Ju Percussion Group
bd_cd36ee8483236806 · schema v1 · pii pii-v1
Full breach record for Ju Percussion Group →Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Sarcoma on its public extortion blog. It has not been validated by the victim or any regulator. Treat attribution and counts as the threat actor's assertion until a regulatory filing or victim disclosure corroborates them.
Source: Ransomware.live
Post text · scraped from the leak site
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. Thanks to the group's activities, however, the Ju Percussion Group soon became a household name throughout the island. In 1991, the Ju Percussion Group introduced its instruction system, which swept the country with its absorbing and authentic teaching format. At present, there are 30 existing percussion music schools around the worldGeo: Taiwan - Leak size: 1.6 TB Archive - Contains: Files
J jump to incidentP pin to compareR raw source
Incident timeline — mostly unverified
? — ?
Breach window unknown
Apr 17, 2025
Claim posted
—
No filing yet · watching
Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.
Claim → filing
—
Compliance clock
Not assessable
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.
No regulatory filing corroborates this yet — it is the attacker's own assertion. Watch this entity to be notified the moment a filing corroborates or contradicts it.
Source ceiling
- actor name
- victim claim
- ransom/leak status
- discovery date
- materiality
- notification
- affected count
- confirmed data types
- compliance clock
The ✕ fields stay blank until a regulatory filing or victim disclosure lands.
sarcoma
According to ransomware.live, Sarcoma is a ransomware group that debuted in October 2024, immediately ranking among the top three most active groups globally and surpassing 116 documented victims by mid-2025, targeting mid-market companies across manufacturing, retail, healthcare, legal, and business services with roughly 50% of victims in the United States.