[Salt Typhoon](https://attack.mitre.org/groups/G1045) is a People's Republic of China (PRC) state-backed actor that has been active since at least 2019 and responsible for numerous compromises of network infrastructure at major U.S. telecommunication and internet service providers (ISP).(Citation: US Dept. of Treasury Salt Typhoon JAN 2025)(Citation: Cisco Salt Typhoon FEB 2025)