AN0593: Analytic 0593
Login to vSphere or ESXi hosts using domain accounts, especially those associated with vpxuser or unexpected group memberships.
Analyst context for executives and security teams
This analytic matters because domain-account logins to vSphere or ESXi hosts can represent access to highly critical virtualization infrastructure. For leaders, the decision point is whether the organization can prove who is authenticating to ESXi/vSphere, whether privileged or unexpected group memberships are justified, and whether activity involving sensitive service-style accounts such as vpxuser would be noticed quickly.
Executive priority
Prioritize this as a control-validation item for virtualization resilience and identity governance. ESXi hosts often support business-critical workloads, so weak visibility into domain-based access creates incident-response and audit gaps. Security leaders should ask whether ESXi/vSphere authentication is centrally logged, whether domain groups with access are formally approved, and whether exceptions involving vpxuser or unexpected memberships are reviewed with asset owners.
Technical view
The supplied ATT&CK object is a detection analytic for ESXi focused on logins to vSphere or ESXi hosts using domain accounts, especially accounts associated with vpxuser or unexpected group memberships. SOC and IR teams should validate that authentication events from ESXi/vSphere and the relevant domain identity source can be correlated by account, host, time, and group membership. Because no official detection logic is provided, teams should treat this as a detection-engineering requirement rather than a ready rule.
Likely telemetry
- vSphere or ESXi authentication and login events
- ESXi host access logs where available
- Domain authentication events for accounts used to access vSphere or ESXi
- Directory group membership data for groups permitted to access vSphere or ESXi
- Administrative account inventory and ownership records for accounts such as vpxuser or related access paths
Detection direction
- Baseline expected domain accounts and groups that authenticate to vSphere or ESXi hosts.
- Alert or investigate domain-account logins where the account is tied to unexpected group membership or lacks an approved administrative purpose.
- Correlate ESXi/vSphere login events with directory group membership at the time of access, not just current membership.
- Tune for legitimate administrative activity, maintenance windows, and known service/account behavior to reduce false positives.
- Identify blind spots where ESXi host logs, vSphere events, or directory membership history are not retained or not forwarded to the SOC.
Mitigation priorities
- Maintain an approved inventory of domain accounts and groups authorized to access vSphere or ESXi.
- Review and remove unexpected or unnecessary group memberships that grant virtualization access.
- Ensure authentication and administrative access events from vSphere/ESXi and the domain identity source are retained and available for investigation.
- Require periodic access reviews for privileged virtualization access, including accounts associated with vpxuser where applicable.
- Document evidence of logging, access review, and exception handling for audit and incident-readiness purposes.
Analyst notes and limits
No ATT&CK tactics, relationships, or official detection logic were supplied. The practical value is therefore in using the analytic as a coverage checklist for identity telemetry and virtualization administration monitoring, not as a complete detection rule.
This take is limited to the official supplied fields: ESXi platform, the analytic description, and the MITRE external reference. It does not establish adversary behavior, active exploitation, impact, or guaranteed detection coverage. Local account models, logging configuration, and directory integration determine what can actually be detected.
Analytic 0593
Login to vSphere or ESXi hosts using domain accounts, especially those associated with vpxuser or unexpected group memberships.
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 | 92f3c9973943… |
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 AN0593Open source URL
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