AN0915: Analytic 0915
Identifies Mach-O binaries dropped into temporary directories with abnormally high binary size or padding patterns, followed by privilege escalation, `exec`, or memory mapping of other processes.
Analyst context for executives and security teams
This analytic matters because it focuses on suspicious macOS binaries appearing in temporary directories and then behaving in ways that can indicate attempted privilege escalation or process interaction. For leaders, the decision value is whether macOS endpoint monitoring can distinguish normal temporary-file activity from executable staging that may precede higher-risk system access.
Executive priority
Prioritize this as a macOS endpoint visibility and incident readiness question, not as a standalone proof of compromise. Security leaders should ask whether temporary-directory execution, unusually large or padded Mach-O binaries, privilege escalation activity, process execution, and memory mapping events are logged, retained, and actionable for SOC review. The business risk is delayed detection of suspicious macOS execution paths if endpoint telemetry is incomplete or if temporary-directory activity is treated as routine noise.
Technical view
Validate coverage for macOS Mach-O binaries created or dropped in temporary directories, especially when file size is abnormal or padding-like patterns are present, and correlate that with later privilege escalation, exec activity, or memory mapping involving other processes. Because the official object provides no detection logic and no ATT&CK tactic mapping, teams should treat this as a behavioral analytic concept requiring local baselining of legitimate software installers, updaters, developer tooling, and enterprise management agents that may use temporary paths.
Likely telemetry
- macOS file creation or modification events in temporary directories
- Mach-O file metadata, including path, size, and binary characteristics
- Process execution events, including parent-child process context and command/path details
- Privilege escalation-related endpoint events where available
- Process memory mapping or inter-process memory access telemetry where available
Detection direction
- Baseline legitimate large Mach-O files and padded binaries in temporary directories to reduce false positives from installers, patching tools, developer workflows, and management agents.
- Correlate file-drop events with subsequent execution, privilege escalation, exec behavior, or memory mapping rather than alerting on temporary-directory presence alone.
- Validate whether macOS sensors actually expose memory mapping and privilege escalation signals; these may be blind spots depending on endpoint tooling and configuration.
- Tune detections around chained behavior and timing windows so the analytic supports investigation without overwhelming analysts with benign temporary-file activity.
- Document gaps where only process execution is available but file characteristics or memory-mapping evidence are not collected.
Mitigation priorities
- Ensure managed macOS endpoints have endpoint telemetry enabled for file, process, and relevant privilege or memory interaction events.
- Harden software installation and administrative workflows so expected temporary-directory execution patterns are known and documented.
- Review least-privilege and administrative access controls on macOS systems to reduce the consequence of suspicious execution escalating privileges.
- Maintain allowlists or baselines for trusted enterprise tools that legitimately stage Mach-O binaries in temporary locations.
- Use incident response playbooks that preserve the dropped binary, process lineage, code-signing details, and related endpoint events for analysis.
Analyst notes and limits
The supplied ATT&CK object is a detection analytic for macOS only. It describes a suspicious behavioral chain but does not provide official detection pseudocode, tactics, related techniques, or relationship context. Local environment baselining is essential before using this as an alerting rule.
Assessment is limited to the official STIX fields, the MITRE external reference, and the absence of supplied relationships. No active exploitation, adversary attribution, impact, or guaranteed detection coverage is implied.
Analytic 0915
Identifies Mach-O binaries dropped into temporary directories with abnormally high binary size or padding patterns, followed by privilege escalation, `exec`, or memory mapping of other processes.
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 | d8acb8a77b8e… |
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-attack AN0915Open 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.