Claude Code helped unlock an HP laptop BIOS by patching RSA checks and hidden menus
Reddit_2049 · reddit · 2026-07-21
Claude Code was used to reverse-engineer and patch an HP laptop BIOS dump, unlocking hidden setup menus on an HP 15-dw1036ne.
- The author used Ghidra, UEFITool, Unicorn, Capstone, and Python scripts to analyze the BIOS.
- One patch bypasses an RSA-2048 DXE firmware signature check by changing a single branch instruction so verification always succeeds.
- Another patch flips 55 hidden Setup fields from suppressed/greyed-out to visible.
- A third patch makes the Advanced / Power / Debug / Boot tabs appear in the BIOS UI.
- The post includes a Python mod script that reproduces the patches from a stock BIOS dump.
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