Clop Ransomware Hits Gladinet CentreStack: 2025 Data Theft Alert
In December 2025, the Clop ransomware gang initiated a widespread extortion campaign by exploiting internet-facing Gladinet CentreStack file servers. Gladinet CentreStack, used by thousands of businesses worldwide, enables remote file sharing without VPNs. The attackers scanned for accessible servers, exploited a yet-undetermined (potentially zero-day or unpatched) vulnerability, and exfiltrated sensitive business data, leaving ransom notes for victims. The breaches escalated concerns after Clop’s history with major file transfer solutions, such as MOVEit and Oracle EBS, resulting in significant data leaks and operational disruption for affected organizations. This attack underscores the persistent risk posed by sophisticated ransomware groups exploiting file transfer and sharing platforms. With attackers rapidly leveraging unknown or unpatched security flaws, enterprises must prioritize robust vulnerability management for all internet-exposed assets and monitor threat actor trends targeting remote-access file servers.
Kill Chain