high severity February 28, 2026 · 3 min read Unverified claim — what this is

SK-Telecom Listed by Coinbase Cartel Ransomware Group

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

South Koreas largest wireless carrier offering mobile services broadband IPTV and cutting-edge AI and IoT solutions
— from Coinbase Cartel’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.

SK-Telecom Listed by Coinbase Cartel Ransomware Group

On April 19, 2025, South Korea’s largest wireless carrier, SK Telecom, appeared on the leak site of the ransomware group known as coinbasecartel. The company, which provides mobile services, broadband, IPTV, and advanced AI and IoT solutions to millions of customers, is claimed to have had internal files exfiltrated during a ransomware attack.

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Reported Details of the Incident

Public reporting indicates that coinbasecartel added SK Telecom to its data-leak portal on that date. The listing states that internal files were taken during a ransomware operation, although the precise number of records or specific customer data types remains undisclosed in available reporting. Ransomware.live has mirrored the leak-site entry, making the claim accessible to researchers and the public. No independent confirmation of the exact volume or nature of the stolen files has been published beyond the group’s own statements.

Why This Matters for You and Your Family

When a major telecommunications provider is breached, the ripple effects reach ordinary customers like you. SK Telecom holds personal details on millions of South Koreans and international users, including names, contact information, service records, and potentially billing data. If any of that information reaches the open web or criminal marketplaces, it can be used to target you with phishing, identity theft, or harassment. Credential leaks from such incidents often cascade into account takeovers across other services where the same email and password are reused. Your family’s privacy is directly at stake because household addresses, phone numbers, and linked accounts frequently appear in these datasets.

The Doxxing and Identity-Chain Risks

Once internal files leave a company’s control, attackers and opportunistic criminals can piece together scattered pieces of your life. A phone number from one record links to an email in another; a billing address connects to social-media handles. These identity chains allow doxxing that starts with a gaming username and ends with your home address. Public reporting describes how credential leaks like this one frequently fuel follow-on attacks against both corporate and personal targets. Gaming accounts belonging to you or your children are especially vulnerable because they often share the same passwords or recovery emails used for mobile and broadband services.

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What the free scan actually returns

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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 February 28, 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 →

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