Techniques › T1027.016 › AN0914
AN0914 Analytic 0914
Linux · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detects ELF binaries written to disk that demonstrate anomalous file size or entropy, quickly followed by execution or memory region writes into remote processes (e.g., using ptrace).</p>
- Detects
- T1027.016 Junk Code Insertion
- Part of
- DET0322 Detection Strategy for Junk Code Obfuscation with Suspicious Execution Patterns
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 | write | DC0039 File Creation |
| auditd:SYSCALL | execve | DC0032 Process Creation |
| auditd:SYSCALL | SYSCALL ptrace/mprotect | DC0020 Process Modification |
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 |
|---|---|
BinarySizeThreshold | Used to flag binaries much larger than typical shell utilities or payloads |
MemoryWriteTargets | Which processes are allowed ptrace/mprotect – can limit to suspicious child-to-parent targeting |
ExecutionAfterWriteWindow | Temporal threshold for file write to execution |