Techniques › T1090.002 › AN0922
AN0922 Analytic 0922
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Unusual process (e.g.,
rundll32, mshta, wscript, or custom payloads) initiates network connection to external IPs/domains that proxy C2 traffic, often over uncommon ports or high entropy HTTP/S connections.</p>- Detects
- T1090.002 External Proxy
- Part of
- DET0325 External Proxy Behavior via Outbound Relay to Intermediate Infrastructure
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=3, 22 | DC0082 Network Connection Creation |
| WinEventLog:Sysmon | EventCode=1 | DC0032 Process Creation |
| WinEventLog:Microsoft-Windows-Windows Defender/Operational | Unusual external domain access | DC0085 Network Traffic Content |
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 |
|---|---|
DestinationASN | Adjust for known benign but high-risk infrastructure (e.g., hosting providers like DigitalOcean, OVH, etc.). |
ParentProcess | Detect suspicious lineage—proxy tools launched from script interpreters or LOLBins. |
EntropyThreshold | Tune based on expected randomness in outbound request payloads. |