# South Korean Financial Institutions Targeted by New Cyberattacks Major brokerages and crypto exchanges face data breaches amid rising regional security threats. - **Source:** [cybersecurity | TechCrunch](https://brifing.si/source/73fbb25c-5e90-44c9-9a24-7906dc3436cd) - **Published:** 2026-10-28 - **Topic:** [Software & Engineering](https://brifing.si/c/engineering) - **Original article:** - **On Brifing:** https://brifing.si/s/26da8742-49a5-4460-99e1-1545f348cf8d ## Financial Sector Under Siege South Korea's financial industry is grappling with a fresh wave of cyberattacks impacting major entities. Brokerages Daishin Securities and Mirae Asset Global Investments, alongside the crypto exchange Bithumb, have reported security incidents. These breaches follow a series of similar attacks in September, raising urgent concerns regarding the stability of the nation's financial infrastructure. ## Data Exposure at Daishin Daishin Securities confirmed a significant data breach affecting 38,490 customers. The compromised information includes names, email addresses, and mobile phone numbers. The firm is currently notifying affected individuals and cooperating with authorities to investigate the incident. They have committed to providing legal compensation for any losses resulting from this unauthorized data access. ## Uncertainty at Mirae and Bithumb Mirae Asset Global Investments and the crypto exchange Bithumb reported separate cybersecurity incidents this past Wednesday. Unlike the Daishin case, neither firm has confirmed whether customer data was exfiltrated during these specific breaches. Local media reports indicate that investigations are ongoing to determine the full extent of the impact on their internal systems. ## The AI Hacking Threat Security researchers previously linked September's attacks to a China-based hacker utilizing an AI penetration testing tool known as Artex. While officials are still investigating the root cause of these latest breaches, the reliance on AI-driven tools highlights a growing risk profile. These sophisticated methods allow attackers to exploit vulnerabilities with increased speed and precision. ## Regulatory Response in Seoul South Korea's Financial Services Commission has demanded stronger cybersecurity measures across the financial sector. Officials in Seoul announced plans to conduct comprehensive security checks on dozens of private sector IT systems. This regulatory push aims to address systemic weaknesses that have left government agencies and financial firms exposed to repeated, high-profile digital intrusions. ## Broader Regional Security Challenges The threat extends beyond South Korea, as Japan recently reported a cybersecurity incident involving GMO Internet. These regional events underscore persistent cybersecurity challenges across Asia, often attributed to years of inadequate infrastructure maintenance. While investigators have not established a direct link between the incidents in Japan and South Korea, the timing remains highly concerning. ## Corporate Silence and Accountability Key stakeholders, including the Financial Services Commission, Daishin Securities, Bithumb, and Mirae Asset Global Investments, have not yet responded to requests for comment. The lack of immediate transparency complicates the public understanding of these breaches. Stakeholders are now waiting for official reports to clarify whether these attacks share a common technical origin. ## Implications for Future Security The recurring nature of these attacks signals a critical shift in the threat landscape for Asian financial markets. As institutions transition toward more digital-first operations, the reliance on legacy systems creates significant exposure. Future resilience will depend on the effectiveness of the government's planned security audits and the industry's ability to modernize defenses. ## Sources covering this story - https://techcrunch.com/2026/10/28/south-koreas-financial-industry-hit-by-fresh-wave-of-cyberattacks/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._