mjcelco.com Listed by blackbasta Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

People connected to MJ Celco — employees, their families, customers, and suppliers — face practical questions after the company was listed by the blackbasta ransomware group. Public reporting indicates that internal files were claimed to have been taken, raising the possibility that personal and business information could circulate beyond the organisation’s control.

The listing was reported on March 19, 2024. The number of people affected remains unknown, and independent confirmation of the full scope has not been published. What is known so far is limited to the group’s claim and the categories of material it said it obtained.

Breaking down the breach

According to the reported listing, blackbasta claimed responsibility for a ransomware attack on mjcelco.com in which internal files were exfiltrated. The group stated that the volume of data involved was approximately 1.2 terabytes. No further public detail has been released about the precise date of intrusion, the initial access method, or whether systems were encrypted in addition to the claimed data theft. The number of individuals whose information may be involved is listed as unknown. The only concrete description available is the group’s own summary of the material it says it holds.

Inside blackbasta

Blackbasta is a ransomware operation that has been active since around 2022 and is widely documented for using double-extortion tactics: encrypting systems while also stealing data and threatening to publish it if a ransom is not paid. The group typically operates as a ransomware-as-a-service model, partnering with affiliates who gain initial access through methods such as phishing, compromised credentials, or exploitation of exposed remote services. Once inside a network, operators move laterally, escalate privileges, and stage large volumes of data for exfiltration before deploying encryption. Blackbasta has previously listed victims across manufacturing, professional services, and other sectors on its leak site. In this case, the listing of mjcelco.com is a claim by the group; it has not been independently verified in the available public record.

About mjcelco.com

MJ Celco is a metal-stamping and fabricating company based in Schiller Park, Illinois. Public information associated with the organisation states that it employs 225 people and operates approximately 255,000 square feet of manufacturing space. Its stated focus is delivering quality metal components, competitive pricing, and customer service. Companies of this type routinely hold engineering drawings, project files, financial records, customer and supplier details, and employee personnel information. A ransomware incident at such a firm can therefore affect both operational continuity and the privacy of individuals whose data is stored in those systems.

What was likely exposed

The blackbasta listing describes the material as internal files taken in a ransomware attack and gives an approximate total size of 1.2 terabytes. The group’s own summary names the following categories:

• Projects, engineering, and drawings
• Financial data
• Employees’ personal folders and related material

Exact file counts, specific personal identifiers, or confirmation that every listed category was fully taken have not been independently verified. Organisations in metal fabrication typically maintain design files, quotes, invoices, payroll and benefits records, and correspondence; whether any particular individual’s data is present remains unconfirmed.

Why it matters

For employees, the presence of personal folders could mean exposure of addresses, contact details, tax or banking information, or other sensitive records that can be used for identity theft, phishing, or social engineering. Financial data and project files may contain commercial terms, customer lists, or proprietary designs whose disclosure could harm business relationships or create competitive disadvantage. Because the number of people affected is unknown and the precise contents are unconfirmed, individuals cannot yet know with certainty whether their own information is involved. The organisation itself faces potential operational disruption, regulatory scrutiny, and the cost of investigation and remediation. These risks are concrete even when the full scale remains undisclosed.

Were you affected?

If you are a current or former employee, contractor, customer, or supplier of MJ Celco, treat the possibility of exposure seriously until more information is available. Monitor financial accounts and credit reports for unusual activity, be alert to unexpected emails or calls that reference company details, and consider placing a fraud alert with credit bureaus if you believe your personal data may have been involved. Change passwords on any accounts that reused credentials linked to work systems. 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. Official notifications, if any are issued by the company or regulators, should be followed carefully for further guidance.

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