Fortune 500 company NTT discloses security breach

guest · May 28, 2020

Fortune 500 company NTT discloses security breach
Japanese telecommunications giant NTT says hackers breached its internal network and stole data on 621 customers
May 28, 2020
https://www.zdnet.com/article/fortune-500-company-ntt-discloses-security-breach/

Nippon Telegraph & Telephone (NTT), the 64th biggest company in the world, according to the Fortune 500 list, has disclosed today a security breach.

NTT says hackers gained access to its internal network and stole information on 621 customers from its communications subsidiary, NTT Communications, the largest telecommunications company in Japan, and one of the biggest worldwide.
The hack took place on May 7, and NTT says it became of the intrusion four days later, on May 11.
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The company says hackers breached several layers of its IT infrastructure and reached an internal Active Directory (AD in the graph below) to steal and upload data to a remote server.

The company is still investigating the breach, which it made public today, but says it plans to notify all customers "when it becomes clear what should be notified."
NTT said it's also in the process of upgrading its IT infrastructure.
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