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Incident

Castle School Education Trust

Incident posture

Attack window
Mar 2021
Location
United Kingdom
Status
Historical
CIA posture
Available to members
Updated
2026-07-15 02:03

Linked entities

Victim
Castle School Education Trust
Threat actors
0 actors
Sources
1 source

Timeline

Occurred
Mar 2021
Discovered
Pending
Disclosed
Pending
Resolved
Pending

Summary

A ransomware attack targeted multiple schools within the Castle School Education Trust in South Gloucestershire, disrupting operations by rendering IT systems inaccessible. The incident impacted all institutions under the trust, including named entities such as Castle School and Marlwood School, though specific details regarding data compromise or ransom demands were not disclosed in available reporting. The attack necessitated operational adjustments due to the loss of critical technological resources.

Motives

Detailed motive labels are available to members.

1 motive

TTPs

Detailed technique labels are available to members.

1 technique

Description

On or around March 15, 2021, multiple schools within South Gloucestershire’s Castle School Education Trust experienced a disruptive ransomware attack targeting their IT infrastructure. The incident affected all educational institutions under the trust’s management, including Castle School and Marlwood School, though specific technical details about the intrusion vector or ransomware variant were not publicly disclosed. Attackers successfully encrypted systems, rendering critical IT resources inaccessible and forcing operational disruptions across administrative and educational functions. The attack’s timing during the academic year compounded its impact, hindering routine activities reliant on digital platforms. No explicit ransom demands or communication from threat actors were referenced in initial reports, leaving the attackers’ identity and motives unconfirmed.

The immediate consequence was a widespread loss of access to IT systems, disrupting school operations without evidence of data exfiltration or student safety compromises. Trust representatives acknowledged the incident publicly by March 17, 2021, confirming the attack’s targeted nature but omitting specifics about mitigation steps or forensic investigations. Recovery efforts focused on restoring system functionality, though timelines and success rates remained undocumented in available sources. The incident highlighted vulnerabilities within the trust’s infrastructure but did not trigger broader reports of similar attacks against neighboring districts. No long-term financial, legal, or reputational repercussions were detailed in the aftermath, leaving the full scope of operational and educational impacts unquantified.

Sources

Sources available to members: 1 source.

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