Researchers from FireEye noticed a dramatic increase in phishing attacks in the first quarter of 2019. OneDrive’s popularity rose from almost complete disregard to a share above 60%. FireEye’s report observes an increase in using domains with digital certificates. BEC (BEC) scams are still the cash cow for cybercriminals as this type of attack appears as normal traffic and can bypass regular email protections. Companies should consider training and set up protocols for situations where sensitive information needs to be altered.
Source: https://www.bleepingcomputer.com/news/security/microsoft-onedrive-has-60-percent-jump-in-hosting-of-malicious-files/