Techniques › T1027.014 › AN0919
AN0919 Analytic 0919
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Identifies self-modifying executables that exhibit changes in binary hash, entropy, or memory sections during or between executions—often tied to dynamic unpacking or decryption behaviors.</p>
- Detects
- T1027.014 Polymorphic Code
- Part of
- DET0324 Detection Strategy for Polymorphic Code Mutation and Execution
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 |
|---|---|---|
| WinEventLog:Sysmon | EventCode=1 | DC0032 Process Creation |
| WinEventLog:Sysmon | EventCode=7 | DC0016 Module Load |
| WinEventLog:Sysmon | EventCode=10 | DC0035 Process 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 |
|---|---|
EntropyThreshold | Tune based on expected baseline entropy for executables; higher values may indicate polymorphic packing. |
TimeWindow | Correlate rapid process spawn + image load activity suggesting mutation engine usage. |
ParentProcessPatterns | Define expected or suspicious parent-child chains (e.g., script runner -> encoded PE) |