high severity April 11, 2024 · 3 min read Unverified claim — what this is

semilab.com Listed by dAn0n Ransomware Group

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

The total size of stolen information is 1.47TB. This leak contains corporate information of the company: Financial, legal, information on employees, partners and clientsб drawingы and scheme of constr...
— from dAn0n’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.

semilab.com Listed by dAn0n Ransomware Group

On April 11, 2024, semiconductor equipment manufacturer Semilab appeared on the leak site operated by the dAn0n ransomware group. The listing states that attackers exfiltrated 1.47 TB of internal files during a ransomware incident. The company has not yet published a formal breach notification quantifying the number of affected individuals, so the precise scale of personal data exposure remains unknown.

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Details in the Leak Listing

The dAn0n leak site entry, still accessible via its onion address as of the initial publication date, claims the stolen archive contains corporate information including financial records, legal documents, employee data, partner and client details, plus engineering drawings and construction schematics. The disclosure indicates that attackers first encrypted systems and then downloaded the material before offering it for public download if a ransom is not paid. No sample files have been released in the initial posting, and the listing does not specify which exact categories of personal information—such as Social Security numbers, dates of birth, or contact details—were included.

1.47 TB of exfiltrated data represents a significant volume that could easily encompass thousands of employee and customer records alongside proprietary technical material. Because the primary source does not break down the contents by record type or count, the exact risk to any single individual cannot yet be measured with precision.

Why This Matters for You and Your Family

When a company that handles employment, client, or partner records suffers a ransomware breach, the information taken can appear in extortion campaigns or on underground markets. If you have ever worked at Semilab, been a customer, or had your information shared with them through a vendor relationship, your details may now sit inside an attacker-controlled archive. Even without exact numbers, the disclosure’s reference to employee, partner, and client information means names, addresses, financial details, and possibly government identifiers could be exposed.

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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 dAn0n · 33 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed April 11, 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

dAn0n — 33 incidents tracked

Every breach we've attributed to dAn0n, in one running log. See who else they've hit →

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