RedSun Exploit - Cloud Files Sync Root Provider Registration

Ibrahim Saud@tektrix

•updated Jun 23, 2026•2•0•12

Detects the registration of a Cloud Files sync root provider with the name 'SERIOUSLYMSFT', a hardcoded value used by the RedSun exploit (CVE-2026-41091). This activity indicates an attempt to establish persistence or execute malicious code by abusing the Windows SyncRootManager functionality.