Notes on embedded stuff

embedded protocols

Mqtt

it has few security protocols, ACLs : READ, WRITE and READWRITE default is READWRITE

More advanced is PKI certificates, but that’s out of scope.

Paho C LIbrary: github.com/eclipse/paho.mqtt.c

Firmware

binwalk -e extracts -m Recursively extract unzip

grep stuff like password, admin, telnet, etc.

decrypt

• just try to decript with gpg -d

You can do firmware dynamic analysis with QEMU

CTF stuff

hexedit : to edit an hex file also do strings