@rynt
Khôi Nguyễn Đăng
@rynt
Security-CTF Player
Joined December 2025
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Khôi Nguyễn Đăng's blogs
Recently published
How I Failed My First Cybersecurity Certification
Dec 24, 2025 · 5 min read · I used to think the ISC2 CC was just a “lightweight” theory-based certification. Three days of revision should have been enough. While struggling with some CTF challenges, I started to feel a bit burned out. I scrolled through LinkedIn and saw peopl...
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A problem forensic in CSCV2025
Dec 21, 2025 · 1 min read · DNSEXFILL Summary problem : I have a PCAP file which contain many DNS capture and two logs file I used the strings command on the PCAP file and noticed many common website here :+1: As I continue scrolling , I found some suspicious strings :+1: Pre...
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