The Electronic Frontier Foundation (EFF) has released a free, open-source tool called Rayhunter, designed to detect fake base stations (IMSI catchers)—also known as Stingrays.
These devices masquerade as legitimate cell towers to force mobile phones to connect to them, thereby gaining access to their data, tracking their location, and potentially intercepting communications.
Rayhunter: как превратить бюджетный роутер в детектор цифровой слежки
Компактный инструмент мгновенно разоблачает шпионские вышки связи.