About

January 01, 2024 Arjen Glas 1 min read

whoami

Hi, I’m Arjen Glas — an Ethical Hacker and Security Enthousiast based in the Netherlands.

I started my career as a sysadmin before moving deeper into cybersecurity. In 2024, I earned the OSCP certification and now spend most of my time working on penetration testing, infrastructure security, and building tools for offensive research.

This blog is where I document my research and share guides on the tools and techniques I work with.

Certifications & Training

  • OSEP — Offensive Security Experienced Penetration Tester (2025)
  • OSWP — Offensive Security Wireless Professional (2025)
  • OSCP — Offensive Security Certified Professional (2024)
  • Optisec Pentest Professional — Optisec

What I Work On

  • Penetration Testing — Web applications, cloud environments, Azure audits
  • Active Directory — Focusing on internal assessments, misconfigurations, and privilege boundaries
  • Tool Development — Custom BoFs (Beacon Object Files), Python tooling, Havoc C2 modules
  • CTF / HTB — Regular player on HackTheBox and CTF competitions

Social