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high severity August 01, 2023 · 3 min read Unverified claim — what this is

Kogetsu Listed by mallox Ransomware Group

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

Kogetsu was listed on the mallox ransomware leak site. The group claims to have stolen internal data.

— from Mallox’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.
Kogetsu Listed by mallox Ransomware Group

On August 1, 2023, Japanese company Kogetsu appeared on the public leak site operated by the Mallox ransomware group. 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 both the attackers and the victim.

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Primary Disclosure Details

The Mallox leak site entry for Kogetsu states the company was listed after refusing or failing to meet the group’s extortion demands. It states that internal files were stolen but provides no further breakdown of the contents. The disclosure does not quantify affected records, name the precise systems compromised, or list sample data. Public views of the page, tracked through ransomware.live at https://www.ransomware.live/id/S29nZXRzdUBtYWxsb3g=, show only the company name, the group’s logo, and a generic claim of successful data theft. No formal breach notification from Kogetsu has surfaced publicly at the time of this analysis, leaving many concrete details unknown.

Why This Matters for You and Your Family

When a company’s internal files are taken in a ransomware incident, the information often includes employee records, customer contracts, invoices, or partner communications that contain personal details. If your name, address, email, phone number, or financial information appears in any of those files, you and your family are now at elevated risk. Even without an exact victim count, the high severity label reflects the potential for identity theft, phishing campaigns, or targeted fraud that can follow such leaks. Ordinary families who have done business with or worked for affected organizations frequently discover months later that their data has been packaged and sold on underground forums.

Doxxing and Identity-Chain Risks

Stolen internal files frequently create long identity chains. An email address found in one document can be linked to accounts on other services; a phone number can tie your online handles to your physical address. These connections allow attackers to build detailed profiles for doxxing, account takeover, or extortion. Credential leaks of this nature routinely cascade into gaming accounts belonging to you or your children, where usernames and reused passwords become entry points for further compromise. Once an identity chain is established, a single breach can expose family members across multiple platforms for years.

Mallox Group Track Record

Public reporting attributes Mallox (also known as Mallox ransomware) as a ransomware-as-a-service operation that emerged in 2021. The group has targeted organizations across Asia, Europe, and North America, with prior victims including manufacturing firms, healthcare providers, and technology companies. Their typical playbook involves initial access through vulnerable remote desktop services or phishing, followed by exfiltration of internal data before deploying ransomware. If payment is not received, Mallox publishes samples or full datasets on their leak site to pressure victims. The group’s extortion style combines data-theft threats with public shaming, a pattern consistent across dozens of listed incidents.

What to do

  • Run a DoxxScan to map every link between your handles, emails, phone numbers, and real identity, including cleanup of exposed records.
  • Rotate any password you used at Kogetsu or related services anywhere it has been reused, and switch to 2FA through an authenticator app rather than SMS.
  • Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next exposure surfaces in hours instead of months.
  • Cover the household with DoxxScan family protection that extends to dependents and children’s gaming accounts vulnerable to credential-based takeovers.
  • Let remediation specialists handle data-broker takedown requests and follow-up monitoring on your behalf.

The Kogetsu listing is a reminder that ransomware groups continue to exploit businesses that handle ordinary personal information, turning corporate incidents into direct family risks. Starting a DoxxScan trial gives you continuous monitoring across 13.1B+ breach records and 100+ platforms, AI-powered identity-chain mapping, and hands-on remediation by specialists who can protect both your household and your children’s gaming accounts from cascading doxxing chains. Source: https://www.ransomware.live/id/S29nZXRzdUBtYWxsb3g=

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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Report details & sourcing

Severity High
Disclosed August 01, 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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