Key facts
- Japan's Ground Self-Defense Force used USB drives infected with a virus linked to Chinese hackers.
- The infected USB drives were used on classified computers.
- The breach occurred over a period of nearly a year.
- The incident was revealed by a Nikkei investigation.
- Japan is now sharing cyber threat intelligence with NATO.
Japan's Ground Self-Defense Force (GSDF) utilized USB drives infected with a virus connected to Chinese hackers on classified computers for approximately one year. This significant security lapse went undisclosed until a Nikkei investigation brought it to light. The infected USB drives were reportedly used on sensitive systems within the GSDF. In the wake of this breach, Japan is now sharing cyber threat intelligence with NATO. The incident highlights ongoing concerns regarding state-sponsored cyberattacks and the vulnerability of critical infrastructure to such threats. The duration of the undetected compromise suggests a sophisticated intrusion or a failure in internal security protocols. Further details regarding the specific nature of the classified information accessed or the extent of the damage remain unclear, but the use of infected media on classified systems represents a serious breach of security protocols. The sharing of intelligence with NATO indicates a broader effort to bolster international cybersecurity defenses against persistent threats.