Executive Summary
The United States National Security Agency (NSA), the U.S. Federal Bureau of Investigation (FBI), the U.S. Cybersecurity and Infrastructure Security Agency (CISA), the Japan National Police Agency (NPA), and the Japan National Center of Incident Readiness and Strategy for Cybersecurity (NISC) (hereafter referred to as the “authoring agencies”) are releasing this joint cybersecurity advisory (CSA) to detail activity of the People’s Republic of China (PRC)-linked cyber actors known as BlackTech. BlackTech has demonstrated capabilities in modifying router firmware without detection and exploiting routers’ domain-trust relationships for pivoting from international subsidiaries to headquarters in Japan and the U.S. — the primary targets. The authoring agencies recommend implementing the mitigations described to detect this activity and protect devices from the backdoors the BlackTech actors are leaving behind.
BlackTech (a.k.a. Palmerworm, Temp.Overboard, Circuit Panda, and Radio Panda) actors have targeted government, industrial, technology, media, electronics, and telecommunication sectors, including entities that support the militaries of the U.S. and Japan. BlackTech actors use custom malware, dual-use tools, and living off the land tactics, such as disabling logging on routers, to conceal their operations. This CSA details BlackTech’s tactics, techniques, and procedures (TTPs), which highlights the need for multinational corporations to review all subsidiary connections, verify access, and consider implementing Zero Trust models to limit the extent of a potential BlackTech compromise.
For more information on the risks posed by this deep level of unauthorized access, see the CSA People’s Republic of China State-Sponsored Cyber Actors Exploit Network Providers and Devices.[1]
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