FirstVDS says intruder copied customer disks via read-only mounts, leaving no traces on servers
Russian hosting provider FirstVDS disclosed on 19 October 2026 that an intruder stole customer data without directly compromising virtual machines. The malware mounted customer virtual disks in read-only mode, copied their contents, and left the servers running normally. Because a read-only attach is a hypervisor-level operation, evidence sits in management platform, storage, and hypervisor logs rather than inside guests, so guest-side monitoring would not detect it. The provider told affected customers to assume their data was stolen, citing an inability to attribute the activity per tenant. External scans, such as one that found 2,823 VMmanager interfaces, show exposure but not whether those platforms log disk attaches.
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