Cyber attack on major meat processor brings fear to people that prices could rise JBS processes almost a quarter of the nation's beef and almost 20% of the nation's pork. So when all of its plants closed following a cyber attack, some people are worried their prices may rise at their local grocery store. Posted: Jun 2, 2021 11:15 PM Posted By: Esteban Reynoso CHICO, Calif. - The world's largest meat processor, JBS, is still trying to get fully up and running again following the weekend cyber attack. Now, there is fear the price we all pay at the grocery store will go up.