Dartmouth.edu listed on Clop ransomware leak site

• Ransomware group: Clop
• Country: United States
• Sector: Education
• Announcement date: November 13, 2025

The Clop ransomware group has claimed to have published data belonging to Dartmouth.edu on its dedicated leak site. This announcement, made on November 13, 2025, marks a new instance of the threat actor targeting a prominent academic institution.

The claims made by Clop

The threat actor known as Clop has listed Dartmouth.edu on its leak site, claiming to have compromised data belonging to the institution. In the announcement, the group has published a warning message alleging that the institution neglected its security measures. To facilitate the distribution of the alleged stolen information, the group has provided a torrent link for downloading the data within the announcement.

Ransomware leak sites serve as a platform for cybercriminals to exert pressure on their victims. These sites are used to host stolen data and issue public ultimatums to organizations. When a group uses a leak site in this manner, they are often employing double extortion tactics. This method involves not only encrypting an organization's systems to disrupt operations but also stealing sensitive information to threaten its public release if a ransom is not paid. This approach significantly increases the pressure on the victim, as the threat of a data leak can lead to severe reputational and legal consequences.

Details regarding the leaked data

There is no detailed information regarding the content of the leaked data. The provided screenshot in the announcement displays the institution's contact and general information, but specific datasets have not been identified. The listing names no specific data types.

In many ransomware incidents, the specific nature of the stolen data remains unknown until the threat actor releases it or the victim confirms the scope of the breach. The lack of immediate detail regarding the file count or the total size of the data makes it difficult to assess the full scale of the potential exposure at this stage.

About Dartmouth College

Dartmouth College is a private Ivy League research university located in Hanover, New Hampshire, United States. It provides education and conducts research across a wide range of academic disciplines at the undergraduate, graduate, and professional levels.

Assessment and implications for the sector

Given the Clop group's history of exploiting file transfer software vulnerabilities, it is possible that this incident may have resulted in a significant data breach. As an educational institution, the exposure of student and staff records could create risks for identity theft and targeted phishing attacks. The sensitive nature of academic and personal records held by universities makes them attractive targets for various types of cybercrime.

Since the institution is based in the US, the incident may have legal implications under state laws and federal regulations. Organizations in the education sector must navigate complex regulatory frameworks to protect the privacy of their students and employees. The group's use of double extortion tactics may be intended to exert pressure on the institution and could increase the risk of secondary data leaks.

To mitigate such risks, organizations in the education sector can implement several defensive measures. These include maintaining rigorous patch management to address vulnerabilities in software, such as file transfer protocols, and enforcing multi-factor authentication across all systems. Additionally, robust data encryption and regular security audits can help protect sensitive information and identify potential weaknesses before they can be exploited by threat actors.