February 12, 2025 By Bill Toulas
A relatively new ransomware operation named ‘Sarcoma’ has claimed responsibility for an attack against the Unimicron printed circuit boards (PCB) maker in Taiwan.
The cybercriminals have published samples of files allegedly stolen from the company’s systems during the attack and threaten to leak everything next week if a ransom is not paid.
In a new listing added to Sarcoma’s leak site yesterday, the threat actors claim to be holding 377 GB of SQL files and documents exfiltrated from the Taiwanese company.

Source: BleepingComputer
Unimicron is a public company manufacturing rigid and flexible PCBs, high-density interconnection (HDI) boards, and integrated circuit (IC) carriers.
The company is one of the largest PCB manufacturers in the world, with plants and service centers in Taiwan, China, Germany, and Japan. Its products are extensively used in LDC monitors, computers, peripherals, and smartphones.