Ukraine cyberattacks: What you need to know

24 Feb 2022

Image: © Oleksii/

Ukraine has been hit by a wave of cyberattacks, while the UK and US have a found new malware linked to Russia’s Sandworm group.

As the world watches a full-scale invasion of Ukraine by Russian forces, there have also been reports of various cyberattacks hitting Ukrainian computers and websites over the past two days, likely a form of hybrid warfare by Russia.

Multiple sources have said that Ukraine was the victim of a wave of cyberattacks yesterday (23 February), including targeted distributed denial-of-service (DDOS) attacks on Ukrainian government websites and a new malware found on hundreds of computers.

DDOS attacks are when hackers attempt to disrupt the normal traffic of a targeted server by overwhelming it with requests. This tactic is known to have been used by Russia in the past as part of hybrid warfare tactics during incursions in Georgia in 2008 and Crimea in 2014.

Internet monitor NetBlocks tweeted yesterday that Ukrainian government websites such as those of the ministries of foreign affairs, defence and internal affairs, as well as those of the country’s security service and cabinet of ministers have “been impacted by network disruptions”.

Later in the day, Ukraine’s minister of digital transformation Mykhailo Fedorov said that another series of DDOS attacks hit the country targeting banks and the parliament, according to Reuters.

These incidents come following cyberattacks on Ukraine last month, when messages such as ‘be afraid and prepare for the worst’ were displayed on hacked government websites.

Even though some Ukrainian websites have seen a swifter recovery this time around, likely due to increased preparedness, the cyberattack incident “is ongoing, with latency and outages continuing at the security service”, a researcher told BBC News.

‘HermeticWiper’ malware

While websites were still dealing with the DDOS attacks, cybersecurity company ESET reported that a new data wiper malware was detected in Ukraine last night, which it found to be “installed on hundreds of machines in the country”.

In a Twitter thread, ESET’s research team said that based on the timestamp on one sample of the malware, the attacks might have been in preparation for almost two months. It named the malware HermeticWiper based on the name of the Cypriot company its certificate was found to be issued to, Hermetica Digital.

Brian Kime, vice-president at cybersecurity firm ZeroFox, told Reuters that the certification might have been designed to help the malware dodge antivirus protections, adding that faking or stealing such a certificate isn’t impossible but a sign of a “sophisticated and targeted” operator.

Cyclops Blink

Meanwhile a joint report by intelligence agencies in the UK and US claims that a new malware dubbed Cyclops Blink, believed to built by Russian hacker group Sandworm, has replaced the earlier VPNFilter malware that infected more than 500,000 routers in 2018.

The report found that the Sandworm group, also known as Voodoo Bear, has replaced the exposed VPNFilter malware with a new, more advanced framework. Sandworm is believed to be affiliated with Russia’s GRU and its main centre for special technologies.

The report was published yesterday by the UK National Cyber Security Centre (NCSC), the US Cybersecurity and Infrastructure Security Agency, the US National Security Agency and the Federal Bureau of Investigation.

The groups said that the malware, which has been circulating for at least three years, is “sophisticated and modular with basic core functionality to beacon device information back to a server and enable files to be downloaded and executed”.

“There is also functionality to add new modules while the malware is running, which allows Sandworm to implement additional capability as required,” they wrote.

Network device manufacturer WatchGuard said on its website yesterday that Cyclops Blink, which is able to abuse a legitimate firmware update mechanism in infected devices and survive reboots, has infected about 1pc of the company’s network firewall devices.

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Vish Gain is a journalist with Silicon Republic