high severity January 23, 2024 · 3 min read Unverified claim — what this is

stemcor.com Listed by Black Basta Ransomware Group

If you are a customer of stemcor.com, here’s what is being claimed, and what it would mean for you.

STEMCOR is a leading independently run service provider for the steel industry. We play a vital role, acting as an intermediary between customers and suppliers. We make complex transactions easy for buyers and sellers. With our specialised expertise and knowledge, we help customers choose from over 3,500 different grades of steel and raw materials available in the market. With our global infrastructure and connections, we ensure they get their product in the right place, at the right time, and at the right price. For suppliers, we use our relationships and long-standing expert knowledge to ens
— from Blackbasta’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.

stemcor.com Listed by Black Basta Ransomware Group

On January 23, 2024, the domain stemcor.com appeared on the leak site operated by the Black Basta ransomware group. The listing indicates that internal files were exfiltrated from Stemcor, a global steel industry service provider, during a ransomware attack. Anyone whose personal or business information passed through Stemcor’s systems may now be exposed, even though the exact number of affected records remains unknown.

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Details from the Leak Site

The Black Basta leak page for stemcor.com states that the company suffered a ransomware intrusion in which attackers copied internal files before encrypting systems. The disclosure does not quantify the volume of data taken, list specific file types, or name any individuals whose records were allegedly stolen. It simply states that exfiltrated material is now hosted on the group’s onion site and sets an implicit deadline for payment to prevent full publication. Public mirrors of the leak site, such as ransomware.live, preserve this original posting for verification.

Why This Matters for You and Your Family

When a company like Stemcor loses control of internal files, the information inside often includes names, addresses, contact details, contracts, invoices, and correspondence tied to customers, suppliers, and partners. If your employer, your steel supplier, or any business you deal with uses Stemcor’s services, your data could be among the records now in attackers’ hands. Internal files exfiltrated in these incidents frequently contain enough detail to enable identity theft, targeted phishing, or fraud against you and your household. Even without exact record counts, the exposure is real and permanent once the files reach criminal marketplaces.

Doxxing and Identity-Chain Risks

Stolen internal documents rarely stay isolated. Attackers and subsequent buyers can cross-reference names, email addresses, phone numbers, and business relationships found in the files with other breaches. This creates long identity chains that link your professional activity to personal accounts, family members, and even children’s online profiles. A single leaked business email can lead to credential stuffing attempts on personal services, turning one corporate breach into repeated account takeovers. Gaming accounts belonging to you or your children are especially vulnerable because the same passwords or recovery details often appear across work and home environments.

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What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo

value redacted in this samplephone, household, property recordsBeenVerified

value redacted in this sample580 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach

unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Report details & sourcing

Attributed to Blackbasta · 522 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed January 23, 2024

Last reviewed August 8, 2026

Affected Unconfirmed

By GalaxyWarden Threat Research · Editorial & sourcing standards

Unverified claim — what this report is

This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.

Editorial & sourcing policy

GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.

Threat-actor tracker

Blackbasta — 522 incidents tracked

Every breach we've attributed to Blackbasta, in one running log. See who else they've hit →

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