Circles - S0602 (c6a07c89-a24c-4c7e-9e3e-6153cc595e24)
Circles reportedly takes advantage of Signaling System 7 (SS7) weaknesses, the protocol suite used to route phone calls, to both track the location of mobile devices and intercept voice calls and SMS messages. It can be connected to a telecommunications company’s infrastructure or purchased as a cloud service. Circles has reportedly been linked to the NSO Group.(Citation: CitizenLab Circles)