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RansomwarehighExploited in the wild

ESXi and Proxmox ransomware cases from misconfigured credentials

Original title: Virtualization security: attack layers and misconfiguration impact

Kaspersky Securelistby Rauf Johari ()13 min read1
AI summary · x-ai/grok-4.7Summaries by Vani AI

Attackers compromised hypervisors via monitoring tools and reused root passwords without VM escapes.

Kaspersky investigated ransomware incidents on ESXi and Proxmox. BlackNevas ransomware used PRTG Network Monitor credentials to reach ESXi hosts over SSH. The Gentlemen group exploited plain text admin notes on a workstation to access Proxmox. Shared credentials and weak access controls formed the attack path.

Key facts
  • PRTG stored VMware root credentials
  • Same root password reused across ESXi nodes
  • Monitoring system enabled hypervisor compromise
  • No VM escape required
Security assessment · AI, from the articleExploited in the wild

Impact: hypervisor compromise and ransomware encryption

ProductAffected
VMware ESXi—
Proxmox—
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From the original article

13 min read at securelist.com

A detailed breakdown of misconfigurations in virtual environment cybersecurity as shown by examples of ransomware cases on ESXi and Proxmox environments.

Kaspersky Securelist

By Rauf Johari · securelist.com

Read the full article at Kaspersky Securelist

A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.