REUTERS/Kacper Pempel/Illustration/File Photo Acquire Licensing RightsCompanies Hss Otomotiv Ve Lastik Sanayi Anonim Sirketi FollowTOKYO, Sept 28 (Reuters) - U.S. National Security Agency, Federal Bureau of Investigation and Japanese police jointly warned multinational companies of China-linked hacker group BlackTech in a cybersecurity advisory late on Wednesday. "BlackTech has demonstrated capabilities in modifying router firmware without detection and exploiting routers’ domain-trust relationships to pivot from international subsidiaries to headquarters in Japan and the United States, which are the primary targets," the statement said. BlackTech has been engaging in cyberattacks on governments and tech-sector companies in the United States and East Asia since around 2010, Japan's National Police Agency said in a separate statement. Amid heightening U.S.-China tensions over issues including Taiwan, U.S. security officials are raising the tone of their warnings against China's cyberattack capabilities. FBI chief Chris Wray earlier this month said China "has a bigger hacking program than every other major nation combined".

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Persons: Kacper, BlackTech, cyberattacks, Chris Wray, Kantaro Komiya, Michael Perry Organizations: REUTERS, . National Security Agency, Federal Bureau of Investigation, Cybersecurity, Infrastructure Security Agency, Japan's National Police Agency, Chinese Communist Party, U.S, FBI, United Kingdom, Washington Post, Pentagon, Thomson Locations: TOKYO, China, Japan, United States, East Asia, Blacktech, Taiwan, U.S, Australia, Canada, New Zealand, United, South Korea