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yujin-xin/README.md

Hello! I'm Yujin

In my free time / day off, I play CTFs, work on small cybersecurity projects, and write write-ups to improve my skills, which helps reinforce what I learn.

About me

  • 🎓 BS Information Technology - Data Networking
  • 🛡️ Network and Security Operation Center (present)

Skills

  • ✅ Networking: TCP/IP Stack, Routing and Switching
  • 🧠 Programming Languages: Python, JavaScript, Java, Bash, PowerShell
  • 🎯 Tools: SIEM (Wazuh, FortiSIEM, StellarCyber), EDR/XDR (Sophos XDR, Microsoft 365 Defender), Nessus (vulnerability assessment), FortiAnalyzer, FortiManager, Wireshark, VirtualBox/VMware
  • 🔍 Concepts: EDR/XDR, SIEM, Packet Analysis, Network Security, Threat Hunting, Automation

Projects

  • CTF Write-ups: (Ongoing) Solutions to Capture The Flag challenges focused on blue team operations
  • File Integrity Monitoring Web App: A web-based application using ExpressJs to monitor file changes and detect unauthorized modifications for security monitoring
  • SIEM Implementation - (Underdevelopment) Showcasing Wazuh for real-time log analysis, alerting, and threat analysis
  • IDS/IPS - (Underdevelopment) Building an IDS/IPS using Snort with custom rules for intrusion detection and prevention

⚡ Fun Fact

  • Sideline: I also like developing web applications and IoT systems, a passion I pursued as a sideline in college, which helped me quickly adapt to new technologies despite limited experience.
  • Beyond Academics: I like running, I do play instruments, and I like reading psychology and self-help books.

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  1. FIM-Web-based FIM-Web-based Public

    File Integrity Monitoring application. A web based FIM tool that tracks modified files from base folder

    JavaScript

  2. IDS-for-MITM-attack IDS-for-MITM-attack Public

    A simple Python-based tool that demonstrates how eavesdropping works by detecting suspicious network activity commonly associated with MiTM attacks.

    Python

  3. File-integrity-monitoring File-integrity-monitoring Public

    CLI version of File Integrity Monitoring application. A portable python based FIM tool that tracks modified files from base folder

    Python

  4. slow-Loris-attack slow-Loris-attack Public

    A Python-based script that simulates a Slowloris Denial-of-Service attack by creating multiple threads that send slow, incomplete HTTP requests to overwhelm the target web server.

    Python