Ransomware claim against an organization in Japan (education)

Osaka Metropolitan University experienced a suspected ransomware attack that disabled its internal network, email, and administrative and academic systems, forcing cancellation of classes. The university confirmed the outage on Tuesday but no actor has been identified or claimed responsibility.

Sources

• Primary source on file. It names the organization, so it is not linked while this entry is anonymized.
• Upstream: Security news (RSS + Claude). The upstream record names the organization, so it is not linked here.
• Candidate incidents extracted from public security reporting; every entry links its article