Techniques › T1090 › AN1229
AN1229 Analytic 1229
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Suspicious process spawning (e.g.,
rundll32, svchost, powershell, or netsh) followed by network connection creation to internal hosts or uncommon external endpoints on high or non-standard ports.</p>- Detects
- T1090 Proxy
- Part of
- DET0445 Detection of Proxy Infrastructure Setup and Traffic Bridging
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 |
| NSM:Connections | Outbound Connection | DC0078 Network Traffic Flow |
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 |
|---|---|
ParentProcessName | Legitimate system processes that may rarely spawn network-capable child processes (e.g., `rundll32`, `svchost`). |
DestinationPort | Watch for high-numbered ports or well-known proxy ports like 1080, 8080, 4444. |
TimeWindow | Capture unusual spikes in outbound connections over a short period. |
KEV CVEs whose mapped technique this analytic detects
| CVE | Vendor / product | State |
|---|---|---|
| CVE-2019-3396 | Atlassian Confluence Server and Data Server | Mapped |
| CVE-2021-22986 | F5 BIG-IP and BIG-IQ Centralized Management | Mapped |
| CVE-2021-26855 | Microsoft Exchange Server | Mapped |