Bithumb probes internal system breach as firms report intrusions

Bithumb said it had detected unauthorized access to its internal mobile system and was investigating whether member information was exposed, as two other South Korean financial firms reported cyber incidents. The exchange said the work system is separate from its virtual-asset trading system, so customer assets could not be accessed through the breach. Bithumb said the system is used internally by employees. The exchange was investigating the scope of the intrusion, including whether member data had been affected. Its report of the breach and inquiry was relayed through Yonhap News Agency; the supplied accounts do not establish the final findings of that investigation. Daishin Securities said personal and financial information belonging to 38,490 customers had been exposed after unauthorized access to a server linked to its online account-opening service. The company said it detected suspicious activity on Oct. 17 and examined more than 60,000 requests disguised as legitimate service traffic over 10 days. Daishin said the exposed information included names, email and physical addresses, bank names and account numbers, along with encrypted phone numbers and account details. The...