The reason behind printers being hacked is this protocol called Internet Printing Protocol which is a specialized Internet protocol for communication between client devices and printers. It allows clients to submit one or more print jobs to the printer or print server, and perform tasks such as querying the status of a printer, obtaining the status of print jobs, or canceling individual print jobs. This runs on port 631. When this is open it is possible for us to print to the printer or even transfer malicious data through it .

Locating and Exploiting LAN Printers :

Toolkit we are gonna use :

git clone <https://github.com/RUB-NDS/PRET> && cd PRET
python2 -m pip install colorama pysnmP

Now for locating the printers we can run python pret.py will start an automatic printer discovery in your LAN.

It is also possible by running an Nmap scan on your whole network, but unfortunately, it might take a longer time. This is because the pret.py scan is focused on the ports which printer communication on by default, thus making it immensely faster.It is also possible by running an Nmap scan on your whole network, but unfortunately, it might take a longer time. This is because the pret.py scan is focused on the ports which printer communication on by default, thus making it immensely faster.pyth