Source: Japan Times
The Defense Ministry and Self-Defense Forces were targeted by a sophisticated cyberattack in September that may have compromised the Defense Information Infrastructure, Japan’s internal military network, ministry sources say.
The attacker, possibly a state actor, initially penetrated the Ground Self-Defense Force’s computer system and likely stole some information, though the full scope of the theft remains unclear, the sources said Sunday.
The attacker took advantage of a security loophole, prompting the ministry to raise its cybersecurity alert level.
Most officials were mum on the attack, but a senior SDF official called it “a very serious situation.”
“We must quickly take measures to prevent a recurrence,” the official said.
At a news conference Monday, Deputy Chief Cabinet Secretary Koichi Hagiuda refused to discuss the matter, saying that doing so might give the hackers a better idea of government security measures.