Discover-Tech, an Israeli advertising firm previously linked to the delivery of zero-click spyware, is the top bidder for Starlink ad impressions in 105 countries, according to a new report from Reuters. Researchers say it all points to a large-scale tracking effort aimed at users of SpaceX’s satellite internet service.

John Scott-Railton, a senior researcher at the University of Toronto’s Citizen Lab, posted on X that data from TrendAI suggest the existence of a “worldwide surveillance op targeting @Starlink users.”

Discover-Tech was previously named in Citizen Lab’s October 15th report as the buyer of ordinary-looking ads that delivered Candiru spyware to devices at Al Jazeera without any user interaction. Candiru is an Israeli mercenary spyware vendor (now rebranded as Integrity Labs) that develops tools capable of silently compromising phones and computers. In 2021, the U.S. Department of Commerce’s Bureau of Industry and Security added Candiru to their trade restriction list, known as the Entity List, over concerns it supplied surveillance technology used against journalists, activists, and government officials.