STAC5143 and STAC5777: New Ransomware Campaigns Target Microsoft Office 365 Users Cyber Security STAC5143 and STAC5777: New Ransomware Campaigns Target Microsoft Office 365 Users Do Son January 23, 2025 0 Sophos X-Ops has uncovered two distinct ransomware campaigns to infiltrate organizations via Microsoft Office 365 and Teams.... Read More Read more about STAC5143 and STAC5777: New Ransomware Campaigns Target Microsoft Office 365 Users