SilentAir Hijacks Asian Telecom Networks to Intercept SMS 2FA Codes and Spy on Taiwanese Users

Enea says a state-level spying group it calls SilentAir used hacked equipment inside mobile operators in at least six Asian countries to attack the SS7 and Diameter signaling networks, diverting selected targets' calls and texts — mostly in Taiwan, including political and government VIPs — and intercepting SMS two-factor authentication codes in some observed cases. Enea assesses with high confidence that SilentAir is a state actor and links it to China only with low confidence, based on its Taiwan focus and working hours; the group has been disrupted for now but could return.