Malicious ESXi Firewall Disable via esxcli (via process_creation)

ATT&CK techniques

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the esxcli command that disables the ESXi host firewall, a defense-evasion action performed by the RansomHouse MrAgent tool before mass VM encryption. Turning off the hypervisor firewall opens management and lateral-movement paths ahead of the Mario ransomware deployment.

Reporting behind it

Related detections9 linkedT1685 — drag to rearrange

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Malicious WinRing0 Vulnerable Driver Load for Coin Mining

Windows Security Log: Defendnot scheduled task (defendnot) persistence via --from-autorun

PowerShell: Defendnot hacktool installation via one-liner fetching dnot.sh

Malicious ESXi Firewall Disable via esxcli (via process_creation)

Pivot detection · T1685 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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