If you are using Office 365 E5 plan (or if you have the Advanced Threats Protection) you can take advantage of a new capability to help you protect your data on Office 365 called Advanced Threats Tracker
This functionality is an advanced dashboard showing you all threats against your organization to help you assess the situation.
You can access it from the Security and Compliance portal within the Threat Management\Threat Tracker section
Threat Tracker Categories
- Noteworthy Campaigns are well known and important global threats. Office 365 Threat Intelligence pre-builds Noteworthy Campaign monitors, enabling admins to quickly review the impact of these threats and assessing both their volume and frequency. This automated monitoring allows admins speedy remediation from these threats.
- Trending Campaigns view provides dynamic assessments of email threats impacting your organization’s Office 365 environment. This shows tenant level malware trends, identifying malware families giving admins greater insight into which threats require further attention. New threats not seen recently in your organization will appear at the top of the page (sorted by trend). Admins can further investigate targeted and trending attacks in Explorer, where actions such as deleting or moving the malware to junk can be taken.