Hi,I'am Greejith K

Penetration Tester

I’m a Cyber Security Analyst and Penetration Tester specializing in identifying, exploiting, and mitigating security vulnerabilities across web applications, APIs, networks, IoT, and OT/SCADA environments. With hands-on experience securing enterprise and critical infrastructure systems, I help organizations strengthen their security posture through in-depth assessments, actionable remediation, and continuous improvement.

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About Me

Image of Greejith K

Penteration Tester

I work at the intersection of offensive security, critical infrastructure, and real-world exploitation. My background spans IoT devices, OT/SCADA systems, enterprise networks, web applications, APIs, Active Directory environments, and thick-client applications, with hands-on experience uncovering security flaws across both hardware and software layers. Over the past few years, I have been actively involved in penetration testing engagements for government, healthcare, finance, defense, and education sectors, including security assessments of India’s critical power infrastructure. Being CERT-In empanelled through an accredited organization, I focus on delivering practical, end-to-end security testing that reflects real attacker behavior rather than theoretical risks.

My Journey

Experience

Jan 2024 – Present

Cyber Security Analyst

2024 - Ongoing


Mirox Cyber Security and Technology Pvt Ltd Technopark, Trivandrum, Kerala

  • Performed penetration testing across IoT, OT/SCADA, web applications, APIs, network infrastructure, Active Directory, and thick-client applications.
  • Executed firmware analysis, reverse engineering, configuration reviews, and security hardening across embedded devices and enterprise systems.
  • Performed threat hunting, malware analysis, and delivered detailed PoCs and remediation-focused vulnerability reports.

Achievement

  • Recognized in multiple Hall of Fame acknowledgments across leading organizations, including Zoho, Bosch, and others.
  • Earned 20+ security bounties, demonstrating strong vulnerability research and exploit-finding skills.
  • Successfully conducted penetration testing on India’s top 3 power plants, strengthening critical ICS infrastructure security

Education

2024 - Ongoing
  • Bachelor of Computer Applications Final Year (Amrita Vishwa Vidyapeetham)
  • Higher Secondary 2017- 2019 ( Sree Krishna Higher Secondary School)                                        

My Skills

Penetration Testing

Web & API Security Testing 90%

Embedded Device Security Testing80%

Network Security Testing 80%

ICS SCADA OT Security Testing 90%

Active Directory Security Testing90%

Thick Client Security Testing 90%

Infrastructure Security Testing 90%

Other Expirties

Malware Analysis 80%

Server Hardening 80%

Networking 80%

Windows & Linux Administration 85%

Network Device Configuration Review70%

Python & SQL73%

Latest Project

Keylogger

Keylogger And Chrome Browsing History Stealer

Ransomware

Undetectable Ransomware For Windows

ARP Spoofer

User Friendly GUI ARP Spoofer

BAT XSS

Execution base RXSS Finder

Coming Soon

Work in progress

Coming Soon

Work in progress

Certifications

Cisco Certified Network Associate

From Cisco

Certified In Cybersecurity

From ISC2

Certified Associate Cybersecurity

From Fortinet

Certified Cybersecurity Educator Professional (CCEP)

From Red Team Leaders

210W-07 ICS

From Cybersecurity and Infrastructure Security Agency

Certified Social Engineering Defense Practitioner (CSEDP)

From Secops