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[Investigating][Severity: Moderate][DDoS]

Hiroshima Prefecture: the cloud hosting the websites of the prefecture and 23 municipalities was hit by DDoS attacks and became hard to access

The cloud serving as the connection point for the websites of the prefecture and all 23 municipalities was under DDoS attacks for more than two days. No leak is confirmed.

Disclosed

2022-02-18

Organizations involved

1

Leaked or at risk

Unknown

Downtime

Unknown

What happened

  1. In the morning the cloud management vendor confirmed the first attack. Attacks then repeated every 30 to 60 minutes. [1] [2]

  2. The prefecture announced the case and consulted the prefectural police. [1] [2]

Impact

It appears to be a DDoS attack that overloads servers with large amounts of data, and when attacks coincided with visits the websites of the prefecture and the municipalities were hard to open. The cloud is not connected to servers handling confidential information, and no leak is confirmed. As of the 18th there had been no demand for money to stop the attacks. [1] [2]

Timeline

  1. Started, Detected 2022-02-16
  2. Disclosed 2022-02-18
  3. 2 days

Attack or cause

Method
[DDoS]
Impact
[Service outage]
Entry point
Unknown

Data exposed or at risk

–

Organizations involved

Open in organization search

Sources

  1. [1][News]広島県と23市町のクラウドにサイバー攻撃　ホームページ開きにくくThe Asahi Shimbun · 2022-02-18
  2. [2][News]広島県にサイバー攻撃　丸２日以上、ＨＰ閲覧に支障The Sankei Shimbun · 2022-02-18