N Korea Cyber Threat More Aggressive Than China: US Firm

North Korean hackers are becoming more aggressive than their Chinese counterparts, a leading US cybersecurity firm warned today, as it identified a Pyongyang-linked group as an “advanced persistent threat”. It was the first time that FireEye had used the designation for a North Korean-based group. Analysts say the isolated and impoverished but nuclear-armed North has stepped up hacking operations partly to raise money for the cash-strapped regime, which is subject to multiple sanctions over its atomic weapons and ballistic missile programmes.

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North Korea has previously been blamed for the WannaCry ransomware that briefly wreaked havoc around the world last year — an accusation it angrily denies. FireEye said North Korean operatives had expanded their targets beyond South Korea and mounted increasingly sophisticated attacks, adding it had identified a suspected North Korean cyberespionage group it dubbed “APT37” — standing for “advanced persistent threat”. APT37 was “primarily based in North Korea”, it said, and its choice of targets “aligns with North Korean state interests”. “We assess with high confidence that this activity is carried out on behalf of the North Korean government,” it added.

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APT37 has been active at least since 2012, it said, previously focused on “government, military, defence industrial base and media sector” in the rival South before widening its range to include Japan, Vietnam and the Middle East last year, and industries ranging from chemicals to telecommunications. “This group should be taken seriously,” FireEye added. FireEye’s first APT was identified in a 2013 report by company division Mandiant, which said that hackers penetrating US newspapers, government agencies and companies “are based primarily in China and that the Chinese government is aware of them”.

One group, it said then, was believed to be a branch of the Peoples Liberation Army in Shanghai called Unit 61398. Five of its members were later indicted by US federal prosecutors on charges of stealing information from US firms, provoking a diplomatic row between Washington and Beijing. “We have seen both North Korean and Chinese operation’s range from simplistic to very technically sophisticated,” FireEyes director of intelligence analysis John Hultquist told AFP. “The sharpest difference between the two really lies in the aggressive nature of North Korean operations,” he added.

“Whereas Chinese actors have typically favoured quiet espionage, North Korea has demonstrated a willingness to carry out some very aggressive activity, ranging from attack to outright global crime.” But the WannaCry ransomware, he believes, was the work of a different North Korean group. “Thus far, we have only found APT37 doing the quiet espionage but they are a tool the regime can use aggressively.”

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• APT37
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