Unimicron
bd_ab08914d7cfc3718 · schema v1 · pii pii-v1
Full breach record for Unimicron →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
Unimicron Made up of three strategic business units (SBU), namely PCB SBU, Carrier SBU, and IC Test SBU, Unimicron is currently among the top PCB and carrier manufactures in the world and a major supplier of HDI PCBs and carrier for world advanced mobile phones. Manufacturing bases are mainly set in Taiwan (Taoyuan, Hsinchu), Shenzhen of South China, Huangshi of Central China, and Kunshan and Suzhou of East China-Plants in China specialize in mass production, while in Taiwan provide high-end products to serve the market. In addition, to instantly respond to the demands of customers, besides establishing sales departments and representative offices in America, Europe, and Asia, there are also manufacturing bases in Germany and Japan to serve the customers there.Geo: Taiwan - Leak size: 377 GB Archive - Contains: Files, SQL
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Incident timeline — mostly unverified
? — ?
Breach window unknown
Feb 11, 2025
Claim posted
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No filing yet · watching
Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.
Claim → filing
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Compliance clock
Not assessable
Linked disclosures
Why this link?Press reports (1)
- Presssarcomabd_c7d81435e24fa1ae2025-01-30 · +12dCandidate
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.