Kaspersky Lab found Calisto malware, a Precursor to Dangerous Proton macOS Malware Malware Kaspersky Lab found Calisto malware, a Precursor to Dangerous Proton macOS Malware Ddos July 22, 2018 Read More Read more about Kaspersky Lab found Calisto malware, a Precursor to Dangerous Proton macOS Malware