Narumi (Thailand) Co.,Ltd. Listed by thegentlemen Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

Narumi (Thailand) Co.,Ltd., a manufacturer of plastic automotive components based in Rayong, Thailand, has been listed by the ransomware group known as thegentlemen. The listing was reported on August 19, 2025. Public information indicates that internal files were claimed to have been exfiltrated in a ransomware attack, though the number of people affected remains unknown and further details about the incident have not been disclosed.

This report examines what is currently known about the listing, the group making the claim, the company involved, and the practical implications for anyone whose information may have been exposed. Exact confirmation of the breach and its full scope has not been independently verified in the available record.

Inside the incident

According to the available facts, Narumi (Thailand) Co.,Ltd. was listed by thegentlemen ransomware group on or around August 19, 2025. The group claims that internal files were exfiltrated as part of a ransomware attack. No public details have been released regarding the precise date of the intrusion, the method of initial access, the volume of data taken, or whether systems were encrypted. The number of individuals whose personal or professional information may have been involved is listed as unknown. Beyond the claim of internal file exfiltration, the contents, scale, and confirmation status of any data release remain undisclosed in the public record.

Ransomware incidents of this type typically involve unauthorized access followed by data theft and a threat to publish or sell the material if demands are not met. In this case, the only concrete assertion available is the group's listing itself and the statement that internal files were taken. No further technical indicators, ransom demands, or victim statements appear in the provided facts.

The group behind it: thegentlemen

thegentlemen is a ransomware operation that has appeared in public reporting as a group that conducts double-extortion attacks: encrypting systems while also stealing data and threatening to leak it. Like many such actors, the group maintains a leak site where it posts the names of organizations it claims to have compromised, often accompanied by samples or full archives of stolen material if negotiations fail. Public knowledge of thegentlemen indicates a pattern of targeting mid-sized industrial and manufacturing firms, though specific victim selection criteria are not always transparent.

In the present case, the listing of Narumi (Thailand) Co.,Ltd. should be treated as an unverified claim by the group. No independent confirmation of successful intrusion, data volume, or publication of files is contained in the facts. Established public descriptions of thegentlemen note that the group has previously used standard ransomware tooling and data-exfiltration techniques common to contemporary operators, but no unique claims or statements about this particular victim beyond the listing itself are recorded here.

Who is Narumi (Thailand) Co.,Ltd.?

Narumi (Thailand) Co.,Ltd. is a subsidiary of Narumi Goukin Manufacturing Co., Ltd. of Japan. It was established in June 2010 and operates from the WHA Eastern Seaboard Industrial Estate in Rayong, Thailand. The company specializes in the manufacture of plastic automotive components, including door handles, tailgate handles, and roof rails. Its primary customers include major automotive manufacturers such as Mitsubishi Motors (Thailand), Honda Automobile (Thailand), and Hitachi Chemical Automotive Products (Thailand).

With approximately 130 employees, the firm holds ISO/TS 16949 and ISO 14001 certifications, reflecting quality and environmental management standards common in the automotive supply chain. As a mid-sized industrial manufacturer embedded in just-in-time automotive production, Narumi (Thailand) typically maintains design drawings, production schedules, supplier contracts, employee records, and quality-control documentation. A disruption or data exposure at such a supplier can affect both the company itself and the larger manufacturers that rely on its components.

What was likely exposed

The facts state that internal files were exfiltrated in a ransomware attack. No further breakdown of data types—such as employee personal information, customer contracts, financial records, or technical drawings—has been disclosed. Organizations of this kind commonly hold personnel files, payroll data, engineering specifications, supplier agreements, and operational emails. Because the exact contents remain unconfirmed, it is not possible to state with certainty which categories of information were taken or whether any personal data of employees or partners was included.

Public detail is limited to the claim of internal-file exfiltration. Readers should treat any more specific assertions about the nature of the stolen material as unverified until additional evidence appears.

Why it matters

For individuals whose information may have been among the internal files, the primary risks include potential identity misuse, phishing attempts that leverage stolen personal details, or exposure of employment-related data. Even when personal identifiers are not the main target, internal documents can contain enough context for social-engineering attacks. For the company, the incident raises concerns about operational continuity, contractual obligations to automotive clients, and the possible need to notify regulators or partners under applicable data-protection rules.

Because Narumi (Thailand) sits in a multi-tier supply chain, any compromise of production or quality data could have secondary effects on vehicle manufacturers that depend on its components. The absence of confirmed numbers of affected people or published file inventories means the full impact cannot yet be quantified, but the listing itself signals that sensitive material may now be outside the organization's control.

If your data was in this claimed breach

If you are a current or former employee, contractor, or business partner of Narumi (Thailand) Co.,Ltd., monitor financial accounts and credit reports for unusual activity and be alert to unsolicited communications that reference the company or your role there. Change passwords on any accounts that may have shared credentials with work systems, and enable multi-factor authentication where available. Consider placing fraud alerts with credit bureaus if you believe personal identifiers were involved.

Readers can also run a free exposure scan of their email address to check whether that address has already appeared in known breach data sets. Such scans do not confirm involvement in this specific incident but can indicate whether an address has surfaced elsewhere. Remain cautious of any messages claiming to offer remediation services or demanding payment related to the listing; legitimate assistance does not require upfront fees of that kind.

AICompiled with AI assistance from public sources and published under our editorial standards.