Friend of a friend story
...so no idea if it's true but it was a bloody good hack if it was.
Iraq. First gulf war. CIA manage to intercept an order for laser printers going to a known front company for Saddam's military. It inserts an additional little "surprise" into them and lets them get sent out.
First days of the war. Bombers go out - normal ones - to take out the AA sites.
As the first wave appears on the radar they don't try and hide. Fairly anti-stealth you say?
All the AA systems go into single user mode and have to fire with no radar and no other systems reachable. In the confusion 90% are bombed to bits.
The surprise added was a small chip that snoops the ethernet they were connected to and if they saw lots of targetting info from radar systems then just to flood the network with a denial of service.
Yup - the CIA had figured out that they had added laser printers onto the same simple network all the AA and radar was on.
Who checks inside a printer that all the chips there are *supposed* to be there?