Lynx ransomware group lists runtec.co.jp on its leak site

• Ransomware group: Lynx
• Country: Japan
• Sector: Technology
• Announcement date: May 2, 2025

The Japanese logistics company Runtec Co., Ltd. has been listed on the leak site of the Lynx ransomware group. The threat actor group has published an announcement claiming that they have successfully compromised data belonging to the organization.

The claimed attack and event details

On May 2, 2025, the threat actor known as Lynx published an announcement on their dedicated leak site. In this post, the group alleges that they have gained unauthorized access to the systems of runtec.co.jp. According to the claims made by the group, they are in possession of approximately 500 GB of data belonging to the company.

The announcement posted by the group on their leak site also includes general information regarding the operations of the company. This type of activity is common among ransomware groups that utilize leak sites to increase pressure on their targets. These sites serve as a public platform where threat actors post information about their victims, often including company profiles to validate their claims and increase the visibility of the incident.

Data involvement and specifics

Regarding the specific nature of the information allegedly stolen, the current records provide limited details. The listing names no specific data types or categories of information that have been compromised. While the group claims a significant volume of data, the content of the files remains unknown as there is no detailed information regarding the specific types of data allegedly compromised in the provided records or the screenshot.

Organization profile

Runtec Co., Ltd. is a prominent logistics company based in Japan. Founded in 1953, the company is a member of the SENKO Group. The organization specializes in the temperature-controlled transportation and storage of food products throughout the Japanese market. To maintain its operations, Runtec Co., Ltd. utilizes digital solutions and eco-friendly technologies designed to enhance the efficiency and safety of its logistics services.

Impact assessment and industry implications

The claim made by the Lynx group could potentially create a negative impact on the operational continuity of Runtec Co., Ltd. The Lynx group is a relatively recent emergence, having appeared in 2024. Technical observations have noted that the group exhibits code similarities with the INC Ransom group. This connection suggests that Lynx may employ double-extortion tactics, a method where attackers not only encrypt an organization's data but also threaten to publish sensitive information on a public leak site to coerce the victim into paying a ransom.

For organizations operating within the logistics and technology sectors, such incidents carry significant risks. Under Japanese data protection regulations, a potential data breach of this nature could trigger specific legal obligations for the organization involved. Furthermore, depending on the actual nature of the leaked data, there is a significant risk that employees or business partners could be exposed to identity theft and targeted phishing attacks.

To mitigate the risks associated with such threats, organizations typically focus on robust defensive postures. This includes implementing strong access controls, maintaining regular offline backups, and ensuring continuous monitoring of network traffic to detect unauthorized movements. In the event of a claimed breach, organizations must navigate complex legal landscapes regarding data protection and public disclosure requirements to manage the potential impact on stakeholders and operational integrity.