The Wall Street Journal identifies a sequel to earlier attacks targeting AT&T and Verizon.
T-Mobile was also targeted by Chinese hackers alongside AT&T or Verizon, The Wall Street Journal reported Friday. Salt Typhoon—the name Microsoft assigned to a hacking group it linked to Chinese intelligence operations—breached T-Mobile’s systems in recent months and obtained access to an unknown amount of customer data.
Citing “people familiar with the matter”, the WSJ describes a sequel to the Salt Typhoon attacks on AT&T, Verizon, and other telecom carriers that it reported on in early October. This campaign relied on advanced techniques to penetrate these firms’ systems for months and then compromise information, including calling metadata and the contents of unencrypted text messages.
An attacker could use the times and phone numbers of calls—the records that AT&T lost in a massive data breach uncovered in July—for a variety of impersonation and spoofing attacks.
