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high severity October 16, 2022 · 3 min read Unverified claim — what this is

oomiya.co.jp Listed by lockbit3 Ransomware Group

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

oomiya.co.jp was listed on the lockbit3 ransomware leak site. The group claims to have stolen internal data.

— 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.
oomiya.co.jp Listed by lockbit3 Ransomware Group

On October 16, 2022, Japanese company oomiya.co.jp appeared on the LockBit 3.0 ransomware leak site. The listing states that internal files were exfiltrated during a ransomware attack, although the exact number of records affected and the specific types of data taken remain undisclosed by the group.

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Details from the Leak Site Listing

The primary disclosure on the LockBit 3.0 leak site claims that oomiya.co.jp suffered a ransomware intrusion in which attackers successfully stole internal files before encrypting systems. No victim count is provided, and the listing does not detail the precise data categories involved. The disclosure indicates the company was given a deadline to negotiate or face full publication of the allegedly stolen material. Public reporting on LockBit 3.0 confirms this is their standard approach of dual extortion: demanding ransom for decryption keys and separately threatening to release exfiltrated data.

Why This Matters for You and Your Family

When a company that handles customer orders, payments, or personal details is breached, your information can be caught in the net even if you never directly interacted with the victim organization. Internal files exfiltrated often contain spreadsheets of customer records, supplier contacts, employee payroll data, or email correspondence that include names, addresses, phone numbers, and financial details. For ordinary people and their families, this translates into heightened risk of identity theft, phishing campaigns, and unwanted exposure long after the initial incident fades from headlines.

The fact that the breach surfaced through a ransomware leak site rather than a voluntary company notification means victims like you may not receive timely warnings. Many families only discover their data was involved when fraud appears on statements or when unsolicited contact begins.

The Doxxing and Identity-Chain Implications

Ransomware groups rarely stop at one dataset. A single exposed email or phone number from an internal file can be chained with information from dozens of other breaches to build a complete profile. Attackers link your work email to personal accounts, gaming usernames, family member names, and home addresses. This identity chain makes targeted doxxing, SIM-swapping, and account takeovers far easier. Credential leaks of this nature frequently cascade into gaming accounts belonging to you or your children, where stolen logins lead to further personal details being harvested and sold on underground forums.

LockBit 3.0 Track Record and Playbook

Public reporting attributes the LockBit ransomware operation to a professionalized cybercrime group that first emerged in 2019 under the name LockBit 2.0 before rebranding as LockBit 3.0 in 2022. The group has hit thousands of organizations worldwide, including manufacturers, healthcare providers, and government entities. Their typical playbook begins with initial access gained through compromised remote desktop credentials, phishing, or exploited vulnerabilities. Once inside, they exfiltrate sensitive files over weeks, deploy ransomware to encrypt systems, and then launch a double-extortion campaign via their leak site. If ransom is not paid by the stated deadline, they publish samples and eventually the full archive. The October 16, 2022 listing of oomiya.co.jp fits this established pattern exactly.

What to do

  • Run a DoxxScan to map every link between your handles, emails, phone numbers, and real identity, with cleanup of exposed data by Warden specialists.
  • Rotate any password you used at oomiya.co.jp or related services anywhere it has been reused, and enable 2FA through an authenticator app rather than SMS.
  • 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 coverage that extends to dependents and children’s gaming accounts that often chain back to the same addresses and credentials.
  • Let remediation specialists handle takedown requests across data brokers and leak sites for you while you focus on securing day-to-day accounts.

The speed with which ransomware groups move from breach to public shaming leaves little room for delay. Starting proactive defense now can break the identity-chain cycle before criminals exploit it. DoxxScan by GalaxyWarden delivers continuous monitoring across 13.1 billion+ breach records and more than 100 platforms, AI-powered identity-chain mapping, hands-on remediation by specialists, and full household coverage that includes children’s gaming accounts at risk from credential leaks 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 sample582 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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oomiya.co.jp is one listing. Your email is probably in others.
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Report details & sourcing

Severity High
Disclosed October 16, 2022
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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