DET0226: Detection Strategy for Masquerading via File Type Modification
DET0226 is a detection strategy entry for identifying masquerading through file type modification, mapped to ATT&CK technique T1036.008. The business signi...
Analyst context for executives and security teams
DET0226 is a detection strategy entry for identifying masquerading through file type modification, mapped to ATT&CK technique T1036.008. The business significance is that malicious files may be made to look legitimate by changing visible or structural file attributes, which can undermine user trust, triage quality, and basic file-handling controls. For leaders, this is less about one tool alert and more about whether the organization can prove it inspects files by content and behavior, not just by name, icon, or extension.
Executive priority
Prioritize this where file intake, endpoint execution, email attachments, downloads, developer workstations, or shared storage are important to operations. Ask whether security teams can validate mismatches between a file’s apparent type and its actual structure across Windows, macOS, and Linux environments associated with the related ATT&CK technique. This supports incident response readiness, audit evidence for malware prevention controls, and practical budget decisions around endpoint, file analysis, and SOC telemetry quality.
Technical view
The supplied detection strategy has no official detection text and no platforms of its own, but it detects T1036.008 Masquerade File Type, whose related platforms are Linux, macOS, and Windows and tactic is stealth. SOC and detection engineering teams should validate controls that compare file extension, signature/header or magic bytes, icon/metadata, content structure, and execution behavior. IR teams should treat suspicious file-type inconsistencies as triage leads and correlate them with process execution, file creation, download, email, archive extraction, and user activity evidence.
Likely telemetry
- Endpoint file creation and modification events
- File metadata including extension, path, icon, and attributes where available
- File signature/header or magic-byte inspection results
- Process execution events linked to recently created or renamed files
- Email, web download, and attachment handling logs where files enter the environment
Detection direction
- Validate that detections do not rely only on file extension or filename; compare apparent type with file signature and content structure when telemetry allows.
- Tune for mismatches between extension, header, icon, and actual parser-recognized file type, especially when followed by execution or scripting activity.
- Correlate file-type anomalies with source context such as downloads, attachments, shared folders, removable media, or archive extraction rather than alerting on every mismatch in isolation.
- Account for false positives from legitimate packaging, renamed files, developer artifacts, test files, or applications that use nonstandard extensions.
- Confirm coverage separately for Linux, macOS, and Windows because the related technique spans all three, while this detection strategy object does not provide platform-specific logic.
Mitigation priorities
- Establish file inspection that validates content type and signatures rather than trusting extensions, names, or icons.
- Harden endpoint and email/web controls to scrutinize suspicious attachments and downloads before user execution where applicable.
- Use application control or execution policy to reduce risk from untrusted or newly introduced files, while testing business exceptions.
- Improve SOC playbooks so file-type mismatches trigger consistent enrichment, containment decisions, and evidence preservation.
- Maintain logging and retention for file creation, rename, download, and process execution events to support incident reconstruction.
Analyst notes and limits
This take is based on the supplied ATT&CK detection strategy metadata and its relationship to T1036.008. The value of DET0226 is in prompting validation of file-type masquerading detection coverage, not in prescribing a specific analytic because the official detection field is not provided. Local engineering should define exact analytics based on available endpoint, email, web, and file-analysis telemetry.
The detection strategy object has no official description, no official detection text, no tactics, and no platforms listed directly. Platform references come only from the related T1036.008 technique. No claims are made about active exploitation, attribution, impact, or guaranteed detection coverage.
Detection Strategy for Masquerading via File Type Modification
No official description is available in the imported ATT&CK source object.
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.
Techniques used
This mirrors the MITRE pattern of making group, software, campaign, and technique relationships scannable. Relationship notes come from mirrored ATT&CK relationship text when available.
| Domain | ID | Name | Relationship / procedure |
|---|---|---|---|
| Enterprise | T1036.008 | Masquerade File Type Sub-technique | This object detects Masquerade File Type. |
All related ATT&CK context
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 | 721cc47bd4a5… |
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 DET0226Open source URL
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