A three-day cybersecurity wargame began today in Tokyo in preparation for the upcoming Olympic Summer Games.

This particular exercise has 140 workers from 58 critical infrastructure firms defend against malware attacks that attempt to disrupt devices used for telecommuting, according to the Nippon News agency. During the Olympics many workers will telecommute to avoid traffic congestion.

The scenario has a computer that was taken from an office environment where it was hit with malware to a home being where the malware activates. The target computer is then injected with a second type of malware that resides on the computer until it is returned to the office at which time it activates and spreads to other systems enabling the malicious actors to exfiltrate vital information.

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