Sarcoma ransomware gang claims the theft of sensitive data from PCB maker Unimicron
February 13, 2025
The Sarcoma ransomware group announced a breach of the Taiwanese printed circuit board (PCB) manufacturing giant Unimicron.
The Sarcoma ransomware group claims to have breached Taiwanese PCB manufacturer Unimicron, leaked sample files, and threatened a full data release if no ransom is paid by Tuesday, February 20, 2025.
Unimicron Technology Corporation is a Taiwanese company specializing in the manufacturing of printed circuit boards (PCBs), high-density interconnects (HDI), and IC substrates. It is a key supplier in the semiconductor and electronics industries, providing critical components for products such as smartphones, computers, automotive electronics, and other high-tech applications.
Unimicron is a major supplier for companies like Apple, Intel, and other semiconductor giants, playing a crucial role in global supply chains. The company is headquartered in Taiwan and has manufacturing facilities in multiple countries.
Sarcoma ransomware operators claim to have stolen 377 GB of SQL files and documents.
The company confirmed that its subsidiary Unimicron Technology (ShenZhen) suffered a ransomware attack on January 30, 2025. However, it has yet to disclose a data breach.
The company is investigating the security breach and mitigating the attack with the help of an external cyber forensic team.
“The company will continue to enhance the security control of the network and information infrastructure
to ensure information security.” reads the announcement sent by the company to the Taiwan Stock Exchange (TWSE).
Sarcoma has been active since October 2024, and the gang is emerging as a major ransomware group in the threat landscape.
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Pierluigi Paganini
(SecurityAffairs – hacking, ransomware)