NEC: unauthorized access to a server of its defense division

• Attacks from December 2016 on went unnoticed at entry and while they spread inside. [1]
• In June 2017, checking for a traffic pattern from a security company's threat report, NEC found infected PCs, isolated them and blocked the attacker's servers. [1]
• In July 2018, after decrypting the traffic with the outside server, NEC learned that {n:27445} files on a server shared with other divisions had been accessed. [1]

No leak has been found so far, and the files held no classified or personal information. NEC had briefed the customers concerned since July 2018. [1]