> JapanHacked_
[Contained][Severity: Moderate][Ransomware]

Sunrise: ransomware encrypted data on the file server of this subsidiary of supermarket chain Okuwa

Ransomware encrypted the file server of Sunrise, a produce wholesaler and consolidated subsidiary of Okuwa. No information leak has been confirmed.

Disclosed

2025-08-16

Organizations involved

1

Leaked or at risk

Unknown

Downtime

Unknown

What happened

  1. It confirmed that data on Sunrise's file server had been encrypted by ransomware. [1] [2]

  2. Okuwa announced it. With outside experts it worked on the cause and recovery, and consulted the police and other authorities. [1] [2] [3]

Impact

No information leak has been confirmed. Sunrise's file server was built and run separately from those of other Okuwa group firms, and no effect on other group companies has been confirmed. [1] [2]

Timeline

  1. Started, Detected 2025-08-14
  2. Disclosed 2025-08-16
  3. 2 days

Attack or cause

Method
[Ransomware]
Impact
Entry point
Unknown

Data exposed or at risk

–

Organizations involved

Open in organization search

Sources

  1. [1][Official]連結子会社におけるランサムウェア被害の発生についてOkuwa Co., Ltd. · 2025-08-16
  2. [2][News]ファイルサーバがランサム被害、データが暗号化 - 青果流通会社Security NEXT · 2025-08-18
  3. [3][News]オークワ 連結子会社の株式会社サンライズにランサムウェア攻撃ScanNetSecurity · 2025-08-26 08:05