I have been in network security for nearly a decade, never have these been this many events in one single year (or perhaps the reporting of the events seems more ubiquitous):
Suspected attribution: China
Target sectors: Multiple, including government, international financial organization, and aerospace and defense organizations, as well as high tech, construction and engineering, telecommunications, media, and insurance.
Overview: APT31 is a China-nexus cyber espionage actor focused on obtaining information that can provide the Chinese government and state-owned enterprises with political, economic, and military advantages.
Associated malware: SOGU, LUCKYBIRD, SLOWGYRO, DUCKFAT
Attack vectors: APT31 has exploited vulnerabilities in applications such as Java and Adobe Flash to compromise victim environments.