Personnel File CASE No. 036
Gunyakit Sukkasem
alias Ar3mus · OSCP+ · CPTS · Penetration Tester · CTF Player
- Base Thailand
- Since 2019 (7 yrs)
- Web ar3mus.pages.dev
- GitHub github.com/gunyakit
- LinkedIn linkedin.com/in/gunyakit/
- Hashnode hashnode.com/@Ar3mus
- Medium medium.com/@gunyakit

Summary
Penetration tester from Thailand focused on web applications, networks and Active Directory. Active in the CTF scene since 2019, with 12+ certifications (OSCP / OSCP+, HTB CPTS and more) and 7 years of hands-on competition experience. I break systems to understand them, then write up exactly how — 53 case files and counting.
Core competencies
Offensive
Web application exploitation · Network penetration testing · Active Directory attacks · Privilege escalation (Linux / Windows) · Pivoting & lateral movement
Supporting
Digital forensics · Steganography · Professional report writing
Tooling
Burp Suite · nmap · BloodHound · Metasploit · Linux command line
Certifications
- OSCP+ · OffSec Certified Professional+ OffSec · #180762108
- HTB CPTS · Certified Penetration Testing Specialist Hack The Box · #HTBCERT-BAA1A42B03
- CompTIA Security+ (ce) CompTIA · #abca74de3153452b93cfb94f404faced
- eJPT · Junior Penetration Tester INE · #122190596
- KLCP · Kali Linux Certified Professional OffSec · #192146430
- OSCP · OffSec Certified Professional OffSec · #180762094
Also CRT-ID, CRTA, AD-RTS, CELMS, CWST, CWST.
Selected competitions
- TB-CERT Cyber Combat 2025
- RTARF Cyber Warrior Contest 2025
- Cyber Range Thailand 2024
- Thailand Cyber Top Talent 2024
- Blue Guardians: A Defensive CTF Challenge 2024
- TB-CERT Cyber Combat 2024
- RTARF Cyber Warrior Contest 2024
- RTAF Cyber Operations Contest 2024
- STDiO CTF 2023
- TB-CERT Cyber Combat 2023
- Thailand Cyber Top Talent 2023
- RTARF Cyber Warrior Contest 2023
More 12 further competitions on record in the archive.