Microsoft 2025: Storm-1175 Exploits GoAnywhere Zero-Day for Devastating Ransomware Attacks
In September 2025, a cybercrime group tracked as Storm-1175 exploited a critical zero-day deserialization vulnerability (CVE-2025-10035) in Fortra's GoAnywhere Managed File Transfer (MFT) solution. The attackers gained initial access by remotely targeting vulnerable MFT instances and leveraged remote monitoring tools (SimpleHelp, MeshAgent) for persistence. Subsequently, they conducted network reconnaissance with Netscan, moved laterally using Microsoft RDP, exfiltrated sensitive data with Rclone, and ultimately deployed Medusa ransomware payloads to encrypt files. This campaign affected multiple organizations, exposing unpatched systems to significant operational risk and data loss. The incident highlights a continued surge in ransomware operations leveraging zero-day vulnerabilities in widely used enterprise software. Attackers are increasingly exploiting supply chain and infrastructure components to maximize impact, driving regulatory scrutiny and accelerating the need for robust patch management and segmentation practices.
Kill Chain