https://arstechnica.com/information-technology/2022/03/a-mysterious-satellite-hack-has-victims-far-beyond-ukraine/

More than 22,000 miles above Earth, the KA-SAT is locked in orbit. Traveling at 7,000 miles per hour, in sync with the planet’s rotation, the satellite beams high-speed Internet down to people across Europe. Since 2011, it has helped homeowners, businesses, and militaries get online. However, as Russian troops moved into Ukraine during the early hours of February 24, satellite Internet connections were disrupted. A mysterious cyberattack against the satellite’s ground infrastructure—not the satellite itself—plunged tens of thousands of people into Internet darkness.

Among them were parts of Ukraine’s defenses. “It was a really huge loss in communications in the very beginning of war,” Viktor Zhora, a senior official at Ukraine’s cybersecurity agency, the State Services for Special Communication and Information Protection (SSSCIP), reportedly said two weeks later. He did not provide any more details, and SSSCIP did not respond to WIRED’s request for comment. But the attack against the satellite Internet system, owned by US company Viasat since last year, had even wider ramifications. People using satellite Internet connections were knocked offline all across Europe, from Poland to France.