Techniques › T1686.003 › AN2043
AN2043 Analytic 2043
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detects processes or users modifying Windows Defender Firewall profiles, policies, or rules followed by measurable network exposure changes. Correlates firewall management execution, registry/policy mutation, service state changes, and subsequent inbound or outbound connectivity inconsistent with baseline administration.</p>
- Detects
- T1686.003 Windows Host Firewall
- Part of
- DET0901 Detect Windows Firewall
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 |
|---|---|---|
| WinEventLog:Sysmon | EventCode=1 | DC0032 Process Creation |
| WinEventLog:Security | EventCode=4688 | DC0032 Process Creation |
| WinEventLog:Sysmon | EventCode=13, 14 | DC0063 Windows Registry Key Modification |
| WinEventLog:Sysmon | EventCode=12 | DC0056 Windows Registry Key Creation |
| WinEventLog:System | EventCode=7036 | DC0060 Service Creation |
| WinEventLog:Sysmon | EventCode=3, 22 | DC0082 Network Connection Creation |
| WinEventLog:Security | EventCode=5156, 5157 | 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 |
|---|---|
AuthorizedAdminAccounts | Known administrators allowed to manage host firewall settings |
MaintenanceWindow | Approved change windows where firewall modifications are expected |
ExposureCorrelationWindow | Time window to correlate firewall change with new connections/listeners |
SensitivePorts | Ports of concern such as RDP, SMB, WinRM, SSH, custom admin ports |
AllowedManagementParents | Expected parent processes such as SCCM, Intune agent, GPO client |
RuleScopeThreshold | Detect widening from subnet/local scope to Any/0.0.0.0/0 |