Ransomware Attack Before Holiday Leaves Companies Scrambling

At least 200 U.S. businesses were hit, according to a cybersecurity firm that believes Russians are behind the attack.

Businesses around the world rushed Saturday to contain a ransomware attack that has paralyzed their computer networks, a situation complicated in the U.S. by offices lightly staffed at the start of the Fourth of July holiday weekend. It’s not yet known how many organizations have been hit by demands that they pay a ransom in order to get their systems working again. But some cybersecurity researchers predict the attack targeting customers of software supplier Kaseya could be one of the broadest ransomware attacks on record — even after a scourge of headline-grabbing attacks over recent months. “The number of victims here is already over a thousand and will likely reach into the tens of thousands,” said cybersecurity expert Dmitri Alperovitch of the Silverado Policy Accelerator think tank. “No other ransomware campaign comes even close in terms of impact.”