Detailed Summary Today I took a deep, hands-on dive into x86-64 Linux system calls by writing and debugging a pure assembly “Hello, Assembly!” program with no C library. I started with a simple NASM program that uses the modern syscall…
I installed angr, a powerful open-source Python framework for binary analysis and symbolic execution. It lets me automatically explore different execution paths in a program without needing real inputs for every case. How I Installed It I created a virtual…
Today’s session started with a red banner in WP Mail SMTP and ended with a fully authenticated mail pipeline running through my own domain. Here’s the trail, and what I’d tell someone else hitting the same wall. The Symptom WP…
Why install them Tool Primary Reason for Installing Main Usefulness Compiler Explorer Instantly see how high-level code (C) turns into assembly across many compilers and architectures Teaching, learning, quick experimentation, comparing compiler output, understanding optimization Binary Ninja Free Interactive reverse…
I recently went through Just Enuf Java v2, a concise set of Java course notes written by Professor Jason Leigh at the University of Hawaiʻi at Mānoa — who was my professor there. It covers the core fundamentals of Java…
I installed Ghidra 12.1.2, the free and open-source reverse engineering framework originally developed by the NSA. It is one of the most capable free tools available for analyzing compiled binaries. How I Installed It on Debian I downloaded the official…
Woke up to a SANS ISC diary about a new WordPress core vulnerability — CVE-2026-63030, “wp2shell.” Unauthenticated SQL injection, no plugin required, straight into core. The kind of bug that makes you check your own site before you finish your…
I wanted to run OCaml on seL4. Not “install OCaml” — actually get it running inside a virtual machine hosted by seL4, the formally verified microkernel that’s supposed to be one of the most secure pieces of software ever written.…
Nand to Tetris (also known as The Elements of Computing Systems) is one of the most unique and rewarding computer science courses available. It takes you on a hands-on journey where you build a complete, general-purpose computer system — starting…
64-bit Version Register Purpose in Our Program Why this specific register? RAX Holds the syscall number Convention: First argument for syscalls RDI Holds file descriptor (stdout=1) Syscall argument #1 RSI Holds address of the string Syscall argument #2 RDX Holds…