ULVAC Subsidiary Hit by Ransomware Attack in Early January ULVAC, a Japan-based vacuum technology and semiconductor equipment manufacturer, disclosed that its Korean subsidiary, Pure Surface Technology, suffered a ransomware attack on January 10. The incident encrypted internal servers and PCs, prompting the company to isolate the subsidiary’s network, engage external cybersecurity experts, and notify Korean authorities. ULVAC confirmed that the attack did not impact other group entities and stated that management is still assessing potential financial repercussions. The company has committed to providing further updates as part of its ongoing cyber risk management efforts across its international operations. Pure Surface Technology operates as part of ULVAC’s global electronics supply chain, specializing in semiconductor production equipment and related services. The incident highlights the persistent cybersecurity threats facing industrial and technology firms in the sector.