Microsoft Disrupts Cybercrime Network Behind 1 Billion Phishing Emails Targeting Japan
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- ITmedia.co.jp
On October 14, 2026, Microsoft announced the dismantling of a cybercrime network responsible for sending over 1 billion phishing emails and SMS messages to organizations in Japan, the United States, and other countries. This operation, which targeted sectors such as healthcare and finance, was particularly impactful in Japan, which, alongside the U.S., was one of the most affected nations.
The significance of this disruption lies in the low-cost, high-volume phishing attacks that were made possible through a sophisticated underground marketplace known as YAM Store. This platform allowed cybercriminals to buy and sell compromised cloud environments and phishing kits, enabling even less technically skilled attackers to engage in large-scale phishing campaigns.
Looking ahead, Microsoft emphasizes the need for organizations to adopt robust security measures, including user education and enhanced authentication methods, to mitigate the risks posed by such cyber threats. No further timeline was disclosed at the time of publication.
Original report
[ITmedia エンタープライズ] 日本も標的、10億通のフィッシング 量産を支えた「見えない商流」
ITmedia.co.jpThis briefing is an independently written summary based on publicly available reporting and is provided for industry information and news discovery. The original report and source publication are credited and linked where applicable. RobotToday does not claim ownership of third-party source material.
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