AN1898: Analytic 1898
Monitor for unexpected changes to project files, although if the malicious modification occurs in tandem with legitimate changes it will be difficult to isolate the unintended changes by analyzing only file systems modifications.
Analyst context for executives and security teams
This analytic matters because project files in an ICS environment can represent operational logic, engineering configuration, or other change-controlled assets. Unexpected changes may indicate unauthorized or unsafe modification, but MITRE notes an important limitation: if a malicious change is made alongside legitimate engineering work, file-system monitoring alone may not clearly separate intended from unintended changes.
Executive priority
Treat this as a change-control and resilience question, not just a file-monitoring rule. Leaders should ask whether critical project files are inventoried, baselined, backed up, and tied to an approval process that can produce audit evidence. Priority should go to environments where project-file integrity affects operational continuity, safety, or incident recovery decisions.
Technical view
SOC, OT security, and incident response teams should validate whether they can observe unexpected project-file changes and correlate them with authorized maintenance activity. Because no ATT&CK platforms, tactics, or relationships are supplied, implementation should be environment-specific. The key technical gap to test is whether file modification events can be linked to user identity, host, timestamp, approved work order, engineering session, and known-good project-file versions.
Likely telemetry
- File creation, modification, deletion, and rename events for monitored project-file locations
- File integrity monitoring or hash/baseline comparison records
- Engineering workstation or server logs where project files are stored or edited
- User authentication and access logs associated with file changes
- Change-management, maintenance-window, or work-order records
Detection direction
- Baseline known project-file locations and expected change patterns before alerting on deviations.
- Correlate file changes with approved engineering activity to reduce false positives from legitimate maintenance.
- Tune for changes outside approved windows, by unexpected users or systems, or affecting sensitive project files.
- Do not rely only on file-system modification events; MITRE explicitly notes that malicious changes made alongside legitimate edits may be difficult to isolate using file changes alone.
- Validate that alerts provide enough context for responders to determine whether rollback, engineering review, or operational escalation is needed.
Mitigation priorities
- Establish ownership, inventory, and approved storage locations for critical project files.
- Implement formal change control for project-file edits, including approval, logging, and review evidence.
- Maintain known-good backups or version history so unexpected changes can be compared and recovered.
- Restrict write access to project-file repositories based on operational need.
- Periodically test whether monitoring detects unauthorized or out-of-window project-file changes.
Analyst notes and limits
This is an ICS ATT&CK detection analytic, external ID AN1898, associated with MITRE detection strategy DET0766. The supplied object provides a narrow detection concept rather than a full technique mapping or implementation recipe. Its main decision value is validating project-file integrity monitoring and change-control correlation.
No platforms, tactics, relationships, or separate official detection text were supplied. The take therefore avoids claims about specific systems, adversary behavior, attribution, impact, or detection coverage. Local engineering workflows, file locations, access models, and change-management data are required to make this analytic actionable.
Analytic 1898
Monitor for unexpected changes to project files, although if the malicious modification occurs in tandem with legitimate changes it will be difficult to isolate the unintended changes by analyzing only file systems modifications.
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 | 881a5d8f7633… |
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 AN1898Open source URL
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