AN0837: Analytic 0837
ESXi hypervisor permission modification behavioral chain: (1) SSH access to ESXi host, (2) chmod/chown execution on VMFS datastore files or system configuration, (3) Modification of VM configuration files (.vmx) or virtual disk permissions, (4) Hostd service log correlation, (5) vCenter permission change events if centrally managed
Analyst context for executives and security teams
AN0837 is a detection analytic for suspicious permission changes on ESXi hosts, especially when SSH access is followed by chmod/chown activity affecting VMFS datastore files, ESXi system configuration, VM configuration files, or virtual disk permissions. For leaders, this matters because ESXi permissions help determine who or what can alter virtual machines and their disks; weak visibility here can leave a major gap in resilience for virtualized workloads.
Executive priority
Treat this as a virtualization control and monitoring question: can the organization prove who accessed ESXi over SSH, what file permission changes occurred on VM datastores or host configuration, and whether vCenter recorded related permission events? Priority is highest where ESXi supports business-critical systems, because investigation and recovery decisions depend on trustworthy host, VM, and vCenter evidence.
Technical view
SOC and IR teams should validate telemetry across the behavioral chain described by MITRE: SSH access to the ESXi host; chmod or chown execution; permission changes involving VMFS datastore files, ESXi system configuration, .vmx files, or virtual disk files; hostd log correlation; and vCenter permission change events when centrally managed. Because MITRE provides no separate detection logic, teams should develop environment-specific correlation and baselines for authorized administrative maintenance versus unusual access and permission modification patterns.
Likely telemetry
- ESXi SSH authentication and session logs
- ESXi command execution evidence for chmod and chown where available
- VMFS datastore file metadata or audit evidence for permission and ownership changes
- VM configuration file (.vmx) and virtual disk permission change evidence
- ESXi hostd service logs
Detection direction
- Confirm ESXi hosts are sending relevant SSH, hostd, datastore, and vCenter events to the monitoring stack.
- Correlate SSH access with subsequent chmod/chown activity on VMFS datastore files, ESXi system configuration, .vmx files, or virtual disk files.
- Tune for authorized administrative windows and known maintenance automation to reduce false positives.
- Look for gaps where direct ESXi host activity is not visible through vCenter-only monitoring.
- Use centrally managed vCenter permission events as supporting context, not as the only source of truth for host-local changes.
Mitigation priorities
- Restrict and govern SSH access to ESXi hosts, including strong administrative access controls and documented break-glass use.
- Harden change management around VMFS datastore files, VM configuration files, virtual disks, and ESXi system configuration.
- Ensure ESXi host logs and vCenter events are retained long enough to support incident response and audit evidence.
- Regularly review administrative permissions for ESXi and vCenter-managed environments.
- Test incident response procedures for suspicious ESXi permission changes affecting critical virtual machines.
Analyst notes and limits
The supplied ATT&CK object is a detection analytic, not a technique, and it has no tactic mapping or relationship context. Its value is in highlighting the need to correlate host access, file permission changes, ESXi hostd logs, and vCenter events for ESXi environments.
MITRE did not provide official detection logic beyond the behavioral chain, and no relationships, adversary context, or active exploitation claims were supplied. Local ESXi logging configuration, vCenter architecture, administrative workflows, and retention determine whether this analytic can be implemented effectively.
Analytic 0837
ESXi hypervisor permission modification behavioral chain: (1) SSH access to ESXi host, (2) chmod/chown execution on VMFS datastore files or system configuration, (3) Modification of VM configuration files (.vmx) or virtual disk permissions, (4) Hostd service log correlation, (5) vCenter permission change events if centrally managed
How security teams should use this page
Treat this object as behavior context, not an attribution claim. Validate the related groups, software, data sources, and mitigations against official ATT&CK relationships and your own telemetry before making control-coverage decisions.
All related ATT&CK context
No relationships are available in the current normalized data for this object.
Object version and sync metadata
The fields below describe the current mirrored snapshot. When Glexia retains multiple ATT&CK source imports, you can open the table to compare the same object across releases (hashes and MITRE timestamps). For MITRE’s own release notes and roadmap, see ATT&CK resources — Updates .
Imported snapshots across ATT&CK releases (1)
| Release | Bundle imported | Object version | Modified | Status | Raw hash |
|---|---|---|---|---|---|
| 19.1 | 1.0 | Current bundle | 3d3a36ea50a8… |
Mirrored ATT&CK source object
The raw object is retained through the mirrored ATT&CK source bundle and object hash. The raw endpoint returns the exact object from the mirrored bundle when available.
External references and citations
MITRE external references are preserved separately from Glexia analysis so citations remain traceable to their original source records.
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mitre-attack AN0837Open source URL
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