IDC Frontier, a SoftBank Group subsidiary, says a ransomware attack that began at 3:40 a.m. on October 7 stopped virtual servers in four zones of its IDCF Cloud East Japan Region 1. It says 495 companies and local governments are affected. In its third update, the company says customer data stored in those zones is unlikely to be recoverable, so customers will have to restore from their own backups; it is advising customers in other regions to back up their data too. The attacker claims to have encrypted 225 databases and wiped more than 550,000 snapshots, BleepingComputer reports; those figures are the attacker's.