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Mirae Asset Securities said Saturday that cyberattacks leaked account numbers of about 3,800 customers and personal information of over 35,000 current and former employees and contractors, Yonhap reports. The Kyunghyang Shinmun adds that the attacks hit the mobile-web phone authentication login service and the 'mi-global' groupware system on Nov. 4-5, exposing account numbers for 3,800 customers and personal data of 35,255 employees including retirees and outsourced workers. The incidents come as 37 domestic financial firms have been hit by cyberattacks in the past month, exposing about 473,000 records and 1 billion won stolen, Business Korea reports.