AN0327: Analytic 0327
Correlates inbound network access to remote service ports (e.g., SMB/RPC 445/135, RDP 3389, WinRM 5985/5986) with near-time instability in the target service (crash, abnormal restart), suspicious child process creation under the service, and post-access lateral-movement behaviors. The chain indicates likely exploitation rather than normal administration.
Analyst context for executives and security teams
AN0327 is a Windows-focused detection analytic for distinguishing routine remote administration from likely exploitation of exposed remote service ports. Its value is in correlating three things that are more meaningful together than alone: inbound access to services such as SMB/RPC, RDP, or WinRM; near-time service instability such as crashes or abnormal restarts; and suspicious child process or lateral-movement behavior after access.
Executive priority
This analytic matters because remote service exploitation can quickly become an incident-response and business-continuity issue if it leads to lateral movement across Windows systems. Leaders should ask whether the organization can prove it collects the network, service-health, process, and lateral-movement evidence needed to validate this chain, especially on critical servers and administration pathways. It is also useful as audit and readiness evidence because it tests whether SOC monitoring can connect access, host instability, and follow-on behavior rather than alerting on isolated events.
Technical view
For SOC and detection teams, AN0327 should be treated as a correlation analytic, not a single-event rule. Validate visibility for inbound connections to Windows remote service ports including 445/135, 3389, and 5985/5986, then correlate those events with service crashes, abnormal restarts, unexpected child processes spawned by the service, and post-access lateral-movement behaviors. Because ATT&CK provides no separate detection text and no relationship context for this object, local baselining is required to separate legitimate administration, patching, vulnerability scanning, and service maintenance from suspicious chains.
Likely telemetry
- Windows network connection telemetry showing inbound access to SMB/RPC, RDP, and WinRM ports
- Windows service crash, restart, or service-control events
- Process creation telemetry, especially child processes spawned by remote-access or service processes
- Host logs showing abnormal service behavior near the time of inbound access
- Authentication and session records associated with remote access
Detection direction
- Build correlation around timing: inbound remote-service access followed closely by service instability, suspicious child process creation, or lateral-movement indicators.
- Tune against known administrative sources, vulnerability scanners, patching windows, remote management tools, and maintenance activity to reduce false positives.
- Prioritize high-value Windows systems and systems that accept SMB/RPC, RDP, or WinRM from broad network segments.
- Validate that alerts preserve the chain of evidence; isolated port access or isolated service restart events may not be enough to support escalation.
- Investigate visibility gaps where network telemetry, service telemetry, or process creation logs are missing, because the analytic depends on combining all three.
Mitigation priorities
- Reduce unnecessary exposure of Windows remote service ports and restrict access to approved administrative pathways.
- Harden remote administration practices and ensure access to SMB/RPC, RDP, and WinRM is limited, monitored, and attributable.
- Improve endpoint logging for service instability and process creation so incident responders can reconstruct the sequence of events.
- Use segmentation and access control to limit post-access lateral movement if a remote service is exploited.
- Review critical Windows assets first, since the business impact of remote-service exploitation and lateral movement is highest there.
Analyst notes and limits
The supplied ATT&CK object is a detection analytic, not a technique description. Its key decision value is the correlation pattern: remote service access plus near-time service instability plus suspicious child or lateral behavior. No ATT&CK relationships were supplied, so this take does not infer associated techniques, groups, software, or mitigations beyond the object’s own text.
Official detection content is not provided, tactics are not specified, and the object is limited to the Windows platform. Local environment data is required to define normal administration patterns, acceptable service restarts, and meaningful alert thresholds.
Analytic 0327
Correlates inbound network access to remote service ports (e.g., SMB/RPC 445/135, RDP 3389, WinRM 5985/5986) with near-time instability in the target service (crash, abnormal restart), suspicious child process creation under the service, and post-access lateral-movement behaviors. The chain indicates likely exploitation rather than normal administration.
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 | d9fba419ee68… |
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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[1]
mitre-attack AN0327Open source URL
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