Specifically, Time's sources claim that an investigation discovered a county-level election database where voter data had been manipulated. Those alterations were discovered and fixed but Time doesn't say when that investigation took place. In this case, it's not clear whether the hackers were Russian agents.
As for the data that was stolen, the state of Illinois had almost 90,000 records stolen by Russia -- more than 90 percent of which contained driver's license numbers. About 25 percent of that 90,000 also contained the last four digits of people's social security numbers. Sources have also said that an ongoing investigation is looking into whether any of this data made its way back to the Trump campaign.
This news follows a report claiming that hackers attacked voting databases in 39 states. That reported stated that hackers had tried to alter and delete data in Illinois' voter database -- it appears that attempt wasn't successful, but hackers were able to make off with some data.
The US continues to state that none of the attacks directly affected election vote counts. "It is true there is no evidence that the tampering with voter machines or tampering with voter registrations or any of like that affected the counting of the votes," Congressman Adam Schiff (D-CA), who serves on the House Intelligence committee, said back in January. "That's not the same thing as saying there was no impact on the outcome [of elections]."
Meanwhile, Special Counsel Robert Mueller continues to investigate if any laws were broken relating to the hacking attacks last fall. Regardless of what he finds, there's no doubt that security relating to the 2018 mid-term elections will be a major focus over the next year -- and that'll be doubly true for 2020's presidential election.