high severity February 05, 2026 · 3 min read Unverified claim — what this is

Exco Listed by Sinobi Ransomware Group

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

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

On February 5, 2026, French accounting and consulting network Exco appeared on the leak site of the sinobi ransomware group. The listing indicates that internal files were exfiltrated during a ransomware attack on the firm, which serves businesses across France and internationally with accounting, audit, tax, HR, legal, and corporate management services.

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 Exco

Get alerted the next time Exco 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 Exco’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 on the sinobi leak site describes the incident as a successful ransomware deployment followed by data exfiltration. The exposed material consists of internal files. The exact number of people whose personal information appears in the files remains unknown. No confirmed timeline of initial access or precise volume of records has been published. The leak site listing itself serves as the primary public evidence of the breach.

Why This Matters for You and Your Family

When an accounting firm like Exco is breached, client records containing names, addresses, tax identifiers, financial details, and correspondence can be exposed. If you or your family have ever used an accountant, auditor, or business advisor connected to the Exco network, your information may now sit in an attacker-controlled archive. Financial and tax data is especially valuable because it can be used for identity theft, fraudulent loan applications, or targeted scams that feel personal and credible. Ordinary families rarely discover these leaks until months later when unexpected bills or tax notices arrive.

The Doxxing and Identity-Chain Implications

Stolen internal files often contain more than spreadsheets. They can include email addresses, phone numbers, client notes, and references to spouses, children, or business partners. Attackers chain these fragments together: an email from one record links to a reused password from an earlier breach, which leads to a gaming account or social-media handle, which reveals home addresses and family relationships. This identity-chain effect turns a single corporate breach into long-term personal exposure. Credential leaks like this one frequently cascade into account takeovers, including gaming accounts belonging to you or your children.

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.

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

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).

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

Attributed to Sinobi · 274 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed February 05, 2026

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 →

Related breaches

high October 01, 2026