Hack The Box ↗ · Root-Me ↗ · 0xWriteups ↗
About / text version
Hey, I'm Lahsen, aka l27sen. I'm a cybersecurity engineering student focused on reverse engineering, binary analysis, and penetration testing. I'm preparing for HTB CPTS and getting started in bug bounty.
I like understanding what the binary actually does, writing a solver to prove it, and leaving a useful writeup behind. My idea of a hobby:
- Reversing: untangling XOR loops, PRNG checks, and the occasional decoy flag.
- Pwn: exploring heap use-after-free bugs and GOT overwrites in CTFs.
- Web: exploring JWT algorithm confusion, insecure deserialization, and authentication logic in labs.
- AI: building local LLM and RAG tools that help explain binary analysis.
Languages: Python, C, Bash, PowerShell; reading x86/x64 assembly.
Reverse engineering: GDB, radare2, Ghidra, IDA.
Pentesting: Burp Suite, Nmap, Metasploit, Sliver.
Hack The Box and Root-Me are where I practice. Follow the links for current progress. My notes live in 0xWriteups.
Every crash is a clue.