T-Mobile, the third-largest telecommunications carrier in the United States, announced on August 17 (local time) that a large number of customer data had been stolen in a highly sophisticated attack on its network.
Preliminary analysis shows that about 7.8 million current customers (excluding prepaid), more than 40 million past customers, and about 850,000 prepaid customers were stolen. In total, there are 48.65 million people.
What was stolen were the names, dates of birth, social security numbers, driver's licenses and ID information of current and past customers, excluding prepaid cards. He emphasized that it does not include information such as phone numbers, account numbers, credit card numbers, PINs, and passwords. For prepaid customers, their phone numbers and PINs were stolen. T-Mobile claims to have reset the prepaid customer's PIN and notified the victim.
Regarding this issue, Vice reported on the 15th that someone was selling personal information for 100 million people on the dark Web, which was from T-Mobile.
According to Krebs on Security, a U.S. security information site, the attacker found an entry point that could access T-Mobile's two customer data centers, through which it obtained a customer database of over 100GB.
T-Mobile hasn't completed the survey yet, "continuing the forensic survey 24 hours a day," and urged customers to check the countermeasures on a special site.
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