Offensive Security Engineer, Developer and H4cker.

Hello! I'm Lee Hwan, better known online as HAHWUL. An Offensive Security Engineer and hacker based in South Korea.

AUGUST 26, 2026

I've joined the Kemal Core Team!

A Security Report, and What Came After

Writing

All posts

JUN 30, 2026 Rust and Crystal: My Two Main Languages Balancing Popularity and Quiet Power
APR 19, 2026 Traveling with Hermes in Japan My Remote Setup and Project Workflow While Traveling
MAR 22, 2026 Building AI-Friendly CLIs JSON-First Design with Schema Commands

Notes

All notes

Claude Code Remove co-authored-by when committing

Projects

All projects

Dalfox XSS scanner and utility focused on automation

Gori Intercepting proxy and pentest toolkit for the terminal

OWASP Noir Attack surface detector via static analysis

Hwaro Lightweight static site generator