The company, which distributes medicines and medical devices to hospitals and healthcare practices across the U.S., said it was hacked and expects intermittent service degradation.
The arrests come after a wave of cyberattacks earlier this year targeting tech companies that rely on high-profile and widely used open source software.
The Justice Department said that the domain seizures made the botnet and its command and control servers "inoperable," as the domains were hardcoded into the botnet's code and were critical for the botnet's communication and essential operations.