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Chinese AI Tool Behind Cyberattacks in Japan: Security Firm

Eight Japanese firms disclosed leaks as investigators said the autonomous tool could diagnose vulnerabilities and automate intrusions.

  • On Tuesday, Oct 20, the information security subsidiary of GMO Internet Group reported that a China-linked AI agent, Artex, was used in recent cyberattacks targeting Japanese companies across multiple industries.
  • Originally designed to strengthen cyber defenses through AI-powered security testing, Artex was misused by 'bad actors,' prompting the developer to stop source code access this month.
  • GMO investigators discovered six attacking devices targeting Japanese firms, while eight companies disclosed leaked or possibly leaked data in September and October, potentially impacting millions of customers.
  • Cybersecurity Minister Toshiharu Furukawa stated on Tuesday that the government is analyzing potential malicious AI use, while GMO shared its findings with law enforcement to prevent further damage.
  • The head of the ruling party's cybersecurity committee declared this month that a 'state of emergency' has been reached over emerging threats, as AI's hacking capabilities gain global attention.
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NHK reported on the 20th that Artex (ARTEX), a Chinese artificial intelligence (AI) tool recently used in a chain hack in the Korean financial sector, has also been used in cyber attacks against Japanese companies. According to an analysis of the information security subsidiary of Japanese IT company GMO Internet Group, Artex has recently been used to hack Japanese companies and organizations. As a result of the investigation carried out by this…

[Yomiuri Shimbun] In the case of the massive data leaks of personal information caused by cyberattacks on domestic companies and organizations, it was reported on the 19th by Japan's Sekisui Co., Ltd. that a Chinese-language AI (artificial intelligence) agent used to diagnose system vulnerabilities appears to have been misused in some of the attacks.

·Japan
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読売新聞オンライン broke the news in Japan on Monday, October 19, 2026.
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