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high severity April 14, 2023 · 3 min read Unverified claim — what this is

osg.co.jp Listed by lockbit3 Ransomware Group

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

In 1968, OSG Corporation established its very first overseas subsidiary in the United States. Since then, we have built a production, sales and technical support network spanning 33 countries. All of our facilities are optimally located to serve our...

— from LockBit’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.
osg.co.jp Listed by lockbit3 Ransomware Group

On April 14, 2023, Japanese cutting-tool manufacturer OSG Corporation (osg.co.jp) appeared on the LockBit 3.0 ransomware leak site. The listing states that internal files were exfiltrated during a ransomware attack; the exact number of records exposed and the specific data types remain undisclosed by the group.

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Details from the Leak Site

The LockBit 3.0 panel entry states that OSG Corporation suffered a ransomware intrusion and that attackers successfully removed internal files before encryption. No victim count, no sample documents, and no ransom amount are published on the listing itself. The disclosure indicates the data was taken from the company’s corporate network and is now held for extortion purposes. Public mirrors of the leak site, such as ransomware.live, preserve the original post dated April 14, 2023, at the onion address provided in the source link.

Why This Matters for You and Your Family

When a global manufacturer like OSG has internal files stolen, anyone whose personal information ever passed through that network — employees, customers, suppliers, or business partners — faces real risk. Internal files frequently contain spreadsheets with names, addresses, dates of birth, tax identifiers, banking details, or employee benefit records. Even if the exact contents are not yet public, the mere fact that the data has left OSG’s control means it can surface on dark-web markets months or years later. For ordinary families this translates into higher chances of identity theft, fraudulent loans opened in your name, or targeted phishing campaigns that reference real details only OSG would have known.

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The Doxxing and Identity-Chain Risk

Stolen internal files rarely stay isolated. A single spreadsheet linking an employee’s work email to a personal phone number can be combined with other breaches to build a complete identity chain. Attackers then target linked accounts — including gaming logins used by children — because the same password or security question often protects both work and home life. Once a gaming account tied to a family address is hijacked, it becomes another data point that strengthens the doxxing profile. Credential leaks like this one cascade into account takeovers that expose chat logs, payment methods, and location history.

LockBit 3.0’s Known Track Record

Public reporting attributes the LockBit 3.0 variant to a ransomware operation that first appeared under the LockBit name in 2019 and rebranded to version 3.0 in early 2022. The group has claimed responsibility for attacks on hundreds of organizations worldwide, including manufacturing firms, healthcare providers, and local governments. Their typical playbook begins with initial access gained through compromised remote desktop credentials or phishing, followed by rapid lateral movement, data exfiltration, and deployment of ransomware. After encryption they publish a countdown on their leak site and threaten to sell or publicly release the stolen files if payment is not received. The group’s leak site has remained one of the most active ransomware boards despite law-enforcement actions against earlier iterations.

What to do

  • Run a DoxxScan to map every link between your handles, emails, phone numbers, and real identity so you can see exactly where OSG-related data may surface.
  • Rotate any password you ever used at osg.co.jp or related corporate systems and enable 2FA through an authenticator app everywhere that password was reused.
  • Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next exposure of your information is caught in hours rather than months.
  • Cover the household with DoxxScan family protection that extends to dependents and children’s gaming accounts, which often chain back to the same breached corporate data.
  • Let remediation specialists handle takedown requests for any exposed personal documents or broker listings that appear after this incident.

The OSG Corporation breach is a reminder that even established international manufacturers remain targets, and the data they hold about ordinary people can fuel long-term identity crimes. Start your DoxxScan trial today; its continuous monitoring, AI-powered identity-chain mapping, hands-on remediation by specialists, and household coverage give you and your family a practical defense against the expanding ripple effects of incidents like this one.

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.

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Report details & sourcing

Severity High the filing does not enumerate what was exposed
Disclosed April 14, 2023
Last reviewed August 8, 2026
Affected Unconfirmed
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.
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