high severity April 20, 2026 · 3 min read Unverified claim — what this is

SIG.biz Listed by Coinbase Cartel Ransomware Group

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

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

SIG.biz Listed by Coinbase Cartel Ransomware Group

On April 20, 2026, the ransomware group known as CoinbaseCartel added SIG.biz to its public leak site, claiming that internal files had been exfiltrated from the company during a ransomware attack.

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 SIG.biz

Get alerted the next time SIG.biz 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 SIG.biz’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 SIG.biz, a provider of digital identity and verification services, suffered a ransomware intrusion in which attackers gained access to internal systems and removed sensitive files. The group published proof of the breach on its onion-site leak page hosted via ransomware.live. As of the listing date, the precise number of individuals whose data may be exposed remains unknown. Available reporting describes the stolen material as internal files, though the full scope of exposed records has not been independently verified by third parties.

April 20, 2026 marks the public disclosure on the leak site. No ransom demand deadline has been publicly detailed in the initial listing, but ransomware groups of this type typically set short windows before releasing or selling the data.

Why This Matters for You and Your Family

When a company that handles identity verification is breached, the consequences reach far beyond the corporate perimeter. If you have ever used an online service that required government ID upload, address confirmation, or biometric checks, your personal documents or the metadata tied to them may now sit in an attacker’s archive. For families this can mean names, addresses, phone numbers, email accounts, and government ID details suddenly available for identity theft, loan fraud, or targeted scams.

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

Attributed to Coinbase Cartel · 213 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed April 20, 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

Coinbase Cartel — 213 incidents tracked

Every breach we've attributed to Coinbase Cartel, in one running log. See who else they've hit →

Related breaches

high October 01, 2026