Voice phishing cases detected by major banks double in 2025

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SEOUL, Oct. 18 (Yonhap) -- The number of voice phishing transactions confirmed as fraud after being flagged by monitoring systems at major commercial banks doubled last year from a year earlier, data showed Sunday.

According to the data submitted by the Financial Supervisory Service to Rep. Park Seong-hoon of the People Power Party, the five major banks -- KB Kookmin Bank, Shinhan Bank, Hana Bank, Woori Bank and NH Nonghyup Bank -- detected 8,760 such transactions through their fraud detection systems (FDS) in 2025 and subsequently confirmed them as actual fraud after taking temporary measures to suspend them.

The figure more than doubled from 4,343 cases in 2024.

An FDS is a technical system that monitors transactions, user activity and other data in real time to identify and flag suspicious behavior.

The banks' FDS flagged 1.11 million suspected voice phishing transactions last year, up 39.9 percent from 796,000 in 2024.

Of those, the banks took temporary measures against 157,000 transactions in 2025, up from 125,000 in 2024.

Recently, South Korean financial institutions are stepping up efforts to strengthen their cybersecurity measures as a series of cyberattacks have exposed the personal information of about 100,000 people across the industry, including email addresses, names and phone numbers.

This undated file photo shows automated teller machines of major commercial banks in South Korea in Seoul. (Yonhap)

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Voice phishing cases detected by major banks double in 2025

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首尔，10 月 18 日（韩联社）——周日公布的数据显示，去年主要商业银行的监控系统标记出的语音钓鱼交易被确认为欺诈交易的数量比上年翻了一番。

根据金融监督院提交给国民力量党议员朴成勋的数据，2025年，五大银行——KB国民银行、新韩银行、韩亚银行、友利银行和NH农协银行——通过其欺诈检测系统（FDS）检测到8760笔此类交易，并在采取临时措施暂停这些交易后，确认这些交易为实际欺诈。

到 2024 年，这一数字将比 4,343 例翻一番还多。

FDS 是一种技术系统，它实时监控交易、用户活动和其他数据，以识别和标记可疑行为。

去年，各银行的金融数据系统 (FDS) 标记了 111 万笔可疑的语音网络钓鱼交易，比 2024 年的 79.6 万笔增加了 39.9%。

其中，银行在 2025 年对 157,000 笔交易采取了临时措施，高于 2024 年的 125,000 笔。

最近，一系列网络攻击导致韩国金融机构约 10 万人的个人信息泄露，包括电子邮件地址、姓名和电话号码，因此韩国金融机构正在加大力度加强网络安全措施。

这张未注明日期的资料照片显示的是韩国首尔主要商业银行的自动取款机。（韩联社）

消息人士称，在发生多起与人工智能相关的黑客攻击事件后，银行正在考虑增加网络安全支出。

（导语）监管机构称，近期针对韩国金融机构的黑客攻击背后有28个IP地址

（导语）李呼吁对金融机构的个人数据泄露事件进行彻底调查

到2025年，主要银行检测到的语音网络钓鱼案件数量将翻一番。