Techniques › T1205 › AN1450
AN1450 Analytic 1450
macOS · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Remote knock sequence followed by PF/socketfilterfw rule update or a background process listening on a new port; then a successful TCP session. Also flags WoL magic packets on local segment.</p>
- Detects
- T1205 Traffic Signaling
- Part of
- DET0524 Traffic Signaling (Port-knock / magic-packet → firewall or service activation) – T1205
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 |
|---|---|---|
| macos:unifiedlog | exec: Execution of /sbin/pfctl, /usr/libexec/ApplicationFirewall/socketfilterfw, ifconfig, tcpdump, npcap/libpcap consumers | DC0032 Process Creation |
| macos:unifiedlog | Firewall rule enable/disable or listen socket changes | DC0078 Network Traffic Flow |
| NSM:Flow | Closed-port hits followed by success from same src_ip | DC0082 Network Connection Creation |
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 |
|---|---|
PFAnchorPaths | Anchors or conf files monitored for change (/etc/pf.conf, /etc/pf.anchors/*). |
DeveloperMode | Reduce noise on dev endpoints compiling or testing PF rules. |