• Wed. Dec 8th, 2021

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Ransomware attack on software manager hits 200 companies

A successful ransomware attack on a single company has spread to at least 200 organizations, according to cybersecurity firm Huntress Labs, making it one of the single largest criminal ransomware sprees in history.

The attack, first revealed Friday afternoon, is believed to be affiliated with the prolific ransomware gang REvil and perpetuated through Kaseya, an international company that remotely controls programs for companies that, in turn, manage internet services for businesses.

Kaseya announced Friday afternoon it was attacked by hackers and warned all its customers to immediately stop using its service. Nearly 40 of its customers were hacked, Kaseya said late Friday night.

Since those Kaseya customers manage hundreds or thousands of businesses, it is unclear how many will fall victim to ransomware over the weekend. But the number’s at least already around 200, said John Hammond, a senior security researcher at Huntress, which is helping with Kaseya’s response. That number expected to rise.

June 10, 202102:13

The timing, just ahead of Fourth of July weekend, is unlikely to be a coincidence. Ransomware hackers often time their attacks to start at the beginning of a holiday or weekend to minimize the number of cybersecurity professionals who might be able to quickly jump on and stop the malicious software’s spread.

Alex Dittemore, the founder of SoCal Computers, a small company that manages online services for about a dozen California businesses, said his company and all its clients were locked Friday with the ransomware. He keeps backups for all of them, he said, but hasn’t begun to restore their computers until Kaseya provides more guidance on when it was first infected with ransomware.

“One of the things that’s a little frustrating right now is that there’s not a lot of news coming down from Kaseya. We’re all in a holding pattern, just hanging tight,” he said.

“I’ve got 300, 400 people on Tuesday that are expecting to come back to work,” Dittemore said. “It would be nice if we could get some kind of decryption key or golden bullet.”

Computers at the local Teamsters 2010, a customer of Dittemore, were totally locked up, said that branch’s vice president, Mary Higgins. The national Teamsters were not affected, a spokesperson said.

The malicious software used to encrypt victims’ computers appears similar to the type normally used by REvil, a ransomware gang largely composed of Russian-speakers, multiple researchers have found. In the past, REvil has attempted “supply chain” compromises, where a hacker goes after a target that is connected to multiple organizations, in the hopes that one successful compromise will lead to many more.

The U.S. Cybersecurity and Infrastructure Security Agency announced Friday evening that it is “taking action to understand and address” the attack.

Eric Goldstein, CISA’s executive assistant director for cybersecurity, said his agency and the FBI have begun assessing the scenario.

“CISA is closely monitoring this situation and we are working with the FBI to gather information about its impact,” Goldstein said in an emailed statement.

“We encourage all who might be affected to employ the recommended mitigations and for users to follow Kaseya’s guidance,” he said.