AN1922: Analytic 1922
Monitor for firmware changes which may be observable via operational alarms from devices. Monitor device application logs for firmware changes, although not all devices will produce such logs. Monitor ICS management protocols / file transfer protocols for protocol functions related to firmware changes. Monitor firmware for unexpected changes. Asset management systems should be consulted to understand known-good firmware versions. Dump and inspect BIOS images on vulnerable systems and compare against known good images.[1] Analyze differences to determine if malicious changes have occurred. Log attempts to read/write to BIOS and compare against known patching behavior. Likewise, EFI modules can be collected and compared against a known-clean list of EFI executable binaries to detect potentially malicious modules. The CHIPSEC framework can be used for analysis to determine if firmware modifications have been performed.[2][3][4]
Security context for executives and security teams
AN1922: Analytic 1922 describes Monitor for firmware changes which may be observable via operational alarms from devices. Monitor device application logs for firmware changes, although not all devices will produce such logs. Monitor ICS management protocols / file transfer protocols for protocol functions related to firmware changes. Monitor firmware for unexpected changes. Asset management systems should be consulted to understand known-good firmware versions. Dump and inspect BIOS images on vulnerable systems and compare against known good imag...
Executive priority
AN1922: Analytic 1922 is an official MITRE ATT&CK detection analytic. Glexia treats it as defensive behavior context for prioritizing monitoring, control validation, and response planning without using the object by itself as an attribution claim.
Technical view
Security teams should validate AN1922: Analytic 1922 by reviewing the official ATT&CK relationships, mapped tactics (the mapped ATT&CK tactic context), supported platforms (None), and available local telemetry before making detection or mitigation decisions.
Likely telemetry
- Official ATT&CK relationships and object metadata
Detection direction
- Validate whether AN1922: Analytic 1922 appears in your detection coverage and tabletop scenarios.
- Use the object to align executive risk language with SOC, incident response, and detection engineering work.
- Do not treat ATT&CK relationship context as attribution without corroborating evidence.
Mitigation priorities
- Map the object to existing controls and identify missing telemetry or response ownership.
- Prioritize mitigations that reduce exposure on the listed platforms and tactics.
- Review adjacent ATT&CK relationships before changing policy, detections, or reporting language.
Additional notes and limits
Baseline Glexia take generated from the official MITRE ATT&CK STIX object, source hash, tactics, platforms, and detection fields. It is safe to replace with a richer model-generated take for the same source hash later.
This baseline take is source-grounded and schema-validated, but it does not include environment-specific telemetry, incident evidence, or threat-intelligence corroboration.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Analytic 1922
Monitor for firmware changes which may be observable via operational alarms from devices. Monitor device application logs for firmware changes, although not all devices will produce such logs. Monitor ICS management protocols / file transfer protocols for protocol functions related to firmware changes. Monitor firmware for unexpected changes. Asset management systems should be consulted to understand known-good firmware versions. Dump and inspect BIOS images on vulnerable systems and compare against known good images.[1] Analyze differences to determine if malicious changes have occurred. Log attempts to read/write to BIOS and compare against known patching behavior. Likewise, EFI modules can be collected and compared against a known-clean list of EFI executable binaries to detect potentially malicious modules. The CHIPSEC framework can be used for analysis to determine if firmware modifications have been performed.[2][3][4]
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(2)
| Release | Bundle imported | Object version | Modified | Status | Raw hash |
|---|---|---|---|---|---|
| 19.2 | 1.1 | Current bundle | 380803fd652e… | ||
| 19.1 | 1.1 | Older bundle | 380803fd652e… |
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.
- [1]MITRE Copernicus
Butterworth, J. (2013, July 30). Copernicus: Question Your Assumptions about BIOS Security. Retrieved December 11, 2015.
- [2]McAfee CHIPSEC Blog
Beek, C., Samani, R. (2017, March 8). CHIPSEC Support Against Vault 7 Disclosure Scanning. Retrieved March 13, 2017.
Open source URL - [3]Github CHIPSEC
Intel. (2017, March 18). CHIPSEC Platform Security Assessment Framework. Retrieved March 20, 2017.
Open source URL - [4]Intel HackingTeam UEFI Rootkit
Intel Security. (2005, July 16). HackingTeam's UEFI Rootkit Details. Retrieved November 17, 2024.
Open source URL - [5]mitre-attackAN1922Open source URL
Source: MITRE ATT&CK®. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. MITRE ATT&CK and ATT&CK are registered trademarks of The MITRE Corporation. Glexia is not affiliated with or endorsed by MITRE.