Hey Null Byte!
I go to an old highschool, built in the mid 1950's, and the tech is ancient. Most of the PA systems, cameras, etc are wired through the walls. The police at our school have a central control room where all the security data runs to, mostly wired in. Our wifi network is fairly nice and recent, but still runs WEP, so not too secure. Unfortunately, the walls are so old and thick that the wi-fi has a hard time getting through. (Also I was thinking that maybe because the school was so old, most of the tech didn't exist to hardwire into the walls, so there's a lot of exposed pipes containing wires) All of the wiring makes it hella hard to hack, but an old school also comes with some advantages: The computers run old and insecure windows OS's, we're talking Windows Vista old. The school also has ancient locks on the door, some with pins that are already set so picking them would take seconds. Similarly, there are class rooms with ethernet ports left unprotected for hours. There's also huge gaps in security when it comes to roof access and few external cameras. There are drop ceilings as well, and easy to gain access to. The electrical boxes are unsecurely locked and sometimes just completely forgotten about. And not all the computers are wired into the network, they still use the wifi and we have some Mac computers that use AirDrop.
My school is near a college built in 2014, filled with wireless connections and students the leave accounts logged in and will connect to anything they see, and I've enjoyed screwing with that. But that's what I thought was so interesting about my school, it's old, wired tech makes it an interesting project. So far my ideas have been:
1: Pick the locks to one of the old computer labs, plug in my BadUSB into the computers and remotely control them from my computer.
2: Try finding an PE system or fire alarm that aren't watched by camera (Or get roof access and disable them from the back) and opening up the PE system/fire alarm and hooking up a Raspberry Pi into it. (Also how badass would a wired hacking tutorial series be? I don't believe that null-byte has a series yet, but if anyone has a link to one or would be interested in writing a series on it, please let me know!)
3: Do essentially the same, except opening up one of the drop ceiling and doing the wiring from there.
4: Plugging something malicious into the ethernet ports? (I don't know if this would actually work, or if these kinds of exploits exists, pardon my noob.)
5: Accessing the campus police radios via connecting a radio listener into the chatter, hooking it up to a discrete power supply and streaming it home.
6: Any kind of wifi hacking the old and insecure networks.
I thought the Null Byte community would have some interesting ideas for hacking these ancient systems, thanks!
(I know the dangers of hacking government property and I'm aware that this transcends into Grey Hat hacking, this is just a thought experiment for the community that I would follow through with. Probably.)