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Incident

宮城学院女子大学

Incident posture

Attack window
May 2025
Location
Japan
Status
Unknown
CIA posture
Available to members
Updated
2026-09-02 10:59

Linked entities

Victim
宮城学院女子大学
Threat actors
0 actors
Sources
1 source

Timeline

Occurred
May 2025
Discovered
Pending
Disclosed
Pending
Resolved
Pending

Summary

The institution experienced a cybersecurity incident in which unauthorized access to its network was detected, prompting the university to take the affected systems offline as a precautionary measure. The incident disrupted access to certain systems, including the student portal, and restricted the use of Google services and email for some users. In response, the university established a temporary network environment to support essential educational and research activities while working on recovery efforts. Notifications regarding the impact on specific departments dependent on the affected systems were provided, and an investigation was initiated to assess the full scope of the incident. The university has been communicating updates to students and staff through its official channels as recovery work progresses.

Motives

Detailed motive labels are available to members.

0 motives

TTPs

Detailed technique labels are available to members.

1 technique

Description

On May 12, 2025, Miyagi Gakuin Women's University (宮城学院女子大学) issued a public notice through its official news channel reporting a network disruption caused by a ransomware infection. The institution stated that it had confirmed the infection and that this had resulted in the unavailability of certain network services. The university expressed its regret for the inconvenience and concern caused to students, faculty, and other affected parties, and presented the matter as an ongoing incident being managed by the organization's response team. The publication of the notice on the university's news portal served as the primary formal communication channel acknowledging the security event to the broader community.

According to the disclosure, the ransomware infection had a direct effect on internal systems and services used by the university community. The notice indicated that, as a consequence of the infection, use of the campus email system had been suspended or restricted, effectively cutting off a core communication channel relied upon for academic and administrative operations. In addition, the university's network connectivity was reported to be unstable, and restoration of the network environment was described as requiring an extended period of time. The institution signaled that it was engaged in recovery work but did not provide a specific timeline for the full restoration of services. The disruption extended beyond email to affect the availability of departmental file servers, which were described as being in a state dependent on the status of the broader system recovery effort.

In response to the incident, the university indicated that it was taking several operational measures to address the situation and limit further disruption. The notice stated that the introduction of a new internal system was postponed in order to prioritize incident response and recovery activities, and that any planned deployment that had not yet been initiated would not be carried out until the situation stabilized. This decision reflected an effort to concentrate resources on remediation rather than on new system rollouts. The university also announced that it would provide updates on the status of its operations through posted notices on its official channels, and asked that inquiries and communications from affected parties be directed through these public notices rather than through the temporarily unavailable email infrastructure. The message concluded with an apology to those affected and an indication that further information would be communicated as the response progressed.

Sources

Sources available to members: 1 source.

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