Techniques › T1564.009 › AN1609
AN1609 Analytic 1609
macOS · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Unexpected creation or modification of files with
com.apple.ResourceFork extended attributes containing unusually large or non-standard data. Defender perspective: detection of resource forks in contexts where they are uncommon, especially when paired with process execution or network activity.</p>- Detects
- T1564.009 Resource Forking
- Part of
- DET0584 Detection Strategy for Resource Forking on macOS
Log sources and channels
Exactly as MITRE states them in x_mitre_log_source_references. Where a channel is vague, it is vague in the source; kevmap does not tidy it.
| Log source | Channel | Data component |
|---|---|---|
| macos:unifiedlog | File creation or modification with com.apple.ResourceFork extended attribute | DC0059 File Metadata |
| macos:unifiedlog | Execution of commands like `ls -l@`, `xattr -l`, or custom tools interacting with resource forks | DC0064 Command Execution |
| macos:unifiedlog | Process creation involving binaries interacting with resource fork data | DC0032 Process Creation |
Mutable elements
Parameters MITRE marks as environment-specific. These are the knobs you are expected to tune; they are why an analytic is not a rule.
| Field | Description |
|---|---|
ResourceForkSizeThreshold | Adjust thresholds for 'unusually large' resource fork data based on baseline usage in the environment. |
MonitoredDirectories | Scope monitoring to sensitive directories such as /Users, /Applications, or temporary paths. |
CorrelatedActivityWindow | Time window for correlating resource fork activity with subsequent execution or network activity. |