0x01: The Core Toolchain

To analyze ARM binaries on a standard Linux machine (Ubuntu/Debian), we need three categories of tools:

1. Compilers & Build Tools: To create our own binaries for testing.
2. Binutils: A collection of tools to “peek” inside binaries (like objdump and readelf).
3. Cross-Platform Support: To handle ARM code on x86 hardware.

0x02: Terminal Deployment (The Command)

Students should run the following “Master Command” to pull the entire Ocsaly-recommended stack.

Operator Note: We use gcc-aarch64-linux-gnu for 64-bit ARM and gcc-arm-linux-gnueabihf for 32-bit ARM.

sudo apt update && sudo apt install -y \
    build-essential \
    binutils-common \
    gcc-aarch64-linux-gnu \
    g++-aarch64-linux-gnu \
    gcc-arm-linux-gnueabihf \
    gdb-multiarch \
    qemu-user \
    hexcurse

sudo apt update && sudo apt install -y \
    build-essential \
    binutils-common \
    gcc-aarch64-linux-gnu \
    g++-aarch64-linux-gnu \
    gcc-arm-linux-gnueabihf \
    gdb-multiarch \
    qemu-user \
    hexcurse

0x03: Tool breakdown

• binutils: Provides objdump (for disassembly) and nm (for listing symbols).
• gdb-multiarch: A version of the GNU Debugger that can debug almost any CPU architecture.
• qemu-user: An emulator that allows you to run ARM binaries directly on your x86 Linux desktop.
• hexcurse: A terminal-based hex editor for manual binary patching.

0x04: Interactive Lab (Dependency Validator)

In this lab, the student must “install” the correct package by identifying which tool solves which problem.

0x05: Verification Task

Current Objective: Once the installation is complete, verify your tools by checking their versions.

Challenge: Run aarch64-linux-gnu-gcc --version and qemu-aarch64 --version. If both return a version string without errors, your Recon Station is Active.

In the next phase, we will use these tools to perform our first real binary analysis.

0x06: Choosing Your Interface

The “best” editor is the one that stays out of your way. Whether you want a high-tech GUI or a raw terminal interface, the choice is yours.

Option A: Visual Studio Code (The Modern HUD)

VS Code is the industry standard for a reason. It is highly customizable and has a massive library of extensions.

• Best for: Students who want a visual experience with integrated debuggers.
• Recommended Extensions: * ARM Assembly (for syntax highlighting).
  • Remote – SSH (to work on a separate Linux lab machine).
  • Hex Editor (to view binaries directly).

Option B: Vim / Neovim (The Operator’s Choice)

Vim is a “modal” text editor that lives entirely in the terminal. Once you master the keybindings, you can navigate code faster than someone using a mouse.

• Best for: Speed, efficiency, and working on remote servers where a GUI isn’t available.
• Reverse Engineer Edge: Most Linux systems come with Vim pre-installed, making it a universal tool in the field.

Option C: Sublime Text / Notepad++ (The Lightweight Scouts)

Sometimes you just need to open a file instantly without waiting for a heavy IDE to load.

• Best for: Quick edits and viewing large log files.

0x07: Setting the Environment

Regardless of the editor you choose, you should configure it for Cybersecurity Research:

1. Monospaced Fonts: Use fonts like JetBrains Mono or Source Code Pro to ensure 0 (zero) and O (letter) look different.
2. Dark Theme: High-contrast dark modes reduce eye strain during long “Night Ops.”
3. Terminal Integration: Ensure your editor allows you to open a terminal window at the bottom of the screen. You will constantly be switching between writing code and running gcc or readelf.

0x08: Interactive Lab (The Interface Selector)

Match the editor to its operational advantage.

0x09: Final Mission Task

Current Objective: Install your editor of choice. If you choose VS Code, install the C/C++ and ARM Assembly extensions. If you choose Vim, try running vimtutor in your terminal to learn the basic movement commands.

Challenge: Open the write64.s file we created in the last phase. Ensure that your editor correctly highlights the assembly mnemonics (like mov, ldr, and svc).