STAC5143 and STAC5777: New Ransomware Campaigns Target Microsoft Office 365 Users Cyber Security STAC5143 and STAC5777: New Ransomware Campaigns Target Microsoft Office 365 Users Ddos January 23, 2025 Read More Read more about STAC5143 and STAC5777: New Ransomware Campaigns Target Microsoft Office 365 Users