Rakuten Securities, SBI Securities and others: accounts were taken over with phishing-stolen credentials, and holdings were sold to buy Chinese stocks
Intruders used stolen logins to sell holdings and buy Chinese and other stocks. In 2025 there were 9,752 unauthorized trades worth about 739.3 billion yen.
Disclosed
2025-03-25
Organizations involved
6
Leaked or at risk
Unknown
Downtime
Unknown
What happened
Rakuten Securities announced that login IDs, passwords and trading PINs had been taken through phishing, spyware or malware and used for unauthorized trades. It temporarily stopped buy orders for 582 Chinese (Hong Kong) stocks that may have been involved. [1]
The Financial Services Agency warned of unauthorized access and trades using information stolen through fake securities company sites and similar means. [2]
The Financial Services Agency's tally from February to April 16 showed unauthorized trades at six firms: Rakuten Securities, SBI Securities, Nomura Securities, Monex, SMBC Nikko Securities and Matsui Securities. It counted 3,312 unauthorized accesses and 1,454 unauthorized trades, with about 50.6 billion yen sold and 44.8 billion yen bought. [3]
The Japan Securities Dealers Association announced that 10 major and online securities firms had agreed to compensate customers for damage to a certain extent. [4]
The Financial Services Agency's summary showed 17,559 unauthorized accesses and 9,752 unauthorized trades in 2025, worth about 739.3 billion yen. [5]
Impact
In most cases, holdings in the account were sold and the proceeds used to buy small-cap stocks such as Chinese stocks. There were no cases of money being withdrawn to a third party. The Financial Services Agency said the damage was not limited to particular firms and could happen at any securities company. [2] [3]
Timeline
- Detected, Disclosed 2025-03-25
- 1 days
Attack or cause
- Method
- [Phishing][Credential abuse][Malware]
- Impact
- [Fraud][Financial loss]
- Entry point
- Stolen credentials
Data exposed or at risk
Organizations involved
[Breached][Critical]Tokyo, ChuoReal estate and rental
Nomura Securities Co., Ltd.[Breached][Critical]Tokyo, MinatoFinance and insurance
SBI SECURITIES Co., Ltd.[Breached][Critical]Tokyo, ChiyodaFinance and insurance
Matsui Securities Co., Ltd.[Breached][Critical]Tokyo, MinatoFinance and insurance
Monex, Inc.[Breached][Critical]Tokyo, MinatoFinance and insurance
Rakuten Securities, Inc.[Breached][Critical]Tokyo, ChiyodaFinance and insurance
SMBC Nikko Securities Inc.
Sources
- [1][Official]フィッシング詐欺などによる不正取引発生を受けた当社の取り組みとセキュリティ強化のお願いRakuten Securities, Inc. · 2025-03-25
- [2][Official]インターネット取引サービスへの不正アクセス・不正取引にご注意くださいFinancial Services Agency · 2025-04-03
- [3][News]証券口座の乗っ取り、勝手に株売却し中国株など購入…2か月半で不正取引1454件The Yomiuri Shimbun · 2025-04-18
- [4][Official]フィッシング詐欺等による証券口座への不正アクセス等による対応についてJapan Securities Dealers Association · 2025-05-02
- [5][News]証券不正取引、計7393億円 昨年の口座乗っ取り被害―金融庁Jiji Press · 2026-01-14