A ransomware attack on IDC Frontier, a subsidiary of SoftBank, commenced on October 7, 2026. The attack has affected nearly 500 companies and local governments across Japan, disrupting various sectors such as logistics, education, and financial services.
The attackers claimed to have encrypted 3.6 petabytes of data within seven minutes. Additionally, they reported deleting 554,150 snapshots and removing 41.5 petabytes of backup capacity, significantly impacting IDC Frontier's operations.
As a result of the attack, IDC Frontier's customer management console remains offline, necessitating manual restoration of virtual servers. The attackers left a message taunting the speed of their operation, highlighting the rapid execution of their attack.
The incident is part of a broader trend of ransomware targeting virtualization infrastructure.