Threat Group – Unknown Threat Type – Remote Access Trojan with remote administration tool deployment Exploited Vulnerabilities – Phishing vectors, TightVNC privilege escalation CVE-2023-27830 Malware Used – MostereRAT Threat Score – 7.8 🔴 High Last Threat Observation – 9 September 2025 Overview A phishing campaign uncovered by Fortinet on 9 September 2025 is distributing MostereRAT, a