Hein Andre Grønnestad

Hi! :)

This page acts as a casual résumé and showcase of my hobby projects and interests.

Hobby Projects

Code Deck

A cross platform and open source alternative to the official Stream Deck application.

Commodore 64 Emulator

An educational Commodore 64 Emulator written in C#. Featuring implementations of the MOS6510 CPU, the VIC-II video chip in character mode and a basic emulation of the SID audio chip.


Whack-An-Ernst is a “Whack-A-Mole”-inspired game for the Elgato Stream Deck.

Nissan Leaf IoT Dashboard

C# NissanConnect library and ESP8266 code powering a Nextion HMI display used to monitor and control a Nissan Leaf remotely.

More Projects

Information Security

I have a deep understanding of computer systems and information security, both as a software engineer and as a red team ethical hacker.

CTF Writeups

I sometimes participate in CTFs. Here are some of my writeups from past ones:

Year Name Team Placement
2022 Equinor CTF 2022 Buttpug 19 / 125
2022 Sikkerhetsdagen 2022 CTF @ UiA (Norwegian Writeups) hag 6th overall / 3rd by points (offsite)
2022 HTB Cyber Apocalypse 2022 hag 883 / 7024
2021 River Security Xmas Challenge hag  
2021 Equinor CTF 2021 IK 12 / 79
2021 OP Holmgang IK 22 / 188
2021 H@ctivityCon hag 210 / 2527
  TryHackMe hag Top 1%

eJPT Certification

I am a certified eLearnSecurity Junior Penetration Tester.

Certificate Verification: https://www.elearnsecurity.com/certification/verify?c=751496b8-eada-4937-b04e-2a160c5a8e10


I regularly use TryHackMe to practice me ethical hacking skills and learn new ones: