Some users suggested that the messages were fake, but a cybersecurity firm that monitors the internet told Vice that they're legit. "Someone is... blast[ing] raw TCP data directly to printer services across the internet," GreyNoise founder Andrew Morris told Vice. "Basically to every single device that has port TCP 9100 open, and print[ing] a pre-written document that references /r/antiwork with some workers rights/counter capitalist messaging." The individual[s] behind the attack are using 25 separate servers, according to Morris, so blocking one IP won't necessarily stop the attacks. "A technical person is broadcasting print requests for a document containing workers rights messaging to all printers that are misconfigured to be exposed to the internet, and we've confirmed that it is printing successfully in some number of places," he said.
Credits:
https://www.engadget.com/someone-is-hacking-receipt-printers-with-pro-worker-messages-115040881.html
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