About Me

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3rd-year Computer Security student at South East Technological University (Carlow, Ireland). Founder of EntySec and developer of penetration-testing frameworks (HatSploit, SeaShell) and low-level payloads in C/Assembly. CTF player with 1st place at ZeroDays 2024 & 2025; winner of MIREA Cyberbeathlon (twice). Speaker at PHDays 11 and Offzone 2022. PATCH 2025 alumni; building Cohort, a student discovery platform. 5,000+ stars across open-source projects.

LinkedIn Profile EntySec Website My Blog

Education

September 2023Present

South East Technological University (SETU), Carlow, Ireland

BSc (Hons) in Cyber Crime & IT Security (Expected May 2027). GPA: Y1 88% · Y2 80%. Member of SETUSU Executive Class Representative Council (1+ years).

2012–2019 & 2021–2023

Moscow Private General Education School

2018 to 2019

Polycent Robotics School

2019 to 2021

Moscow State General Education School

2019 to 2023

Moscow School of Programming

Experience

Spring 2025

ZeroDays 2025

CTF Olympiad

1st place with Team Loki (back-to-back winners 2024 & 2025).

Spring 2024

ZeroDays 2024

CTF Olympiad

Participated with Team Loki and achieved 1st place.

Open certificate

Summer 2025

PATCH 2025

Accelerator (Dogpatch Labs)

Alumni. Built Cohort — a student discovery platform connecting students via shared interests and experiences.

May 2022

Positive Hack Days

Cybersecurity Conference

Presented security software including HatSploit; discussed new penetration-testing methods.

August 2022

OffZone 2022

Cybersecurity Conference

Presented research and tools including Fishnet Framework.

Speaker profile

2021 - Present

EntySec

Open-source Software Development

Founder & lead. Built 13+ open-source projects for cybersecurity, red teaming, exploits, and payloads, shared on EntySec’s GitHub.

Spring 2022

NTO Contest

CTF Olympiad

Advanced to the final with Team ShadowLegacy.

Autumn 2021 & Spring 2022

MIREA Cyberbeathlon

CTF Olympiad

Won twice with Team ShadowLegacy.

Open certificate

Autumn 2021

Moscow CTF

CTF Olympiad

Advanced to the final with Team ShadowLegacy.

Autumn 2020, 2021

Ugra CTF

CTF Olympiad

Advanced to the final with Team ShadowLegacy.

Skills

Software Development

From post-exploitation frameworks in Python and payloads in C/Assembly to web platforms in Django/Flask and modern frontends (React/Capacitor).

Penetration Testing

Web application security (RCE, XXE, SSTI, SQLi, XSS), reverse engineering, iOS in-depth security, cryptography, and 4+ years of CTF experience.

iOS Security

Researcher and developer of iOS tweaks/payloads; experience exploiting CoreTrust (iOS 14–16) for post-exploitation.

CTF & A/D Olympiads

Long-time competitor: ZeroDays champion (2024, 2025), multiple finals and wins with ShadowLegacy.

Low-level Programming

Objective-C for macOS/iOS; C for POSIX/Windows; shellcode in Assembly for MIPS, ARM, x86/x64.

Server Infrastructure

Docker, Kubernetes (k3s), WireGuard, Postfix/Dovecot, and AWS (EC2, ALB, SES, Lambda).

Portfolio

Below is the list of my open-source projects that I've developed and currently work on. Most are connected, forming an ecosystem for penetration tests, security research, and CTFs. Click a project name to open its repository/site.

  • All
  • Pentest
  • Exploitation
  • Payloads
  • Misc

Review

During the basic courses, Ivan fully mastered the information, was attentive to issues related to information security, paid attention to digital forensics and the interests of his software.

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Zaitsev Georgy

Professor

Contact

Ivan Nikolskiy

Hacker & EntySec founder

enty8080@gmail.com

+353 83 894 7134