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<main>
<section class="markdown-container">
<img src="../pfp.jpg" class="align-to-right" alt="elleoma" width="200" />
<p>I’m a Ukrainian student and a unix/linux & open-source enthusiast, trying to get into cybersecurity, gain
some practical skills.</p>
<img src="pfp.jpg" class="align-to-right" alt="elleoma" width="200" />
<p>I’m a Ukrainian student and a unix/linux &amp; open-source enthusiast</p>
<p>Specialized in Cybersecurity, Penetration Testing, Red-Teaming, Bug-Bounty hunting</p>
<h2>My skills are:</h2>
<ul>
<li>Cybersecurity</li>
<li>Penetration testing</li>
<li>Low-level programming: C, Rust, Assembly (RISC-V, x86-64), C++, Zig</li>
<li>Low-level programming: C/C++, Assembly (RISC-V, x86-64, ARM), </li>
<li>Malware analysis/development</li>
<li>Reverse engineering (IDA, Ghidra, Binary Ninja)</li>
<li>Self-hosting</li>
<li>Malware developmnet</li>
<li>Reverse engineering (IDA, Ghidra, NinjaBinary)</li>
<li>A little bit of 3D</li>
<li>A little bit of game development</li>
<li>DevOps</li>
<li>A little bit of 3D (Blender)</li>
<li>A little bit of game development (Unity, UE5)</li>
</ul>
<hr />
<h2>Some projects I have</h2>
<h2><a class="post-title" href="https://github.com/elleoma/facinus" target="_blank">Facinus</a></h2>
<p>Since our college switched from Windows to Ubuntu, I had a cool idea to remotely control my classroom PCs.
</p>
<p>I discovered <a href="https://gsocket.io/" target="_blank">gsocket.io</a> and started developing a tool that deploys a local web admin panel to
collect logs from connected clients.</p>
<p>I used an Ubuntu VM in QEMU and Bash scripted everything with some help of AI.</p>
<h3>OS-in-1000-lines</h3>
<p><a class="post-title" href="https://github.com/elleoma/os-in-1000-lines" target="_blank">OS Repo</a></h2>
<p>My implementation of <a href="https://operating-system-in-1000-lines.vercel.app/en">Operating System in 1000 lines</a> by <a href="https://www.shuwasystem.co.jp/author/a269003.html">Shinya Yanagita.</a></p>
<p>A small operating system written from scratch for RISC-V CPU architecture.</p>
<p>This project will have basic context switching, paging, user mode, a command-line shell, a disk device driver, and file read/write operations in C.</p>
<p>And also I'll try to add some more functionality to it.</p>
<p>Right now I'm still working on basic stuff before implementing something new.</p>
<p>I'm still learning C and Assembly, the RISC-V instruction set is new to me.</p>
<hr />
<h2>Cybersecurity</h2>
<p>I’ve been into cybersecurity for about 2 years now. I started with the normie setup — Kali Linux
dual-booted next to Windows, learning through trial and error.</p>
<p>Eventually I spent more time on Linux, moved to KDE, configured everything myself, riced my terminal. Later
switched to Arch and Hyprland.</p>
<p>I still have lots to learn, and I’d love to document all the tools and techniques I come across.</p>
<p>Have experience with web penetration testing as well as Red Teaming in general</p>
<p>Know and use in practice many different tools/tecniques for tests, favorite ones: </p>
<ul>
<li>Reconnaissance: ffuf, subfinder, httpx</li>
<li>Web pentest: Burp Suite (OWASP ZAP), dalfom, curl, intersect, manual scripting (with python)</li>
<li>Lateral movement: impacket (windows), linpeas.sh (linux), bloodhound, netcat, chisel and maany-many more.</li>
<li>Reverse engineering &amp; Binary exploitation: mainly Ghidra, IDA Pro, strace, strings, gdb etc.</li>
<li>Persistence: gsocket, segfault (thc.org), process hiding etc.</li>
</ul>
<p>There's still big room to improve since there's insane amount of different fields to explore and that's what I'm trying to do.</p>
<h3>HackTheBox</h3>
<h4><a class="post-title" href="https://app.hackthebox.com/profile/1915061" target="_blank">My HTB profile</a></h4>
<p>HTB gave me that initial hands-on boost I needed. As of right now I’ve solved more than 50 boxes (3 of them
“Insane”: DarkCorp, Mist, and MassGarden).</p>
<p>HTB gave me that initial hands-on boost I needed. As of right now I’ve solved more than 50 boxes (4 of them
“Insane”: DarkCorp, Mist, MassGarden and Cobblestone).</p>
<p>I like to solve different challeneges there, especially reverse engineering, web and pwn.</p>
<p>Even though I sometimes rely on writeups and walkthroughs, I learn a lot from the infrastructure behind
each box.</p>
<hr />
<h2>Some projects I have</h2>
<h3>Facinus</h3>
<a class="post-title" href="https://github.com/elleoma/facinus" target="_blank">Repo</a>
<p>Since our college switched from Windows to Ubuntu, I had a cool idea to remotely control my classroom PCs.
</p>
<p>I discovered <a href="https://gsocket.io/" target="_blank">gsocket.io</a> and started developing a tool that deploys a local web admin panel to
collect logs from connected clients.</p>
<p>I used an Ubuntu VM in QEMU and Bash scripted everything with some help of AI.</p>
<h3>OS-in-1000-lines</h3>
<p><a class="post-title" href="https://github.com/elleoma/os-in-1000-lines" target="_blank">Repo</a>
<p>My implementation of <a href="https://operating-system-in-1000-lines.vercel.app/en">Operating System in 1000 lines</a> by <a href="https://www.shuwasystem.co.jp/author/a269003.html">Shinya Yanagita.</a></p>
<p>A small operating system written from scratch for RISC-V CPU architecture.</p>
<p>This project will have basic context switching, paging, user mode, a command-line shell, a disk device driver, and file read/write operations in C.</p>
<p>And also I'll try to add some more functionality to it.</p>
<p>Right now I'm still working on basic stuff before implementing something new.</p>
<p>I'm still learning C and Assembly, the RISC-V instruction set is new to me.</p>
<h3>Reverse engineering book translation</h3>
<p><a class="post-title" href="https://github.com/elleoma/reversing-ukrainian/tree/ukrainian-translation" target="_blank">Repo</a>
<p><a class="post-title" href="https://elleoma.github.io/reversing/" target="_blank">Book translation</a>
<p>This is a book from <a href="https://twitter.com/mytechnotalent" target="_blank">@mytechnotalent</a> (English version <a href="https://0xinfection.github.io/reversing " target="_blank">here</a>) that I decided would be cool to translate in Ukrainian with automated python script and LLM hosted locally</p>
<p>I generally moved from outdated gitbook to honkit for publishing this as an E-book, created a python script for
parsing markdown files and translating using LTEngine and Llama LLM (8b params) hosted locally.</p>
<p>I was also able to make an automatic push to my github pages on each update</p>
<hr />
<h2>Bug bounty</h2>
<p>Bug bounty is fascinating — legally hacking in-scope apps and possibly earning money.</p>
<p>But as a beginner, it’s tough. Recon is time-consuming, and rewards don’t always justify the effort unless
you're really skilled.</p>
<p>I’ve tried a few programs but haven't found any serious vulnerabilities yet. I plan to shift my focus
toward learning specific attack techniques and improving my skills first.</p>
<p>But there is a big amount of knowledge I'm gainining, when exploring all the different aprroaches these companies use to secure themselves.
It doesn't always bring financial benefits, but it always provides practical experience working with real targets.</p>
<p>I like to compare bug-bounty to a chess game: you have several 'openings' but with each step you open more available steps to play around.</p>
<hr />
<p dir="auto">
<a target="_blank" rel="noopener noreferrer nofollow" href="https://elleoma.github.io/self-host.png">
<img src="../self-host.png" alt="My self-hosting setup" style="width: 280px;" class="align-to-right">
<img src="self-host.png" alt="My self-hosting setup" style="width: 280px;" class="align-to-right">
</a>
</p>
<h2>Self-hosting</h2>