Cybersecurity Professional | Web Developer | Ethical Hacker
About. Hi, I’m Ratnesh Kumar (also known as rtnthakur) — a cybersecurity professional, web developer, and ethical hacker. I hold a certifications in Certified Ethical Hacker (CEH) from EC-Council and eJPT from eLearnSecurity. I’m currently working as a Cyber Security Analyst, where I’ve been focused on Vulnerability Assessment and Penetration Testing (VAPT) for the past year. My work involves identifying security flaws, testing defenses, and helping organizations stay protected against real-world threats.
Recently, I had the honor of being listed in the Hall of Fame by OLX and Dintero for my contributions to their security programs. I’ve also been credited with 24 CVE IDs for responsibly disclosing critical vulnerabilities.
Cybersecurity is more than a career for me — it’s a passion. As rtnthakur, I’m constantly learning, exploring, and pushing my limits to make the digital world a safer place.
I am passionate about learning and working in cybersecurity with a problem-solving mindset. I am a self-motivated graduate with a Bachelor of Computer Applications.
I have completed CEH v11 and eJPT and participated in Capture The Flag (CTF) competitions on platforms like TryHackMe (THM), Hack The Box (HTB), and others to gain in-depth knowledge about cybersecurity.
- 🎖️ Aspiring to achieve Hall of Fame status in cybersecurity.
- 🏆 Attended 'Tux's Magic Hat: Tricks for Linux Persistence' webinar by CyberWarFare Labs Team.
- 🔍 Constantly researching and improving security solutions for organizations.
- Penetration Testing: Vulnerability assessments & ethical hacking.
- Network Security: IDS, firewalls, and secure architectures.
- Encryption & Data Protection: Implementing AES, TLS, and VPNs.
- Security Audits: Ensuring best practices in IT infrastructure.
| Certificate | Organization | Link |
|---|---|---|
| eLearnSecurity Junior Penetration Tester (eJPT) | INE | View Certificate |
| Certified Ethical Hacker (CEH_V11) | EC-Council | View Certificate |
| Network Defense Essentials | EC-Council | View Certificate |
| EC-Council Certified | EC-Council | View Certificate |
| OWASP Top 10 - 2021 | Cybrary | View Certificate |
| Cyber Security & Ethical Hacker Training Program | Codec Networks Pvt. Ltd. | View Certificate |
| Certificate of Completion for Practical Web Hacking | TCM Training | View Certificate |
| Foundations of Operationalizing MITRE ATT&CK | AttackIQ | View Certificate |
| Threat Hunting | VTF University | View Certificate |
🔹 Working at Terra System Labs Pvt. Ltd. (terrasystemlabs.com)
🔹 Collaborating with cybersecurity professionals like Madhuredra Kumar Chandrabhushan Kumar and Terra System Labs Pvt. Ltd.
- 🔎 Exploring Nikto and web vulnerability scanning.
- 🛡️ Investigating advanced Linux security and persistence techniques.
- 📖 Keeping up with the latest cybersecurity trends and threats.
🚀 Securing the digital world, one network at a time!
Here's a snapshot of my recent GitHub activity: