Cyberattacks Born in the Cloud Growing Rapidly, Researchers Say

Malicious hackers are increasingly stashing and launching malware attacks from inside the most popular public cloud-computing systems, including Microsoft Corp.’s Azure, Amazon Web Services and Google’s Drive, according to research by the cybersecurity firm Netskope Inc.

All malware is delivered from a source. Sometimes it comes from a hacker’s complex web of computers and servers, and other times it’s delivered from cloud networks.

Researchers at Netskope are reporting a dramatic spike in the volume of malware delivered from the cloud. In two years, the share of malicious software launched from the cloud increased to 71% from 46% ...