Ukrainian DDoS Attacks Should Put US on Notice–Researchers

On Tuesday, institutions central to Ukraine’s military and economy were hit with denial-of-service (DoS) attacks. Impact was limited, but the ramifications are not.

On Tuesday, institutions central to Ukraine’s military and economy were hit with a wave of denial-of-service (DoS) attacks, which sparked an avalanche of headlines around the world. The strike itself had limited impact — but the larger implications for critical infrastructure beyond the Ukraine are worth noting, researchers said.

The targets were core entities to Ukraine: the Armed Forces of Ukraine, the Ministry of Defense, Oschadbank (the State Savings Bank) and Privatbank, the country’s largest commercial bank, servicing nearly 20 million customers. Oschadbank and Privatbank are considered “systemically important” to Ukraine’s financial markets.

Adam Meyers, senior vice president of intelligence at CrowdStrike, said via email that the attacks consisted of “a large volume of traffic, three orders of magnitude more than regularly observed traffic, with 99 percent of this traffic consisting of HTTPs requests.”

What Happened?

By overloading targeted servers, this kind of DoS attack ensured that end users couldn’t access their websites, bank accounts and so on for a period of time. As Ukraine’s Center for Strategic Communications noted in a Facebook

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