Russia-Linked Hackers Attack Japan's Govt, Ports

Two Russian hacking groups leveled distributed denial-of-service (DDoS) attacks at Japanese logistics and shipbuilding firms — as well as government and political organizations — in what experts believe are attempts to pressure the Japanese government. The attacks came after lawmakers boosted the nation's defense budget, and its military conducted exercises with regional allies.

The two pro-Russian cyberthreat groups — NoName057(16) and the Russian Cyber Army Team — started attacking Japanese targets on Oct. 14, with more than half of the attacks targeting logistics, shipbuilding, and manufacturing firms, according to network-monitoring firm Netscout. The groups, especially NoName057(16), have made a name for themselves by attacking Ukrainian and European targets following Russia's invasion of Ukraine.

In the latest spate of attacks, the groups targeted Japanese industry and government agencies after the Ministry of Foreign Affairs of the Russian Federation expressed concern over the ramp-up of Japan's military, says Richard Hummel, director of threat intelligence for Netscout.

"Japan had their elections last week, and the leader that took over is no fan of Russia and, in fact, has been very vocal about supporting Ukraine and sending aid," he says. "Japan is also working with the US military on joint exercises and ballistics missiles testing — these are the [regional events] that NoName057 will go after."

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With geopolitical rivalries with China and Russia heating up, Japan is in the midst of its largest military buildup since World War II. In December 2022, the nation unveiled a five-year $320 billion plan that includes long-range cruise missiles that could hit targets in China, North Korea, and Russia. The move marked a significant shift away from Japan's self-defense-only policy, with the government continuing the move by increasing military spending by 16% this year.

On Oct. 17, Japan's Deputy Chief Cabinet Secretary Kazuhiko Aoki said the government is investigating the DDoS attacks.

More than half of the attacks targeted the logistics and manufacturing sector, while nearly a third targeted government agencies and political organizations in Japan, Netscout stated in its analysis.

The Russian group "has leveraged every attack capability of the DDoSia botnet, employing a wide range of direct-path attack vectors against multiple targets," the analysis stated. "As of this writing, approximately 40 targeted Japanese domains have been identified. On average, each domain is hit by three attack waves, utilizing four distinct DDoS attack vectors, utilizing approximately 30 different attack configurations to maximize attack impact."

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Hacktivists and the Resurgence of DDoS

The attacks mark the latest shift in DDoS attacks. In the past, 85% to 90% of such attacks originated in the gaming world, with players targeting other players, Netscout's Hummel says. Over the past few years, while many hacktivism attacks amounted to little more than PR stunts, cybercriminals have increasingly used DDoS attacks to cause outages in business operations to support a cause or monetize a botnet — sometimes, both.

US authorities recently charged two Sudanese brothers — 22-year-old Ahmed Salah Yousif Omer and 27-year-old Alaa Salah Yusuuf Omer — following more than 35,000 DDoS attacks during the past 18 months, which targeted government agencies, a major Los Angeles-area hospital, and technology companies. The US Department of Justice charged one of the two brothers with three counts of damage to a protected computer, and the indictment included his message taking credit for "any damage to the hospital ... and their health systems + any collateral damage," according to a federal indictment.

The impact of a DDoS attack on the ability of connected medical devices to operate means that increasingly they will have physical impacts, Hummel says.

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The brother was "charged with essentially attempted murder, because they were taking down hospital infrastructure where people needed life-saving technology," he says. "If the Internet goes down, then [these connected medical devices] stop functioning, they stop checking in."

Definitively Russian? Nyet

Both NoName057 and the Russian Cyber Army Team obviously pursue priorities expressed by the Russian government, but that does not necessarily mean they are a military or intelligence agency operation, Hummel says.

Overall, the groups have claimed 60 attacks against 19 different targets in the weeks following the criticism of Japan's accelerated military buildup by Russia's Minister of Foreign Affairs. In a Telegram post, NoName057(16) confirmed the link.

"Particular discontent was caused by the participation of non-regional NATO member countries in the maneuvers, which, in Russia's opinion, increases the threat and is unacceptable," they stated in the Telegram post (machine translated from Russian). "We punish Russophobic Japan and remind you that any measures directed against Russia may end badly."

The groups' attacks against Japan match with previous targeting against any critic of Russia or its strategy, Hummel says.

"I can't say definitively if they are part of the Russian government ... or if any agency is giving them direct instructions," he says. "What I can tell you is that all of the targeting is against groups that are anti-Russia or anti-Muslim. And oftentimes, it's usually going to be in that political sphere when people are vocal about their support of anybody against Russia."