Techniques › T1027.013 › AN0238
AN0238 Analytic 0238
Linux · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detection of suspicious use of shell utilities or scripts that decode or decrypt a payload and execute it without writing to disk.</p>
- Detects
- T1027.013 Encrypted/Encoded File
- Part of
- DET0087 Encrypted or Encoded File Payload Detection Strategy
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 |
| linux:Sysmon | EventCode=3, 22 | DC0082 Network Connection 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 |
|---|---|
UserContext | Normal usage of `base64`, `openssl`, or `gpg` varies by user/role. |
ProcessLineage | Parent-child process chains may differ across deployments. |
TimeWindow | Time between decode and execution is implementation-specific. |