Techniques › T1090.002 › AN0923
AN0923 Analytic 0923
Linux · attack.mitre.org · ATT&CK Enterprise v19.2
<p>
curl, wget, ncat, socat, or custom binaries initiate outbound traffic to Internet-based proxies (e.g., via VPS or CDN). Behavior may include reverse shell constructs or persistent outbound beacons.</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 |
|---|---|---|
| auditd:SYSCALL | execve | DC0032 Process Creation |
| NSM:Flow | conn.log or http.log | DC0085 Network Traffic Content |
| NSM:Flow | alert log | 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 |
|---|---|
CommandLinePattern | Regex or command substring matches indicative of dynamic proxy setup. |
ExternalIPList | Tunable list of IPs or ASNs related to known proxy/VPS abuse. |
UserContext | Unexpected users running networking tools (e.g., www-data, apache). |