Advantest Hit by Ransomware Attack

On February 19, Advantest Corporation, a Japanese technology company and prominent manufacturer of testing equipment for the semiconductor industry, detected "unusual activity" within its IT environment, leading to the immediate deployment of incident response protocols. The company has over 7,500 employees worldwide, with offices in locations including Munich, Germany, and San Jose, California. As of February 23, a data breach has not been confirmed, but Advantest is dedicated to transparency and will provide regular updates about the ongoing investigation. The attack appears to be a ransomware operation, similar to one that hit Japanese brewer Asahi in 2025, which resulted in production halts and retailer shortages. Cybercriminals have claimed responsibility for the Advantest ransomware attack, but details on how it works remain unclear.