"Hackers use 'cloud-on-cloud' attacks to evade detection, attribution"

Researchers at Skyhigh Networks have discovered attacks targeting Microsoft Office 365 accounts of senior employees within a wide range of Fortune 2000 companies. These attacks have been launched through the use of cloud infrastructure to perform extremely stealthy brute force attacks, which brings attention to the increasingly complex security challenges faced by companies in the adoption of cloud services. This article further discusses recent cloud-on-cloud attacks, how they were discovered by researchers, difficulties in identifying the perpetrators behind these attacks, and issues faced in the transition into the cloud. 

CyberScoop reports "Hackers use 'cloud-on-cloud' attacks to evade detection, attribution"