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Hi 👋, I’m Helvio Junior (aka M4v3r1ck)

Cybersecurity Researcher && Trainer && Penetration Tester


  • 📔 I’m co-founder and CEO of Sec4US
  • 📚 I’m currently learning Low Level stuffs and studing to OSEE
  • 🔖 I’m the first to earn OSCE3 in Latin America
  • 🔖 I hold the majors offensive security certifications OSCE3, OSEP, OSED, OSWE, OSCE, OSCP, eMAPT, eCXD, CEH
  • 📝 I regularly (or not) write articles on https://www.helviojunior.com.br
  • 💬 Ask me about buffer overflow, assembly, shellcoding, binary exploitation, exploit dev, malware dev, network, mobile pentesting and Source Code Review and so on
  • 📫 How to reach me helvio.junior@sec4us.com.br

Connect with me:

helviojunior Sec4us YouTube

Creator of 🇧🇷 Brazilian Cyber Security Certifications:

osee prep osce3

Some Badges:

osee prep osce3 osde osep oswe osce3 osce3

My public presentations in Brazilian language (PT-BR):

Note: Only on Brazilian language (Portuguese)


Note: Only on Brazilian language (Portuguese)