Security Nexus Hub

History

We strive to provide enjoyable and educational lectures using original applications as subjects.

2026年5月25日

Tunnel Tokyo

Learn by Building! Game Security

We held a lesson on implementing basic anti-cheat measures (memory cheat protection / Frida detection, etc.) in a Linux environment using generative AI.

  • •Study Linux memory reading techniques and memory maps (/proc/{}/mem, /proc/{}/maps)
  • •Implement XOR encryption for numeric values in the game
  • •Understand how Frida's hooking functionality works using a learning app
Learn by Building! Game Security screenshot 1
Learn by Building! Game Security

2025年9月14日

Online

Casual Tech Talk

We held an LT session titled 'A talk event where people who love information technology gather'.

  • •Creating iOS ARM64 Debugger with Generative AI
  • •Arbitrary Code Execution in Original Pokémon
  • •Automating Malware Analysis with LLM
  • •Introduction to PacketProxy
  • •TeX Introduction for Engineers
Casual Tech Talk

2025年4月29日 / 7月12日

Tunnel Tokyo/Online

[Beginner to Intermediate] Frida JavaScript Study Session🐈

Based on the content of the first Frida study session, we conducted Frida lessons with more time allocated.

  • •Program analysis using hardware watchpoints
  • •Script implementation methods for Frida version 17 and later
  • •Dynamic analysis considering memory alignment of structures
[Beginner to Intermediate] Frida JavaScript Study Session🐈 screenshot 1
[Beginner to Intermediate] Frida JavaScript Study Session🐈

2024年12月6日

Tunnel Tokyo

Handmade Debugger: First Steps

We conducted a lesson on debugger principles, including memory read/write and implementation of breakpoints and watchpoints.

  • •How to build C/C++ code using Android NDK
  • •Memory read/write methods using ptrace and others
  • •Mechanisms and implementation of breakpoints and watchpoints
Handmade Debugger: First Steps screenshot 1
Handmade Debugger: First Steps screenshot 2
Handmade Debugger: First Steps

2023年12月28日

Online

[For Absolute Beginners] LLDB Even Cats Can Understand

We conducted a lesson on analysis methods using LLDB with three Crackmes as subjects.

  • •Basic LLDB commands and debugging flow
  • •Analysis automation using Python
  • •Analysis of applications with anti-debugging implementations
[For Absolute Beginners] LLDB Even Cats Can Understand screenshot 1
[For Absolute Beginners] LLDB Even Cats Can Understand screenshot 2
[For Absolute Beginners] LLDB Even Cats Can Understand screenshot 3
[For Absolute Beginners] LLDB Even Cats Can Understand

2023年10月2日

Online

[For Absolute Beginners] First Steps with Frida

We conducted a learning session on analysis using Frida, with rock-paper-scissors games and TUI games as subjects.

  • •Explanation of basic Frida usage and concepts
  • •Step-by-step explanation of analysis using rock-paper-scissors games
  • •Applied analysis using TUI games
[For Absolute Beginners] First Steps with Frida screenshot 1
[For Absolute Beginners] First Steps with Frida