 JBS, the worlds largest meat processing company, has become the latest major firm to fall victim to a ransomware attack, bringing some production to a halt, the company said on Monday. The Brazil-based meatpackers US operations are headquartered in Greeley, Colorado, and control an estimated one-fifth of the countrys slaughtering capacity for beef and pork. The company employs more than 64,000 workers in the US, many of whom are reporting cancelled shifts during the stoppage. 