School Passwords: I was 14 I think, coded up a basic popup box in VB saying 'Please verify your username and password', the input was sent to a txt file and there was a nice little Netscape Navigator icon to make it seem legit lol. I had the .exe running on startup on maybe 2-3 computers. Over 1 week I had hundreds of passwords including the network administrator pass. :D
I think I did you one better. At my high school, the student computers in our dorms (yes, a weird high school) were on the same network as the computer lab computers. To log onto a computer lab computer, you put in your username, password, and the domain name (STUDENT). We set up a computer in our room named STUDNET and changed a few login boxes in the computer lab to log into STUDNET instead of STUDENT. Several hours later, we had several accounts. Oh Windows 98, how I love thee...
The printers were also on this network. They were all HP printers, they all had the control port open (9001?), and they all had the a DNS name in the form of "...-printer.imsa.edu". A brute-force search of our IP space gave us the IP address of all the printers, and a quick shell-script later, the printers' ready message became "OUT OF WATER" instead of "READY". Every printer on the entire campus, all at once.
Oh, the chaos this caused. Upon walking into the main building, several teachers immediately just had to show me this weird message on the printer. "The one in my office is like this, and so is the one in the computer lab. It's so crazy!" I especially loved watching several PhDs in the math department calling HP to ask where to put the water in. People were talking about this for months, and I don't think anyone ever figured out that it was me.
So yeah. Changing the ready message on HP printers is my favorite hack, and it still probably works.
I think I did you one better. At my high school, the student computers in our dorms (yes, a weird high school) were on the same network as the computer lab computers. To log onto a computer lab computer, you put in your username, password, and the domain name (STUDENT). We set up a computer in our room named STUDNET and changed a few login boxes in the computer lab to log into STUDNET instead of STUDENT. Several hours later, we had several accounts. Oh Windows 98, how I love thee...
The printers were also on this network. They were all HP printers, they all had the control port open (9001?), and they all had the a DNS name in the form of "...-printer.imsa.edu". A brute-force search of our IP space gave us the IP address of all the printers, and a quick shell-script later, the printers' ready message became "OUT OF WATER" instead of "READY". Every printer on the entire campus, all at once.
Oh, the chaos this caused. Upon walking into the main building, several teachers immediately just had to show me this weird message on the printer. "The one in my office is like this, and so is the one in the computer lab. It's so crazy!" I especially loved watching several PhDs in the math department calling HP to ask where to put the water in. People were talking about this for months, and I don't think anyone ever figured out that it was me.
So yeah. Changing the ready message on HP printers is my favorite hack, and it still probably works.