Loyola College listed on Interlock ransomware leak site

• Ransomware group: Interlock
• Country: Australia
• Sector: Education
• Announcement date: August 29, 2025

Interlock claims data breach at Loyola College

The Interlock ransomware group has listed data allegedly belonging to Loyola College on its leak site. According to an announcement published by the group on August 29, 2025, the threat actor claims to have compromised the institution's systems. The group alleged that the security measures in place at the organization were insufficient to prevent the unauthorized access.

The incident, which the group claims occurred on August 29, 2025, involves a significant volume of information. While the group has not specified a ransom demand, they have indicated that they have access to various sensitive files. Publicly available information regarding the specific operations and identity of the Interlock group remains limited.

Details of the alleged data theft

Based on the information provided by the attackers, the breach involves a substantial amount of data. The group claims that approximately 620 GB of data is available for download. Screenshots provided by the group suggest that the stolen information is organized into various directories, including folders named DBbackup, humanresource, and share.

The content of the alleged leak includes several categories of sensitive information. The data claimed to be stolen includes:

• Student records
• Employee HR data
• Financial documents
• Legal documents

The presence of database backups and human resources records suggests a deep level of access to the organization's internal administrative systems and office documents.

About Loyola College

Loyola College is a Catholic secondary school located in Victoria, Australia. The institution provides education for students ranging from years 7 to 12.

Potential risks and organizational implications

The alleged compromise of such a vast amount of data may pose significant secondary risks to the individuals involved. For students and employees within the institution, the exposure of personal information could lead to threats such as identity theft and targeted phishing attacks. These types of attacks often leverage stolen personal details to gain further access to accounts or to conduct financial fraud.

As an educational institution operating within Australia, the organization may be expected to fulfill its data protection obligations under the Privacy Act 1988. The sensitivity of the alleged data, which includes legal and financial documents, could lead to reputational damage and potential legal sanctions for the institution. Furthermore, the disclosure of these documents may negatively impact the institution's operational processes.

In such scenarios, ransomware groups often employ a strategy known as double extortion. In this model, attackers not only encrypt an organization's data to disrupt operations but also steal sensitive information to use as leverage. The threat of publicly releasing the data serves as a method to pressure the victim into paying a ransom. If a ransom is not met, the group may proceed with the public disclosure of the stolen files.

To defend against such threats, organizations typically implement various security measures. These include robust backup strategies, multi-factor authentication, and continuous monitoring of network traffic to detect unauthorized access. For educational institutions, protecting student and employee data is a critical component of maintaining institutional integrity and compliance with national privacy regulations.