How to cut the firmware and bootloader from the dump?

Question

linux

Welcome all. It is necessary to cut the firmware binaries (specifically OpenWRT) from the SquareFS flash drive dump. I know how to do it through HEX using offsets. Is it possible (and how) to find these offsets yourself, or perhaps one of you knows them?
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fayloobmennik.cloud/7169474 //dump itself, password lor

Answer 1

You probably need a firmware mod kit.
The composition includes binwalk, which will find what is what by signatures, and a bunch of different versions of "extractors" for different FS. It will unpack itself everything it can (usually - rootfs), pack it itself (after your changes), if you want.

Answer 2

we can just download images of file systems from the site openwrt ??

Answer 3

What kind of iron? you need to know the size of the partitions and their location, then cut the partition with fw.