Case Study: Phishing Attack Creates Public Links to Private Files

Scenario
An email Phishing attack resulted in unauthorized access to the victim’s email mailbox and the creation of public-sharing links to private Microsoft OneDrive files.
Background
In early 2019, an AIS Managed SIEM Alert indicated that a Customer email mailbox was accessed from the United States and from Russia less than an hour later, triggering an Impossible Travel Alert. Minutes later, an additional…