Techniques › T1021.005 › AN0506
AN0506 Analytic 0506
macOS · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detection of VNC-based remote control via
screensharingd activity in Unified Logs along with concurrent remote login activity or suspicious user interaction.</p>- Detects
- T1021.005 VNC
- Part of
- DET0178 Behavioral Detection of Unauthorized VNC Remote Control Sessions
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 | authentication | DC0067 Logon Session Creation |
| macos:osquery | process_events | DC0032 Process Creation |
| NSM:firewall | inbound connection to port 5900 | 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 |
|---|---|
AuthenticationPredicate | Unified log predicate to refine suspicious screensharing access |
TimeWindow | Time between VNC connection and follow-on activity (e.g., 30s) |
UserActivitySpike | Mouse/keyboard interaction spike immediately post-VNC login |