The world’s largest meat processing company is getting back online after production around the world was disrupted by a cyberattack just weeks after a similar incident shut down a U.S. oil pipeline.

Brazil’s JBS SA said late Tuesday that it had made “significant progress” in dealing with the cyberattack and expected the “vast majority” of its plants to be operating on Wednesday.

“Our systems are coming back online and we are not sparing any resources to fight this threat,” Andre Nogueira, CEO of JBS USA, said in a statement.

Earlier, the White House said JBS had notified the U.S. of a ransom demand from a criminal organization likely based in Russia. White House principal deputy press secretary Karine Jean-Pierre said the White House and the Department of Agriculture have been in touch with the company several times this week.

Read more: AP News