NAKUL
UPADHYAY
UPADHYAY
// @ctflover · Red Teamer & HTB Addict
300+HTB Machines
5Pro Labs
2Certs
∞Curiosity
➜ ~ $ whoami
nakul upadhyay
➜ ~ $ cat role.txt
offensive security enthusiast
red team · maldev · AD pwner
➜ ~ $ cat location.txt
India 🇮🇳
➜ ~ $ cat status.txt
open to opportunities
// about_me
I break things for fun — and occasionally for education. I'm an offensive security
enthusiast deeply focused on Active Directory attacks, red team operations,
and malware development. I document my journey through CTF writeups,
HTB machine walkthroughs, and the occasional deep-dive into Windows internals.
When I'm not rooting boxes, I'm writing C code that makes
Windows Defender very uncomfortable.
// skill_matrix
Active Directory Attacks
Penetration Testing
Red Team TTPs
AV / EDR Evasion
Malware Dev (C / NTAPI / WINAPI)
Scripting (Python / Bash)
// certifications_&_labs
certification
CRTO
Certified Red Team Operator — Zero-Point Security
ACHIEVED
certification
CPTS
Certified Penetration Testing Specialist — HackTheBox
ACHIEVED
certification
CRTE
Certified Red Team Expert — course complete, exam in progress
IN PROGRESS
htb pro lab
RastaLabs
Advanced AD red team simulation environment
COMPLETED
htb pro lab
Offshore
Multi-domain enterprise network simulation
COMPLETED
htb pro lab
Cybernetics
Advanced adversary simulation lab
COMPLETED
htb pro lab
Zephyr
Intermediate AD-focused pro lab
COMPLETED
htb pro lab
Dante
Full penetration testing environment
COMPLETED
// arsenal
// journey
2022 — PRESENT
Independent Security Researcher
300+ HTB machines · 5 Pro Labs completed · writeup blog · custom C tooling
2025
CRTO & CPTS — Achieved
Passed back-to-back — red team ops and enterprise pentesting validated
ONGOING
CRTE — Exam Pending
Course fully completed · preparing for retake
// find_me