Techniques › T1090.001 › AN0205
AN0205 Analytic 0205
Linux · attack.mitre.org · ATT&CK Enterprise v19.2
<p>
socat, ssh, iptables, or ncat invoked from user space or cron jobs to create port forwarding, reverse shells, or inter-host tunnels between compromised Linux systems. Behavior is typically paired with socket activity and high entropy traffic.</p>- Detects
- T1090.001 Internal Proxy
- Part of
- DET0075 Internal Proxy Behavior via Lateral Host-to-Host C2 Relay
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:Connections | Internal connection logging | DC0078 Network Traffic Flow |
| NSM:Flow | conn.log | 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 |
|---|---|
UserContext | Alert on unexpected users executing inter-host relay tools (e.g., `www-data`, `backup`). |
PortRange | Adjust to watch for commonly misused internal TCP/UDP ports. |
ProcessPattern | Shell pipelines or wrapped invocations like `bash -c 'socat ...'` |
KEV CVEs whose mapped technique this analytic detects
| CVE | Vendor / product | State |
|---|---|---|
| CVE-2021-22017 | VMware vCenter Server | Mapped |