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idcf-ransomware-2026 · Disclosed 2026-10-07

IDCF Cloud: ransomware outage and data-recovery impact

An October 7 ransomware outage affected 495 organizations. The provider expected recovery in affected zones to depend on customers’ own backups; entry remained under investigation.

Cause unresolved / undisclosed

Outcome: Confirmed breach

Entry path and evidence

  • Reported fact

    The provider confirmed ransomware by a third party; the entry path remains under investigation.

    [s2][s3]第2報 ■原因 / 第3報 ■原因
  • Reported fact

    Virtual-server outages and restart failures affected 495 organizations in part of East Japan Region 1.

    [s3]■対象 / ■発生事象 / ■影響範囲
  • Reported fact

    Recovery in tesla, henry, pascal and joule zones was expected to require customers’ own backups.

    [s3]■現在の調査状況

Timeline

  1. Outage began around 03:40 JST; initial and second notices published. [s1] [s2]

  2. Published affected zones and recovery outlook. [s3]

  3. Published incident-response and recovery organization. [s4]

Reported response

  • Reported fact

    Isolated networks and consoles, engaged specialists and provided backup and migration guidance.

    [s3][s4]第3報 ■現時点の対応状況 / 第4報 ＜お客さま対応について＞

Cause and mitigation hypotheses

Not assessed. Editorial hypotheses have not been added for this incident; this does not establish safety or a confirmed cause.

Evidence relevant to prevention

Insufficient evidence

Entry and prior privilege controls are unknown; inspect lateral-access limits and recovery evidence for backups independent of affected infrastructure.

Editorial assessment; not a determination of liability. [s3]

Unknowns and AI involvement

AI involvementUnknown

The reviewed primary sources do not establish attacker use of AI.

495 counts organizations, not leaked people. Extraction scope, CVE and recovery completion remain unresolved; other-console suspension was precautionary.

Sources

  1. [s1] IDCフロンティア · Primary source

    当社サービスの一部システムに対する不正アクセスについて ↗

    Published 2026-10-07 · Reviewed 2026-10-12

  2. [s2] IDCフロンティア · Primary source

    【第2報】当社サービスの一部システムに対する不正アクセスについて ↗

    Published 2026-10-07 · Reviewed 2026-10-12

  3. [s3] IDCフロンティア · Primary source

    【第3報】当社サービスの一部システムへの不正アクセスによる障害について ↗

    Published 2026-10-08 · Reviewed 2026-10-12

  4. [s4] IDCフロンティア · Primary source

    【第4報】不正アクセスによる障害への対応体制について ↗

    Published 2026-10-09 · Reviewed 2026-10-12