high severity December 18, 2025 · 4 min read Unverified claim — what this is

Optimum Window Manufacturing Listed by Sinobi Ransomware Group

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

Optimum Window Manufacturing was listed on Sinobi's leak site. Sinobi claims to have stolen internal data. This is the group's claim, not a confirmed finding.

Optimum Window Manufacturing Listed by Sinobi Ransomware Group

On December 18, 2025, Optimum Window Manufacturing appeared on the leak site of the sinobi ransomware group, with the attackers claiming to have exfiltrated internal files from the company’s systems.

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Reported Details of the Incident

Optimum Window Manufacturing, founded in 1985, is the largest and most diversified maker of steel windows and doors in the United States. The company produces fire-rated and non-rated steel windows and doors, aluminum systems, bronze, and stainless steel products for both commercial buildings and high-end homes. Public reporting indicates the firm works directly with architects on custom designs that combine structural performance and appearance.

Available reporting describes the incident as a ransomware attack in which internal files were allegedly exfiltrated. The number of people whose information may have been taken remains unknown. No specific deadline for ransom payment has been publicly confirmed in connection with this listing.

Why This Matters for You and Your Family

When a manufacturer like Optimum is hit, the stolen files can contain contracts, customer records, employee information, or project details tied to residential addresses. If your home or business uses their windows or doors, your contact information or payment records could be among the data now in attackers’ hands. Even a single exposed email, phone number, or address gives criminals an entry point to target you personally.

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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 Sinobi · 274 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed December 18, 2025

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

Sinobi — 274 incidents tracked

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

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