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SK

Sachin Kumar

Security Researcher

Gurugram, Haryana $100/hr
70
Profile Score

About

I am a security researcher with experience in ethical hacking and vulnerability research. I have a strong passion for cybersecurity and constantly strive to enhance my skills and knowledge in this field.

Skills & Expertise (5)

Defensive Security Offensive Security SIEM platforms Active Directory Attacks Vulnerability Exploits

Work Experience

CTF Player

Hack The Box

May-2023 - present-present

Completed advanced, enterprise-grade labs including Dante, Offshore, Zephyr, RastaLabs, and Alchemy, simulating realistic attack scenarios. Gained hands-on experience with layered defenses, Active Directory exploitation, lateral movement, and persistence techniques. Developed a deep understanding of red teaming, APT simulation, and offensive security methodologies through complex infrastructure challenges.

Security Researcher

HackerOne

August-2022 - present-present

Collaborated with a global community of ethical hackers to identify, analyze, and report vulnerabilities across web, mobile, and cloud platforms. Contributed to reducing organizational risk through responsible disclosure and detailed vulnerability reports. Assisted security teams in remediating issues by providing technical insights and reproducible exploit paths.

Security Researcher

Bugcrowd

April-2024 - present-present

Participated in public and private bug bounty programs targeting enterprise-grade applications. Discovered and responsibly disclosed critical vulnerabilities, including XSS, IDOR, SQL Injection, SSRF, RCE, and Authentication Bypass. Collaborated with triage analysts and internal security teams to ensure validated, well-documented reports that enhance security resilience.

Education

Integrated Master of Computer Applications (MCA) – Cyber Security & Forensics

2018 - 2023 · India

Certifications

Dante Certification (Hack The Box Pro Labs)

Hack The Box · 2022

Certification for completing the Dante Pro Lab, which simulates realistic attack scenarios and advanced penetration testing techniques.

Offshore Certification (Hack The Box Pro Labs)

Hack The Box · 2022

Certification for completing the Offshore Pro Lab, which simulates realistic attack scenarios and advanced penetration testing techniques.

Rastalabs Certification (Hack The Box Pro Labs)

Hack The Box · 2022

Certification for completing the RastaLabs Pro Lab, which simulates realistic attack scenarios and advanced penetration testing techniques.

Zephyr Certification (Hack The Box Pro Labs)

Hack The Box · 2022

Certification for completing the Zephyr Pro Lab, which simulates realistic attack scenarios and advanced penetration testing techniques.

Alchemy Certification (Hack The Box Pro Labs)

Hack The Box · 2022

Certification for completing the Alchemy Pro Lab, which simulates realistic attack scenarios and advanced penetration testing techniques.

CRTP (Assured Security Certified Red Team Professional)

Assured Security · 2021

Advanced certification in red teaming that covers exploit development, post-exploitation, and lateral movement techniques.

OSCP (Offensive Security Certified Professional)

Offensive Security · 2020

Advanced penetration testing certification that demonstrates the ability to bypass security controls and exploit vulnerabilities.

EHE (Ethical Hacking Essentials)

Udemy · 2019

Comprehensive course covering the fundamentals of ethical hacking, including reconnaissance, scanning, and exploitation techniques.

NDE (Network Defense Essentials)

Udemy · 2019

Course covering the basics of network defense, including network security and monitoring, intrusion detection, and incident response.

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Profile Score Breakdown

📷 Photo 0/10
📄 Resume 10/10
💼 Job Title 10/10
✍️ Bio 10/10
🛠️ Skills 10/20
🎓 Education 10/10
⏱️ Experience 5/15
💰 Rate 5/5
🏆 Certs 5/5
Verified 5/5
Total Score 70/100

Profile Overview

Member sinceJul 2025

Skills (5)

Defensive Security Offensive Security SIEM platforms Active Directory Attacks Vulnerability Exploits