Nathalin Group Listed by thegentlemen Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

On February 25, 2026, the Nathalin Group appeared on a listing associated with the ransomware group thegentlemen. The entry states that internal files were exfiltrated during a ransomware attack. No information has been released on the number of individuals affected or the specific volume of data involved. This development draws attention to data-handling practices at companies that manage maritime logistics for petroleum and chemical products.

Inside the incident

The only confirmed detail is the listing itself and the statement that internal files were taken. No public record specifies the date of the intrusion, the encryption or exfiltration methods used, or whether any ransom demand was issued or met. The scale of the operation and the current status of any data remain undisclosed.

The group behind it: thegentlemen

Thegentlemen is a ransomware operator that maintains a leak site where it lists organizations it claims to have targeted. The group typically conducts encryption attacks followed by data exfiltration and then posts victim names to pressure negotiations. Its listings function as public claims rather than independently verified incidents. Prior activity attributed to the group has followed this pattern across multiple sectors.

Who is Nathalin Group?

Nathalin Group was established on 21 July 1987, originally as Buawaree Company Limited, and later renamed Nathalin Co., Ltd. It operates as an independent tanker company focused on petroleum and chemical transport in Thailand. Its services include logistics and storage, international maritime operations, floating storage, and trading. The company states that it maintains ISM Code certification for crew and vessel operations.

What was likely exposed

The listing refers only to internal files exfiltrated in a ransomware attack. No further breakdown of file categories or record counts has been provided. The exact contents therefore remain unconfirmed.

• Internal operational documents
• Records held by a maritime logistics provider

What's at stake

Individuals whose information appears in the exfiltrated files could see their details circulated without their knowledge. For the company, exposure of internal records may affect contractual relationships, regulatory compliance, and day-to-day maritime operations that rely on controlled data flows. No assessment of long-term consequences can be made until the scope of the data is clarified.

What to do if you're exposed

Individuals who believe their information may be involved should first verify whether their email address appears in public breach repositories. They can then change passwords for any accounts linked to the organization and enable multi-factor authentication where available. Monitoring financial and identity-related accounts for unusual activity provides an additional layer of protection. Organizations in similar sectors routinely advise staff to treat any unexpected requests for verification as potential follow-on risks.

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