How to use

git clone https://github.com/T-vK/DellBiosUnpackerPOC.git
cd DellBiosUnpackerPOC
./unpack.sh /path/to/my-bios-update-exe

Requirements

Requires bash, git, [ruby or python2], make, cmake (and vbiosfinder in order to extract the vBIOS ROMs from the extracted BIOS files)

Test system

I tested this using Linux (Fedeora 34 x64).
I used this BIOS Update (for the XPS 15 9575 2-in-1): https://dl.dell.com/FOLDER07188382M/1/XPS_15_9575_2-in-1_1.15.1.exe

Ruby port

hdr-unpack.rb unpack is a port of hdr-unpack.py, you can use either one in unpack.sh. They produce the same result.