BlackLocks ransomware group lists 광명산업(주) on its leak site

• Ransomware group: BlackLocks
• Country: South Korea
• Sector: Manufacturing
• Announcement date: September 5, 2026

BlackLocks claims data exfiltration from Kwangmyung Industry

The threat actor known as BlackLocks has listed the South Korean manufacturing company Kwangmyung Industry on its dedicated leak site. According to the announcement made by the group, the organization has been targeted in a cyberattack, resulting in a significant breach of data. The group claims to have successfully exfiltrated a massive volume of information from the company's networks.

This incident follows a pattern common in modern ransomware operations, often referred to as double extortion. In such scenarios, threat actors do not merely encrypt an organization's systems to disrupt operations; they also steal sensitive data to use as leverage. By threatening to release this stolen information on public leak sites, attackers aim to pressure the victim into paying a ransom to prevent the exposure of proprietary or sensitive information.

Details of the alleged breach

The BlackLocks group has made several specific claims regarding the scope of the attack. The group alleges that they have obtained 6TB of data from the networks belonging to Kwangmyung Industry. To support these claims and demonstrate the validity of the breach, the threat actor has shared several document samples with the public. These samples are stated to belong to the internal operations of the company.

While the volume of data is stated to be substantial, the group has not provided detailed information regarding the full scope of the leaked data. Based on the screenshots shared in the announcement, the information appears to include various internal business documents. The content of these screenshots includes tables and charts that appear to relate to the following areas:

• Production data
• Technical documents
• Operational tables

The specific nature of the files remains partially obscured, as the group has not released a complete inventory of the stolen files. However, the presence of charts and tables suggests that the breach may involve sensitive internal documentation used to manage the company's daily activities and manufacturing standards.

About Kwangmyung Industry

Kwangmyung Industry is a manufacturing company based in South Korea. Established in 1985, the organization specializes in the production of automotive parts. Their product portfolio includes critical components such as automotive seats, molds, and jigs. The company maintains a significant operational footprint, managing various domestic facilities within South Korea and operating international subsidiaries located in the USA and Mexico.

Potential impact and security considerations

This incident may have negative impacts on the organization's intellectual property and trade secrets. The inclusion of production process data in the leak could potentially weaken the company's competitive advantage and pose risks to supply chain security. When technical processes and production tables are exposed, it can provide competitors or other malicious actors with insights into the company's unique manufacturing methods.

Furthermore, the organization may face legal challenges depending on the contents of the stolen data. Under South Korea's Personal Information Protection Act (PIPA), the organization may face legal sanctions if the leaked data includes employee or customer information. The exposure of such information can lead to significant regulatory scrutiny and loss of trust among stakeholders.

Public information about the BlackLocks group is limited; therefore, the group's motivations and future actions remain uncertain. For organizations operating in the manufacturing sector, such incidents highlight the necessity of robust network security. It is advisable for organizations to review their network security against secondary attack risks and to notify relevant stakeholders. Maintaining rigorous access controls and monitoring for unauthorized data exfiltration are common defensive steps used to mitigate the impact of such threats.