Stryker shares rose by 2% after the cyberattack, with most of the company's sites and critical lines restored. The company found that remote devices running Microsoft's Windows operating system had been affected by the attack. Stryker, which has 56,000 employees and operates in 61 countries, is working to restore its electronic ordering systems and product deliveries. It is working with external cybersecurity experts to seize domains linked to the hackers.