manfil.com.br Listed by lockbit3 Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

In April 2023, the Brazilian steel and iron supplier manfil.com.br appeared on a ransomware group’s leak site, raising immediate questions for anyone who has done business with the company, worked there, or shared personal or commercial details with it. When internal files are claimed to have been taken in a ransomware attack, the practical risk is that contracts, contact lists, financial records, or employee information could surface online or be misused, even if the full scope remains unclear.

Public reporting lists the organisation as having been claimed by the LockBit3 ransomware group on or around 11 April 2023. The number of people affected is unknown, and the only description of what was taken is that internal files were allegedly exfiltrated. For customers, suppliers, and staff, that limited public picture still warrants attention: ransomware listings are often used to pressure organisations, and the data involved can affect real people long after the initial claim.

Inside the incident

According to available breach records, manfil.com.br was listed by the LockBit3 ransomware group, with the listing reported on 11 April 2023. The records state that internal files were exfiltrated in a ransomware attack. Beyond that, public detail is limited. The number of people affected is unknown. No confirmed file counts, specific document names, ransom demands, or technical method of intrusion have been disclosed in the material provided. There is also no public confirmation in these facts of whether the organisation paid a ransom, recovered systems, or independently verified the group’s claims.

What is known is the nature of the claim itself: a ransomware group asserted that it had taken internal material from the company and listed the victim on its leak site. Such listings are a standard pressure tactic; they do not by themselves prove the full contents or the eventual publication of every file. Without further disclosure from the organisation or independent verification, the precise timeline of the intrusion, the systems involved, and the exact volume of data remain undisclosed.

The group behind it: lockbit3

LockBit3 is a well-documented ransomware operation that has, over several years, targeted organisations across many countries and sectors. Groups operating under the LockBit name have typically used a double-extortion model: encrypting systems to disrupt operations while also copying data and threatening to publish it if a ransom is not paid. Affiliates often gain initial access through phishing, exposed remote services, or stolen credentials, then move laterally before deploying ransomware and exfiltrating files.

LockBit has maintained leak sites where it names victims and, in some cases, posts samples or larger archives of stolen data. The group has been linked to numerous high-profile incidents worldwide and has been the subject of international law-enforcement attention. In this case, the facts establish only that LockBit3 listed manfil.com.br and claimed internal files were exfiltrated. No further statements from the group about this specific victim—such as detailed inventories, ransom amounts, or proof packages—are included in the available record, so those elements should be treated as unconfirmed beyond the listing itself.

About manfil.com.br

Manfil Ferro e Aço, associated with the domain manfil.com.br, is described in public summary material as a Brazilian company that began activities in 2000 under the earlier name Coferpa Ferro e Aço. With more than two decades in the market, it presents itself as a supplier in the iron and steel sector, operating from a substantial industrial footprint that includes a large built area and heavy-capacity weighing and rebar-framing services. Organisations of this type typically serve construction, manufacturing, and infrastructure customers and maintain commercial relationships with suppliers, transporters, and clients.

A breach involving such a firm is consequential because steel and construction-supply businesses routinely hold operational and commercial data: customer and supplier contact details, order and delivery records, pricing and credit information, employee and contractor data, and internal operational documents. Even when the exact contents of a claimed theft are not published, the sector’s reliance on trusted B2B relationships means that exposure of internal files can affect not only the company but also the wider network of people and firms that deal with it.

What was likely exposed

The available facts name the exposed material only as “internal files exfiltrated in a ransomware attack.” No inventory of specific data types—such as names, identity documents, financial account numbers, or email inboxes—is provided, and the number of affected individuals is unknown. It is therefore not possible to state as fact which categories of personal or commercial information were taken.

Companies in the iron and steel supply sector commonly hold customer and supplier registries, invoices and payment records, logistics and inventory data, employee and payroll-related information, and internal correspondence or contracts. Any of those could fall under a broad description of “internal files,” but that remains an inference about typical holdings rather than a claimed list for this incident. Readers should treat the exact contents as unconfirmed until the organisation or a verified disclosure provides more detail.

What's at stake

For individuals whose details may have been among internal files, the practical risks include unwanted contact, phishing that impersonates the company or its partners, and misuse of business or personal information for fraud. Commercial data—pricing, contracts, or credit terms—can also be used by competitors or by criminals who craft convincing social-engineering messages. Employees or contractors could face similar exposure if HR or operational records were included.

For the organisation, a ransomware claim and possible data theft can mean operational disruption, cost of investigation and recovery, strain on customer and supplier trust, and potential regulatory or contractual obligations depending on Brazilian data-protection rules and the nature of any personal data involved. Because the scale and contents remain undisclosed, the full impact cannot be measured from public facts alone; the stakes are real but still partly undefined.

What to do if you're exposed

If you have worked with, supplied, or been employed by manfil.com.br, treat unsolicited messages that reference the company or your past dealings with extra caution. Prefer official channels you already trust when checking whether any notice has been issued. Monitor financial and commercial accounts for unusual activity, and consider updating passwords on accounts that may have shared credentials or recovery details with work-related systems. If you receive extortion or phishing attempts, document them and report them through appropriate local channels rather than engaging.

You can also run a free exposure scan of your email address to check whether your information has already appeared in known breach datasets. That step does not confirm or rule out involvement in this specific incident, but it can help you see whether your address has surfaced elsewhere and prioritise further protections such as unique passwords and multi-factor authentication where available.

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