Hanjin Information Systems & Telecommunication Co., Ltd. listed by N0n ransomware group

• Ransomware group: N0n
• Country: South Korea
• Sector: Technology
• Announcement date: October 21, 2026

The Hanjin Information Systems & Telecommunication Co., Ltd. has been listed on the leak site of the N0n ransomware group. The threat actor known as N0n claims to have access to data allegedly belonging to the South Korean technology firm and has threatened to expose this information if their demands are not met. Currently, public information regarding the specific methods and identity of this threat group remains limited.

The alleged data breach and claims by N0n

The threat actor known as N0n has listed data allegedly belonging to Hanjin Information Systems & Telecommunication Co., Ltd. on its leak site. According to the group's claims, the data will be exposed to the public if their ransom demands are not met. While the specific ransom demand has not been disclosed, the group's threat of exposure follows a pattern common in double extortion ransomware attacks. In such scenarios, attackers not only encrypt an organization's systems but also steal sensitive data to use as leverage, threatening to leak it to pressure the victim into paying.

The contents of the alleged leak are described as being quite extensive, potentially including a complete corporate identity directory. This information is said to include 999 personnel accounts, which contain specific names and corporate email addresses. Furthermore, the breach is claimed to involve client staffing structures and details regarding third-party vendor accounts along with their associated corporate domains.

Affected data types

• Employee contact information
• Corporate identity data
• Third-party vendor account details

Organization profile

Hanjin Information Systems & Telecommunication (HIST) is a technology company operating under the Hanjin Group. The company provides critical IT infrastructure, system integration, and telecommunication services to various group companies.

Impact assessment and security implications

The exposure of the allegedly leaked data carries significant risks for the organization. The information contained in the leak could be utilized to conduct highly targeted phishing attacks against the organization's employees and its business partners. By having access to names, email addresses, and staffing structures, attackers can craft convincing social engineering campaigns that appear legitimate to internal staff and external vendors.

Furthermore, the exposure of staffing structures may negatively impact the organization's client relationships and compromise the security of its supply chain. The leakage of third-party vendor information is particularly concerning as it may increase the risk of secondary attacks, where attackers use the information gathered from one breach to pivot into the systems of partner organizations. Such incidents often lead to significant reputational damage for the affected entity.

From a regulatory perspective, the organization could potentially face legal sanctions under South Korea's Personal Information Protection Act (PIPA) due to the exposure of sensitive information. Additionally, the tendency of threat actors like N0n to publish such data can create intense pressure on an organization's operational continuity, as they use the threat of public disclosure to disrupt business functions and force a response.

In general, organizations in the technology and infrastructure sectors can mitigate these risks by implementing robust identity and access management (IAM) protocols, conducting regular security awareness training to defend against phishing, and ensuring strict third-party risk management programs are in place. Maintaining comprehensive logging and monitoring can also help in detecting unauthorized access to sensitive directories before large-scale data exfiltration occurs.