Businesses around the world scrambled on Saturday to prepare for a renewed cyber attack, convinced that a lull in a computer offensive that has stopped car factories, hospitals, schools and other organizations in around 100 countries was only temporary. The pace of the attack by a destructive virus dubbed WannaCry slowed late on Friday, after the so-called “ransomware” locked up more than 100,000 computers, demanding owners pay to $300 to $600 get their data back.