Financial Supervisory Service: "33 IP Addresses Identified in Hacking Attempts So Far"
28 Distinct IPs Identified After Removing Duplicates
Possible Use of Multiple Country IPs... Caution Needed in Interpretation
As of October 6, 2026, the Financial Supervisory Service announced that it has identified 33 internet protocol (IP) addresses used in hacking attacks targeting the entire financial sector.
On this day, the Financial Supervisory Service stated, "So far, a total of 33 IP addresses have been confirmed as being used in recent hacking attempts related to security incidents in the financial sector. After removing duplicates, information on 28 addresses, along with certain country information, has been distributed."
The Financial Supervisory Service and the Financial Security Institute are currently sharing details of the IP addresses used in attempted hacks, information about security vulnerabilities, and other relevant data with the entire financial sector in response to recent hacking incidents. There is a growing possibility that hackers may have used IP addresses from multiple countries as a means to evade tracking.
However, authorities noted that for some IP addresses, it is not possible to identify the country, and even if the country is identified, there could be routing via other nations, so these factors should be interpreted with caution.
Previously, on October 1, the financial authorities shared five attack IPs and related security precautions used in recent hacks with approximately 500 financial companies. Banks and credit card companies are required to complete emergency checks by October 6, while securities firms, insurance companies, savings banks, and electronic financial service providers must complete theirs by October 8.
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The inspection covers 12 items, including whether access from the attack IPs is blocked, whether there have been any intrusion attempts or damage through these IPs, and whether IT assets and services exposed to external threats have been identified and fortified with enhanced security.
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