AN0276: Analytic 0276
Unauthorized firmware uploads to routers, switches, or firewalls via TFTP/FTP/SCP. Logs showing boot variable or startup image path changes redirecting to non-standard firmware images. Abnormal reboots or firmware rollback attempts following configuration modification events.
Analyst context for executives and security teams
This analytic concerns unauthorized firmware changes on network devices such as routers, switches, and firewalls. For leaders, the importance is operational trust: if firmware or boot paths are changed without authorization, a core network device may no longer behave as expected, may reboot unexpectedly, or may run an unapproved image. That can affect business continuity, incident containment, and confidence in network control evidence.
Executive priority
Prioritize this as a network infrastructure integrity and resilience issue. Executives and risk owners should ask whether firmware upload activity, boot variable changes, startup image path changes, and abnormal post-change reboots are logged, retained, and reviewed for critical network devices. This is also relevant to audit readiness because approved firmware baselines, authorized change records, and evidence of monitoring are needed to distinguish legitimate maintenance from suspicious modification.
Technical view
SOC, detection engineering, and IR teams should validate visibility for Network Devices around firmware upload paths using TFTP, FTP, or SCP; configuration events that alter boot variables or startup image locations; references to non-standard firmware images; abnormal reboots; and firmware rollback attempts after configuration modifications. Because ATT&CK provides no separate detection logic for this analytic, teams should build and tune detections from device logs, configuration-change telemetry, firmware inventory, and change-management context.
Likely telemetry
- Network device system and configuration logs
- Firmware upload or file transfer logs involving TFTP, FTP, or SCP
- Boot variable and startup image path change records
- Device reboot and crash/reload events
- Firmware version, image name, and image path inventory
Detection direction
- Alert on firmware upload events to routers, switches, or firewalls when not linked to an approved change window.
- Monitor boot variable or startup image path changes, especially when they reference non-standard or unexpected firmware images.
- Correlate configuration modification events with abnormal reboots or firmware rollback attempts.
- Tune for legitimate network maintenance to reduce false positives, but require strong evidence of authorization for firmware and boot-path changes.
- Validate log coverage across network device models; a common blind spot is assuming infrastructure devices produce consistent, centralized, and retained configuration telemetry.
Mitigation priorities
- Maintain an approved firmware baseline and inventory for critical network devices.
- Restrict and review administrative access capable of firmware upload or boot configuration changes.
- Use formal change control for firmware updates, boot variable changes, and rollback activity.
- Centralize and retain network device logs needed to reconstruct firmware and configuration changes.
- Regularly compare running and startup configuration, boot variables, and firmware image references against approved standards.
Analyst notes and limits
The supplied ATT&CK object is a detection analytic for Network Devices and describes suspicious firmware upload, boot path change, reboot, and rollback patterns. No tactics, relationships, or explicit detection query are supplied, so defensive value depends on local logging, firmware inventory, and change-management evidence.
This take is limited to the official STIX fields and external reference provided. It does not assert active exploitation, actor attribution, specific vendor behavior, or guaranteed detection coverage. Local device types, logging formats, retention, and administrative workflows must be assessed before operationalizing the analytic.
Analytic 0276
Unauthorized firmware uploads to routers, switches, or firewalls via TFTP/FTP/SCP. Logs showing boot variable or startup image path changes redirecting to non-standard firmware images. Abnormal reboots or firmware rollback attempts following configuration modification events.
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 | f0561acd1d05… |
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 AN0276Open source URL
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