Suspicious ESXi execInstalledOnly Disabled via esxcli During Ransomware

ATT&CK techniques

Impact

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
- T1490Inhibit System Recovery

What it detects

This rule detects esxcli disabling the execInstalledOnly enforcement setting on an ESXi host which ransomware crews do to allow unsigned binaries to run before encrypting virtual machines. Attackers weaken hypervisor integrity controls to deploy their locker at scale.

Reporting behind it

Related detections9 linkedT1685 — drag to rearrange

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Malicious Defender Exclusion Added for User Profile Path

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Suspicious macOS SIP Disable via csrutil (via process_creation)

Suspicious ESXi execInstalledOnly Disabled via esxcli During Ransomware

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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