Unpatched SharePoint servers opened the door to multiple attackers, Microsoft finds

What began as a routine ransomware investigation uncovered two unrelated attackers operating inside the same victim network at the same time, each obscuring the other’s activity and complicating the response. The discovery emerged during a Microsoft Detection and Response Team (DART) engagement involving Storm-2603, a threat actor associated with ransomware deployment. Investigators initially believed they were tracking a single intrusion before identifying a separate attack chain involving a di