenge labs
- OffSec PEN-200Course, all module labs, Medtech, Secura and the OSCP A/B/C sets
- OffSec PEN-210Wireless attacks course
05 / latest posts
// first posts coming soon