TBM Service Group Listed by Coinbase Cartel Ransomware Group

On October 29, 2025, the ransomware group known as CoinbaseCartel added TBM Service Group to its public leak site, claiming that internal files had been exfiltrated from the managed services provider.

What Public Reporting Shows

Public reporting indicates that TBM Service Group, which provides onsite managed services including nightly maintenance and customer support for public transportation and related sectors, suffered a ransomware intrusion. The attackers claim to have stolen internal documents and posted proof on their dark-web leak page. No exact victim count inside TBM has been disclosed, and the precise volume or sensitivity of the files remains unclear from available reporting. The listing appeared on the group’s onion site, which is tracked by ransomware-monitoring platforms such as ransomware.live.

Why This Matters for You and Your Family

When a company that handles scheduling, customer records, or payment details for public-facing services is breached, the information inside those files can easily include names, addresses, phone numbers, email accounts, or even driver’s license data tied to everyday customers. If your family uses public transit, relies on managed facility services, or lives in an area served by TBM’s clients, your personal details may now sit in an attacker’s archive. Credential leaks from such incidents frequently cascade into account takeovers on unrelated services where the same email and password are reused.

The Doxxing and Identity-Chain Implications

Once internal files leave a company’s control, attackers and opportunistic criminals can chain disparate pieces of information together. An email address found in one document can be matched to a username on a gaming platform, a phone number in a customer spreadsheet, or a home address in a maintenance log. These links create a roadmap for doxxing, identity theft, or targeted harassment. Public reporting describes how ransomware groups increasingly publish or sell such datasets precisely because the real damage happens when multiple seemingly harmless records are combined.

CoinbaseCartel’s Publicly Known Track Record

Public reporting attributes the CoinbaseCartel name to a ransomware operation that emerged in 2024. The group has listed healthcare providers, logistics firms, and technology service companies in prior incidents. Its typical playbook involves initial access through compromised credentials or remote desktop vulnerabilities, followed by claimed exfiltration of sensitive files before encryption. The cartel then demands payment for decryption and non-disclosure; when victims refuse or miss deadlines, stolen data appears on the leak site to pressure them or to attract secondary buyers. Exact success rates and total past victims are difficult to verify, but the group maintains an active presence on dark-web leak directories.

What to do

• Run a DoxxScan to map every link between your emails, phone numbers, usernames, and real-world identity so you can see exactly what this claimed breach may have exposed.
• Rotate any password used at TBM Service Group or its client systems anywhere else it is reused, and switch on two-factor authentication through an authenticator app rather than SMS.
• Enable continuous DoxxScan monitoring across 13.1 billion+ breach records and more than 100 platforms so the next leak that touches your family is caught within hours instead of months.
• Cover the entire household with DoxxScan family protection, which extends to dependents and children’s gaming accounts that often chain back to the same addresses and emails.
• Let remediation specialists handle takedown requests across data brokers and exposed records while you focus on securing day-to-day accounts.

The incident underscores that a single managed-services breach can ripple outward and expose ordinary families in ways that are not immediately obvious. Starting with a clear picture of your current exposure and maintaining ongoing visibility is the most practical defense. DoxxScan by GalaxyWarden delivers that continuous monitoring across 13.1B+ breach records and 100+ platforms, AI-powered identity-chain mapping, hands-on remediation by specialists, and full household coverage that includes children’s gaming accounts.