AN0812: Analytic 0812
Detection of file execution where the file name contains a trailing space to masquerade as a known executable. Adversaries may exploit the way command line interpreters handle file names with trailing whitespace.
Analyst context for executives and security teams
This analytic highlights a Linux masquerading behavior: a file is executed with a name that includes a trailing space, making it look like a known executable to humans or tools that display, trim, or normalize whitespace. The business relevance is that a small filename detail can undermine review, triage, and audit confidence if endpoint and command telemetry do not preserve exact process and file names.
Executive priority
Treat this as a control-validation item for Linux monitoring and incident readiness. Leaders should ask whether SOC tooling, log pipelines, and forensic procedures preserve whitespace exactly in process/file names, because normalization can create a blind spot where suspicious execution appears benign. This is most relevant to managed detection quality, Linux endpoint visibility, IR evidence handling, and auditability of security telemetry.
Technical view
Validate Linux process execution monitoring for files whose executed path or basename contains trailing whitespace, especially where the visible name resembles a legitimate executable. Because ATT&CK does not provide a detection implementation for AN0812, teams should test whether endpoint sensors, EDR consoles, SIEM parsers, and analyst workflows retain the original filename and command-line string without trimming. Review whether alerts or hunts compare exact byte/string values rather than normalized display values.
Likely telemetry
- Linux process execution events with full executable path and command line
- File creation/modification events that preserve exact filenames including trailing whitespace
- Endpoint/EDR process lineage showing parent process, user, working directory, and executed image path
- Shell history or audit logs where available, with attention to whitespace preservation
- SIEM-normalized fields and raw logs for comparison of trimmed versus original values
Detection direction
- Confirm that collection and parsing preserve trailing spaces in filenames and executable paths; compare raw telemetry to normalized SIEM fields.
- Hunt for executed files on Linux where the basename ends with whitespace and resembles a common executable name.
- Tune detections to reduce false positives by considering execution context, directory location, user, parent process, and whether the file name is intentionally unusual in approved software workflows.
- Add analyst display guidance so suspicious whitespace is made visible, for example through quoted values or escaped characters in triage views.
- Because no relationship context or ATT&CK detection logic is supplied, validate locally before treating this as high-fidelity.
Mitigation priorities
- Prioritize visibility first: ensure Linux endpoint and audit telemetry captures exact process and file names.
- Harden log pipelines and case-management workflows against silent whitespace trimming or normalization.
- Use file execution controls, allowlisting, or policy enforcement where appropriate to restrict untrusted executables, especially outside approved directories.
- Include whitespace-preservation checks in incident response evidence handling and detection engineering QA.
- Educate analysts to inspect quoted/raw paths when process names appear familiar but execution context is unusual.
Analyst notes and limits
AN0812 is a detection analytic, not a technique entry, and the supplied ATT&CK fields do not list tactics, relationships, or a formal detection query. The useful defensive takeaway is to test whether Linux execution telemetry and SOC presentation layers can distinguish an executable name from the same name with a trailing space.
This take is limited to the official description, Linux platform field, external reference, and absence of supplied relationships. It does not establish prevalence, attribution, active exploitation, impact, or guaranteed detectability. Local telemetry quality and parser behavior determine whether this analytic is actionable.
Analytic 0812
Detection of file execution where the file name contains a trailing space to masquerade as a known executable. Adversaries may exploit the way command line interpreters handle file names with trailing whitespace.
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 | 5d153d0f6522… |
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 AN0812Open source URL
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