Techniques › T1574.006 › AN1209
AN1209 Analytic 1209
Linux · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detection focuses on identifying abuse of LD_PRELOAD and related linker variables. Defender perspective: monitor unexpected setting or modification of LD_PRELOAD in shell initialization scripts or environment exports, file creation of suspicious shared libraries, and correlation of these modifications with anomalous process execution. Key signals include execve events with LD_PRELOAD defined, newly created .so files in user directories, and processes hooking libc functions exhibiting abnormal behavior.</p>
- Detects
- T1574.006 Dynamic Linker Hijacking
- Part of
- DET0435 Detection Strategy for Hijack Execution Flow: Dynamic Linker Hijacking
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 |
|---|---|---|
| auditd:SYSCALL | execve with LD_PRELOAD or linker-related environment variables set | DC0032 Process Creation |
| auditd:PATH | creation of .so files in non-standard directories (e.g., /tmp, /home/*) | DC0039 File Creation |
| linux:osquery | process environment variables containing LD_PRELOAD | DC0034 Process Metadata |
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 |
|---|---|
WatchedEnvVars | Environment variables like LD_PRELOAD, LD_LIBRARY_PATH. Defenders can tune based on development vs. production systems. |
MonitoredDirectories | Non-standard library paths (e.g., /tmp, user home dirs). May be tuned to reduce false positives from benign development activity. |
CorrelationWindow | Timeframe to correlate suspicious library creation with process execution that loads it. |