Techniques › T1090 › AN1230
AN1230 Analytic 1230
Linux · attack.mitre.org · ATT&CK Enterprise v19.2
<p>User-space tools (e.g.,
socat, ncat, iptables, ssh) used in non-standard ways to establish reverse shells, port-forwarding, or inter-host connections. Often chained with uncommon outbound destinations or SSH tunnels.</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 |
|---|---|---|
| auditd:SYSCALL | execve | DC0032 Process Creation |
| NSM:Flow | Connection Tracking | 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 | Shell piping into tools like `socat`, `ncat`, or `openssl` for tunnel creation. |
OutboundPortRange | Flag connections made from internal systems to uncommon high ports externally. |
ProcessUserContext | Capture low-privilege or unexpected users executing system-level network tools. |
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 |