Matusima Listed by 8base Ransomware Group

On May 27, 2024, Japanese firm Matusima Corporation appeared on the leak site operated by the 8base ransomware group. The company, which sells and maintains agricultural machinery, construction equipment, plumbing systems, vehicles, and solar energy installations, is claimed to have had internal files exfiltrated during a ransomware incident. The listing does not specify the number of records affected or the exact data types beyond claiming that internal files were taken.

Details from the Leak-Site Listing

The primary disclosure on the 8base leak site states that Matusima Corporation suffered a ransomware attack in which attackers successfully exfiltrated internal files. No victim count is provided, and the listing does not detail the volume or specific categories of data stolen. The entry was first observed on May 27, 2024, and remains active on the onion site. Public mirrors such as ransomware.live corroborate the listing without adding new facts from the threat actor.

Why This Matters for You and Your Family

When a company like Matusima is breached, customer, vendor, and partner information often sits inside the very internal files now held by criminals. Even if your name is not on the leak site today, business contact details, invoices, contracts, and payment records can expose you and your family to identity theft and fraud. Small and mid-sized businesses rarely disclose the full scope quickly, leaving individuals uncertain about their exposure for weeks or months.

Doxxing and Identity-Chain Risks

Exfiltrated internal files frequently contain spreadsheets that link names, email addresses, phone numbers, physical addresses, and sometimes national identification numbers. Attackers chain this information with data from previous breaches to build complete profiles. A single leaked business email can lead to targeted phishing that compromises personal accounts, which in turn expose family members. Credential leaks like this one cascade into account takeovers, especially for shared work-and-home logins or for children’s gaming accounts tied to the same household email or address.

8base’s Known Track Record

Public reporting attributes 8base with emerging in early 2022 and rapidly becoming one of the most active ransomware-as-a-service operators. The group is known for targeting mid-market companies across manufacturing, construction, and professional services. Their typical playbook involves initial access through vulnerable remote desktop services or phishing, followed by deployment of custom ransomware, aggressive data exfiltration, and dual extortion: demanding payment to decrypt files and threatening to publish stolen data on their leak site if the ransom is not paid. 8base often gives victims short deadlines measured in days rather than weeks.

What to do

• Run a DoxxScan to map every link between your handles, emails, phone numbers, and real identity, then use the cleanup of Warden to remove what you can.
• Rotate any password you have ever used at Matusima or its partners anywhere it is reused, and switch on 2FA through an authenticator app rather than SMS.
• Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next exposure surfaces in hours instead of months.
• Cover the household with DoxxScan family protection that extends to dependents and children’s gaming accounts that chain back to the same address or email.
• Let remediation specialists handle takedown requests across data brokers and extortion sites on your behalf.

The pace of ransomware disclosures shows no sign of slowing, and families are often the last to learn their data has been weaponized. Starting with a DoxxScan gives you continuous monitoring across 13.1B+ breach records and 100+ platforms, AI-powered identity-chain mapping that connects scattered handles to your real identity, and hands-on remediation by specialists who manage takedowns for the entire household, including children’s gaming accounts. Acting early limits how far criminals can travel down the identity chain that began with Matusima’s internal files.