[Qilin Ransomware Attacks South Korean IT Service Provider, Data from 28 Financial Institutions Leaked] The Qilin ransomware group launched a supply chain attack by breaching South Korean IT service provider GJTec, resulting in 28 financial institutions being affected and the leakage of over 1 million files, totaling approximately 2TB of data. Bitdefender's investigation indicates that this operation is suspected to be linked to the North Korea-backed APT group 'Moonstone Sleet' and may involve collaboration with the Russian-speaking Qilin organization, targeting the South Korean financial market.