Cybersecurity firm Cybereason uncovered an astonishing attack dubbed Operation soft cell haunting at least ten cellular networks based around the globe. Over the course of seven years, they went after all manner of detailed information on just 20 to 30 targets, feeding it back to base and building up an amazingly detailed picture of their daily dealings. The compromise, which the researchers have given a high probability of being a nation-state attack, went to elaborate lengths to nab their high value targets. The criminals reused various techniques to work their way around the various cellular networks with little resistance.”]
Source: https://blog.malwarebytes.com/hacking-2/2019/07/cellular-networks-under-fire-from-soft-cell-attacks/