Techniques › T1129 › AN0054
AN0054 Analytic 0054
macOS · attack.mitre.org · ATT&CK Enterprise v19.2
<p>A process loads a non-system .dylib/.so via dyld (dlopen/dlsym) from user-writable locations (~/Library, /tmp) or after the library was recently created/downloaded, often followed by network egress or persistence.</p>
- Detects
- T1129 Shared Modules
- Part of
- DET0018 Behavior-chain, platform-aware detection strategy for T1129 Shared Modules
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 | dyld/unified log entries indicating image load from non-system paths | DC0016 Module Load |
| macos:endpointsecurity | exec: Process execution context for loaders calling dlopen/dlsym | DC0032 Process Creation |
| macos:endpointsecurity | ES_EVENT_TYPE_NOTIFY_OPEN: Open of .dylib/.so in user-writable locations | DC0055 File Access |
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 |
|---|---|
SuspiciousDirs | ~/Library, /tmp, /Users/*/.* (hidden dirs) – tune to enterprise layout. |
UnsignedOnly | Alert only when code-signing is invalid or absent. |
TimeWindow | Correlate write/open to module load within N minutes. |