A big cyberattack attributed to groups backed by the Chinese government has telecom providers worried. In this new report, investigators have determined that the group, known as Salt Typhoon, has had months-long access into the network infrastructures of companies like AT&T, Verizon, and Lumen Technologies. That access includes visibility over the infrastructure used for lawful intercept, which is the Internet version of tapping a phone. Per the report, the Salt Typhoon hackers appeared to be engaged in a data collection mission, trying to obtain as much data as possible from US businesses as well as those that they do business with.