Ricardo Silva — aka chu

Overview

Hello! I'm Ricardo Silva, also known as chu. I'm passionate about offensive security, working as a pentester and red teamer. I see life as a journey of constant learning, so I dedicate a lot of my time to studying, improving my skills, and sharing what I learn along the way. Outside of security, you'll usually find me around cats

• Name  Ricardo Silva (chu)
• Country  Brazil
• Languages  Portuguese, English
• Interests  hack, cats, travel
• Current work  Offensive Security — Pentester & Red Teamer
• Current CTF team  ADMinions

Socials

• Blog  repo4chu.github.io
• Twitter  @alsoknowaschu
• Github  github.com/repo4Chu
• LinkedIn  in/ricardo-silva

Certifications

Issuer	Certification	Status	Verify
OffSec	Offensive Security Certified Professional (OSCP+)	Achieved	link
Zero-Point Security	Certified Red Team Operator (CRTO)	Achieved	link
Desec	Desec Certified Penetration Tester (DCPT)	Achieved	link
INE Security	eLearnSecurity Junior Penetration Tester (eJPT)	Achieved	link
HackTheBox Academy	—	Working on it :)	—

Awards History

• June 2023
  Top 100 Globally — Hall of Fame
  Issuer: HackTheBox
• January 2024
  First Blood — HTBank (Web Challenge)
  Issuer: HackTheBox
• 12 Apr 2025
  First Blood — User on Nocturnal (Linux Machine)
  Issuer: HackTheBox

Contact

for writeup feedback, or any shit.

alsoknowaschuTwitter / X

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