Techniques › T1620 › AN0839
AN0839 Analytic 0839
Linux · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Monitor for in-process mmap + mprotect + execve/execveat activity where memory permissions are changed from writable to executable inside the same process without a corresponding ELF on disk.</p>
- Detects
- T1620 Reflective Code Loading
- Part of
- DET0300 Detection Strategy for Reflective Code Loading
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 | DC0032 Process Creation |
| auditd:MMAP | memory region with RWX permissions allocated | DC0021 OS API Execution |
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 |
|---|---|
ProcessNameScope | Uncommon for service binaries to call memfd_create; detection tuned for high-risk processes. |
RWXMemoryThreshold | Adjust threshold for allowed RWX allocations to reduce false positives in JIT runtimes. |