
All you really need for basic hex carving. My favourite hex editors are (no affiliations or endorsements): You will be doing these functions alot! So choose a hex editor that can do those functions easily or with shortcuts.
Hex/Decimal: be able to switch between these easily. Cut, Copy, Insert Paste, Overwrite Paste. Select: nice if they are right click 'start', right click 'end'. Goto: both absolute and relative address. Search: bytes in hex, locate, count, index, export address. The basic features you will be using a lot of are Basically we want to be able to highlight an area of interest, save. There are a plethora of hex editors available.
OK, so our basic tool on this journey is the humble hex editor.