Symantec - Internet Security Threat Report. Vol. 22, April 2017, 77 pages.
"The Symantec Global Intelligence Network
tracks over 700,000 global adversaries and records
events from 98 million attack sensors worldwide.
This network monitors threat activities in over 157
countries and territories through a combination
of Symantec products, technologies, and services,
including Symantec Endpoint Protection™, Symantec
DeepSight™ Intelligence, Symantec Managed
Security Services™, Norton™ consumer products,
and other third-party data sources, generating
more than nine trillion rows of security data... " Download the report.