tmbs.ch Listed by lockbit3 Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

When a logistics firm that moves freight across borders appears on a ransomware group's leak site, the people most immediately at risk are not only the company's own staff but also customers, partners and drivers whose names, contracts or shipment details may sit inside internal systems. Public reporting so far does not say how many individuals are involved or exactly which records left the network, yet the mere claim that internal files were taken is enough to raise practical concerns about identity misuse, invoice fraud and disruption to supply chains that ordinary people rely on every day.

On 21 March 2024 the organisation behind tmbs.ch was listed by the LockBit3 ransomware group. The listing asserts that internal files were exfiltrated during a ransomware attack. No independent confirmation of the full scope has been published, and the number of people affected remains unknown. What follows is a careful account of what is known, what is claimed, and what those potentially affected can usefully do next.

What happened

According to publicly available breach records, tmbs.ch was listed by the LockBit3 ransomware group on 21 March 2024. The group claims that internal files were exfiltrated as part of a ransomware attack. Beyond that assertion, key details remain undisclosed: the precise date the intrusion began, how the attackers gained access, the volume of data taken, and whether any ransom demand was paid or files were later released. No official statement from the organisation confirming or denying the full extent of the incident has been incorporated into the available facts. The only concrete description of the exposed material is the phrase “internal files exfiltrated in ransomware attack.”

Who is lockbit3?

LockBit3 is the name used by a well-documented ransomware operation that has been active for several years. The group typically operates a ransomware-as-a-service model, providing tools and infrastructure to affiliates who then target organisations. Its hallmark tactic is double extortion: encrypting systems while simultaneously copying data and threatening to publish it on a dedicated leak site if payment is not made. LockBit has previously claimed responsibility for attacks across many sectors, including manufacturing, professional services and logistics. Listings on its leak site are claims made by the group itself; they do not automatically prove that every asserted detail is accurate or that the victim has verified the intrusion. In this case the facts record only that tmbs.ch was listed and that the group claims internal files were taken.

About tmbs.ch

tmbs.ch is associated with Trans Maritime Ltd, a company that specialises in European surface transport. Public descriptions characterise it as a market leader in handling shipments between the United Kingdom, Ireland and the Benelux states, with multiple daily departures. Organisations of this type routinely manage booking data, customs documentation, driver and vehicle records, customer invoices, and operational schedules. Because freight movements cross borders and involve many third parties, a compromise of internal systems can affect not only the firm’s own employees but also shippers, consignees and subcontractors whose information is stored for commercial and regulatory reasons. A ransomware incident at such a firm therefore carries consequences that extend beyond a single corporate network.

What data was at risk

The available facts state only that internal files were exfiltrated. No further breakdown—such as employee records, customer databases, financial documents or shipment manifests—has been publicly confirmed. Logistics companies typically hold contact details, contractual information, vehicle and driver identifiers, and commercial correspondence. Whether any of those categories were among the files claimed by LockBit3 is unconfirmed. The number of people whose data may have been involved is likewise unknown. Readers should treat any specific claim about particular data types as unverified until the organisation or independent investigators provide clearer detail.

The real-world impact

For individuals, the principal risks are secondary fraud and unwanted contact. If personal or business contact details, identity documents or financial references were among the internal files, those data could be used for phishing, invoice redirection or identity theft. For the organisation, operational disruption, potential regulatory scrutiny and loss of commercial confidence are the more immediate concerns. Because the scale remains undisclosed, it is not possible to quantify how many customers or partners may be affected; the prudent assumption is that anyone who has done business with the firm in recent years should remain alert to unusual communications that reference past shipments or invoices. No public evidence has established negligence on the part of the company; the facts simply record the listing and the claim of data exfiltration.

If your data was in this claimed breach

If you have worked with Trans Maritime Ltd or tmbs.ch, treat unsolicited emails or calls that mention recent shipments with caution. Verify any payment or document requests through a known, independent channel rather than replying to the message itself. Change passwords on accounts that may have been used in correspondence with the company, and enable multi-factor authentication where available. Monitor bank and credit statements for unexpected activity. Because the exact contents of the claimed exfiltration are unconfirmed, there is no definitive list of affected individuals; a free exposure scan of your email address against known breach data sets can at least indicate whether your address has already appeared in other public dumps. Keep records of any suspicious contact and report clear fraud attempts to the relevant national authorities.

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