ULose ransomware group lists www.newyjh.com on its leak site

• Ransomware group: ULose
• Country: South Korea
• Announcement date: September 30, 2026

ULose claims to have stolen data from NewYJH

The threat group known as ULose has officially announced the listing of the entity operating under the domain www.newyjh.com on its dedicated leak site. This announcement, published on September 30, 2026, marks a new incident involving the group's targeting of organizations for extortion purposes.

In the context of modern cybercrime, ransomware groups often employ a tactic known as double extortion. In these scenarios, attackers do not merely encrypt an organization's systems to disrupt operations; they also exfiltrate sensitive information before deploying the encryption. The threat actors then use the threat of leaking this stolen data on public or semi-public leak sites to pressure the victim into paying a ransom. This method increases the leverage held by the attackers, as the victim faces not only operational downtime but also significant reputational damage and legal consequences resulting from the exposure of private information.

The listing by ULose indicates that the organization is based in South Korea. According to the group's claim, the data belonging to the entity is currently being offered for sale on their platform.

Details regarding the claimed data breach

While the group has made a public claim regarding the breach, specific details concerning the stolen information remain limited. As of the current assessment, the group has not provided any screenshots or detailed information regarding the nature of the allegedly leaked data. Furthermore, the announcement does not specify the total volume of the data or the exact number of files involved in the incident.

The listing names no specific data types as being part of the breach.

About NewYJH

NewYJH is an education and consulting institution based in South Korea. The organization primarily provides academic guidance and educational services to students, serving as a resource for academic development and professional consulting within the region.

Assessment and potential risks

This incident may indicate potential vulnerabilities in the entity's data security processes. Because the content of the leaked data remains unclear, the risk of exposure for personal information or trade secrets cannot be assessed at this time. However, the potential consequences of such a breach are significant for organizations in the education and consulting sector.

The entity may face legal obligations under South Korea's Personal Information Protection Act (PIPA) due to the alleged exposure of sensitive information. Beyond legal ramifications, the offering of data for sale on a leak site could create secondary risks for the entity's customers and employees. These risks include identity theft and the possibility of targeted phishing attacks, where attackers use stolen information to craft highly convincing fraudulent communications.

To defend against such threats, organizations typically implement a multi-layered security approach. This includes maintaining robust backup solutions that are isolated from the primary network, implementing strict access controls to limit data exposure, and conducting regular security audits to identify vulnerabilities. Furthermore, continuous monitoring and employee training are essential components in mitigating the impact of social engineering and unauthorized data exfiltration. Information regarding the ULose group remains limited in the public domain, making it difficult to determine their specific tactics, techniques, and procedures.