A spokesperson said only that the key came from a "trusted third party" and the company would share it with all victims.
The extortionist claimed a terabyte of Saudi Aramco data had been hacked, with an offer for the data to be deleted posted on the dark web.
"The United States has long been concerned about the People's Republic of China's irresponsible and destabilizing behavior in cyberspace," the White House said.
Russian-linked hacking group REvil disappeared online on Tuesday after conducting a major ransomware attack July 2.
"It used to be that you had to be very technically adept to be a hacker, but the way the cyber market or cyber underground has evolved is a lot of those things have become services now," a U.S. military cyberwarfare officer told Newsweek.
America's rising crime rate and the future of policing are subjects of political debate, while police agencies across the nation face cyber threats.
White House Press Secretary Jen Psaki said that the Biden administration "will determine attribution and make a decision accordingly."
"Our team worked with Microsoft to conduct a review of our systems and after a thorough investigation, no RNC data was accessed," said RNC Chief of Staff Richard Walters.
"There is no way the numbers are as low as Kaseya is claiming," said Jake Williams, chief technical officer of a cybersecurity firm.
"Remember when President Biden gave Putin a list of things that were supposed to be off-limits for cyber attacks?" McCarthy wrote in his post. "What he SHOULD have said is that ALL American targets are off-limits."
"There's zero doubt in my mind that the timing here was intentional," cybersecurity researcher Jake Williams said.
"The dimension of cyber enables countries to operate and send a strong signal, but in a much more controlled way," Cybereason CEO Lior Div told Newsweek.
"It's almost like 'Minority Report,'" a U.S.military intelligence official told Newsweek, "where you can find a path of likely outcomes to build a reasonable conclusion, but unless a crime has been committed, it isn't a crime."
Americans now have more choices than ever before when it comes to upgrading their homes with the latest smart technology. However, recent security breaches across the nation have cybersecurity experts asking which products are worth the risk.
"It is the position of the U.S. government that we strongly discourage the payment of ransoms," said Eric Goldstein, a top cybersecurity official in the Department of Homeland Security.
The study by a cybersecurity company found that 80 percent of businesses that paid after a ransomware attack suffered a second attack.
"It's a moment of reckoning for our industry," Vasu Jakkal, Corporate Vice President for Microsoft Security, said. "(Solar Winds) was one of the most complex attacks we've seen, and that continues."
The CEO said that the company paid the ransom to prevent any negative impacts on restaurants, grocery stores and farmers.
"That's an unknown we probably don't want to know. And it's an unknown we probably don't want to play out in a public forum," Colonial Pipeline CEO Joseph Blount said about the attack.
"Today, we turned the tables on DarkSide," Deputy Attorney General Lisa Monaco said.
"One certainty is crypto will continue to positively impact business more than the SEC," the billionaire entrepreneur tweeted.
"The White House is engaging directly with the Russian government on this matter and delivering the message that responsible states do not harbor ransomware criminals," Principal Deputy White House Press Secretary Karine Jean-Pierre said on Tuesday.
"We can live in a world with cryptocurrency or a world without ransomware, but we can't have both," said Lee Reiners, executive director of the Global Financial Markets Center at Duke University's Law School in Durham, North Carolina. "It is time for the adults to tell the children: Party's over."
Colonial Pipeline CEO Joseph Blount believes paying the ransom was "the right thing to do for the country" as the amount of damage was unknown to a system responsible for the majority of the East Coast's gas.
While some hospital officials were told it was a ransomware attack, the country's Ministry of Health described it as an "attempted cyber incident."
Ransomware attacks are "lucrative" and "easy" for the groups behind them, one cyber security expert told Newsweek.
A Russian-speaking ransomware syndicate that stole data from the Washington, D.C., police department said it rejected an initial offer of a $100,000 payment and that if more money is not offered, it will release sensitive information that could put lives at risk.
The Colonial Pipeline being forced to close has also resulted in widespread fuel shortages, particularly at stations along the East Coast.
The FBI accused the group of being responsible for the shutdown of a major U.S. oil pipeline last week.