high severity September 29, 2025 · 4 min read Unverified claim — what this is

Petro-Diamond (petrodiamond.com) - subsidiary of Mitsubishi Corporation Listed by J Ransomware Group

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

Petro-Diamond is a commodity trading subsidiary of Mitsubishi Corporation. It's involved in the trade and marketing of petroleum and its derivatives, liquefied petroleum gas (LPG), and carbon-related materials. Also, they handle petrochemicals and participate in energy project developments.
— from the group that posted this listing’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.

Petro-Diamond (petrodiamond.com) - subsidiary of Mitsubishi Corporation Listed by J Ransomware Group

On September 29, 2025, Petro-Diamond, a commodity trading subsidiary of Mitsubishi Corporation, appeared on the leak site of the J Ransomware Group. The attackers claim to have exfiltrated internal files during a ransomware incident at the company, which trades petroleum, liquefied petroleum gas, petrochemicals, and carbon-related materials.

Already exposed?

You can’t unleak data. You can take away what it’s worth.

A leaked record is where it starts, not where it ends. What turns it into your front door is the look-up sites publishing your address beside your name — and those are what an AI reads when somebody asks about you. The free scan shows you both. We write to 580 companies.

See what is exposed about you — free scan →

Watch Petro-Diamond

Get alerted the next time Petro-Diamond files a breach with any US regulator — the filing, dated and sourced. A free single-company slice of Signals; no account needed.

We’ll email you only about Petro-Diamond’s future breach filings and how to watch a whole vendor list — not general marketing. Unsubscribe any time.

Watching your whole vendor list (50 to 500 companies, by tier) is GalaxyWarden Signals.

What Public Reporting Shows

Public reporting indicates that Petro-Diamond’s internal documents were taken and are now listed for download or auction on the group’s dark-web portal. The exact number of affected individuals remains unknown because the exposed material consists primarily of corporate files rather than a customer database. No confirmed samples of personally identifiable information have been independently verified by third parties at the time of writing, though the presence of internal files increases the chance that employee, vendor, or partner records were included.

September 29, 2025 marks the public listing date. The breach type is a classic ransomware attack combining encryption with data theft. Industry research from sources such as DoxxScan™ continuous monitoring indicates that employee and partner details from energy-sector firms frequently surface in later identity-theft campaigns once initial leaks occur.

Why This Matters for You and Your Family

Even when a breach starts at a business, the ripple effects reach ordinary people. If you or anyone in your household has ever worked with Petro-Diamond, supplied them, or shared contact details through an energy-related transaction, your information could be inside those stolen files. Once criminals obtain names, emails, phone numbers, or addresses, they can combine them with data from dozens of other breaches to build a complete profile.

You’ve used today’s 5 free articles · resets tomorrow

Create a free account to keep reading

The rest of this article comes straight back — free, no card, nothing you’ve already read goes away. Then see whether your own data is exposed too: the scan on this site is free with or without an account, and the account is what keeps the result after the emailed link expires.

Free reader account

No card, no charge. You read the blog without a limit — every article, no daily count — and it saves your exposure-scan results so you can open them again after the emailed link expires. We won’t email you anything else unless you tick the box asking us to. The next step shows what the paid plans add — free stays the first option on it.

Create a free account →

Free accounts are for personal use. If you’re reading for a company, that’s Signals (terms).

Reading this for a company?

GalaxyWarden Signals watches the organisations you name and emails you when one of them actually discloses — SEC 8-K Item 1.05 filings and corroborated breach records, with a JSON API. It monitors companies, not people: it does not scan you and does not remove your personal data.

See GalaxyWarden Signals →

Or make a free reader account first

Already have an account? Log in

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

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.

Related breaches

high October 01, 2026