IDCF Cloud: Ransomware Disrupts Four Eastern Japan Zones; Customers Advised to Rebuild from Backups
1. Basic Information Report Title : [Third Report] Service Disruption Caused by Unauthorized Access to Part of Our Systems Source : IDC Frontier Date : 2026-10-08 Original Source : IDC Frontier Related Sources : Second Report , BleepingComputer Related Malware & Threat Groups : Unspecified ransomware Related CVE : None specified Related Products : IDCF Cloud Severity : Critical 2. Executive…
On October 7, 2026, a ransomware attack targeted IDCF Cloud's Eastern Japan Region 1, causing service disruptions across four zones and rendering virtual servers unbootable. The incident affected 495 corporate and municipal clients.
The attacker first gained unauthorized access to parts of the cloud infrastructure, though the specific initial access points and privileges remain undisclosed. Once inside, they deployed ransomware that stopped virtual servers and prevented them from being rebooted. In response, IDCF Cloud isolated the affected network and halted management consoles to prevent further damage.
To contain the attack, the provider advised affected customers to rebuild their systems in a separate environment and restore their data from their own backups. Users experienced web and business service outages, while administrators observed stopped management consoles and virtual machine halts. The long-term impact included difficulty in retrieving and restoring data within the targeted zones, requiring customers to rebuild from their own backups.
The provider is currently investigating the incident and conducting a thorough analysis to determine the extent of the attack and any potential data theft. They have provided initial information to affected customers, but further details are expected as the investigation progresses.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
