high severity April 17, 2025 · 3 min read Unverified claim — what this is

Ju Percussion Group Listed by Sarcoma Ransomware Group

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

Ju Percussion Group To date, the group has played in 33 different countries around the world, and cultivated more than 130,000 percussion learners by means of its instruction system. The growth of the Ju Percussion Group is a reflection of the development of contemporary percussion on the island of Taiwan. In 1986, the Ju Percussion Group met at a hot pot restaurant in Taipei and announced to the world that Taiwan's very first professional percussion band had been born. When the Ju Percussion Group was first established, most people in Taiwan were unfamiliar with its percussion music genre. Th
— from Sarcoma’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.

Ju Percussion Group Listed by Sarcoma Ransomware Group

On April 17, 2025, the Ju Percussion Group appeared on the leak site of the sarcoma ransomware group after its internal files were allegedly exfiltrated during a ransomware attack. The Taiwan-based organization, which has introduced percussion music to more than 130,000 learners across 33 countries, now faces the public exposure of sensitive company documents that could contain staff names, contact details, financial records, and operational data.

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What Public Reporting Shows

Public reporting indicates the Ju Percussion Group was listed on the sarcoma leak site on April 17, 2025. The incident stems from a ransomware deployment in which attackers encrypted systems and removed internal files before demanding payment. No confirmed victim count for individuals has been released, and the precise volume or exact contents of the stolen files remain undisclosed in available reporting. The group was founded in 1986 in Taipei and has built a reputation as Taiwan’s first professional percussion ensemble.

Why This Matters for You and Your Family

When any organization that holds personal information suffers a breach, the data can quickly reach criminals who target ordinary people. If you or your family members have taken classes, attended performances, purchased merchandise, or registered children for instruction through the Ju Percussion Group, your names, addresses, phone numbers, email accounts, or payment details may now sit in files available to extortionists. Credential leaks like this one often cascade into account takeovers on email, banking, or social media, turning a single breach into repeated harassment or financial loss for households.

The Doxxing and Identity-Chain Implications

Stolen internal files frequently link real names to email addresses, phone numbers, and sometimes family member references. Attackers can combine this information with data from earlier breaches to build detailed profiles. A parent’s registration for a child’s drumming class, for example, can expose the child’s name, age, school, and gaming usernames if those details were ever shared. Once handles are connected to real identities, doxxing campaigns, targeted phishing, and even physical intimidation become easier. Credential leaks like this one are especially dangerous for gaming accounts belonging to you or your children because the same passwords or recovery emails often protect both family services and online game profiles.

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Report details & sourcing

Attributed to Sarcoma · 141 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed April 17, 2025

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.

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Sarcoma — 141 incidents tracked

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