Thammasat University listed on thegentlemen ransomware leak site

• Ransomware group: thegentlemen
• Country: Thailand
• Sector: Education
• Announcement date: February 11, 2026

Thegentlemen claims data breach at Thammasat University

The ransomware group known as thegentlemen has listed Thammasat University on its leak site. The group claims to have successfully targeted the institution and asserts that they have obtained data belonging to the university. This announcement was made on February 11, 2026, marking a potential security incident for the prominent educational institution.

Ransomware groups often use leak sites to pressure victims into paying ransoms. These platforms serve as a public gallery where threat actors post names of organizations they have compromised. By listing a target, the group aims to damage the victim's reputation and create urgency. In many cases, these groups employ a strategy known as double extortion. In a double extortion scenario, attackers do not just encrypt an organization's files to disrupt operations; they also steal sensitive information before the encryption process begins. They then threaten to publish this stolen data on their public leak sites if the ransom is not met, thereby using the threat of exposure as additional leverage.

Details regarding the alleged attack

According to the announcement made by thegentlemen, the group alleges that they gained unauthorized access to the institution's networks. This access reportedly allowed them to acquire sensitive data from the university's digital environment. However, the current status of the institution's involvement in this specific leak remains unclear due to technical limitations encountered during the investigation.

When attempting to verify the claim via the group's platform, a technical verification error was encountered. This error prevented a direct assessment of the leak's validity through the provided screenshot. Furthermore, public information regarding the specific tactics, techniques, and procedures used by thegentlemen group remains limited, making it difficult to establish a comprehensive profile of the threat actor's typical operations.

Data involved in the claim

Regarding the specific content of the alleged breach, no details have been provided by the group concerning the nature or volume of the files they claim to possess. The listing names no data types.

About Thammasat University

Thammasat University is one of the oldest and most prestigious public universities in Thailand. This specific record refers to the British and American Studies programme within the university.

Potential impact and sector implications

The alleged breach carries significant implications for the university. Given that the institution operates within the education sector, there is a possibility that the leaked data could contain personal information belonging to students and staff members. Such a scenario would likely trigger legal obligations under the Thai Personal Data Protection Act (PDPA), as organizations are required to protect the privacy and integrity of personal data held within their systems.

If the claim is accurate, the exposure of such information increases the risk of individuals within the institution being targeted by identity theft or sophisticated phishing attacks. Phishing attacks often leverage stolen personal details to build trust with the victim, making the fraudulent communication appear legitimate.

If the group utilizes double extortion tactics, the university may face negative impacts regarding its operational continuity and its institutional reputation. To defend against such threats, organizations in the education sector typically focus on several defensive layers. These include robust network segmentation to prevent lateral movement by attackers, comprehensive encryption for data at rest and in transit, and continuous monitoring of network traffic to detect unauthorized access. Furthermore, regular security awareness training for students and staff is a critical component in mitigating the risk of initial access via social engineering.

As the situation evolves, the publication of any sample data by the threat actor might provide a clearer assessment of the actual scope and severity of the breach. Until such information is available, the full extent of the incident remains to be determined.