Residents of Melbourne suburb Pakenham have been the unfortunate recipients of the malware-laden thumb drives. The USB drives are believed to be extremely harmful and members of the public are urged to avoid plugging them into their computers or other devices. The method was most infamously used in Stuxnet a joint US/Israeli operation to disrupt systems at the Natanz uranium enrichment facility in Iran, and other victims of USB attack have included the United Nations Nuclear Agency in the past. Astronauts have even transported malware-infected USB sticks up to the International Space Station.”]
Source: https://grahamcluley.com/danger-usb-police-warn-malware-letterbox/