Suspicious Firewall Rule Masquerading As Windows Update (via process_creation)
- Product
- windows
- Category
- process_creation
- Author
- HuntRule
- Published
- 2026-08-18
- Updated
- 2026-08-28
ATT&CK techniques
Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects netsh adding an advfirewall rule named Windows Update, a masquerade used in Rhysida intrusions to open remote access ports while hiding behind a trusted name. Attacker-created firewall rules with system-service names often enable inbound RDP or C2 channels and merit investigation.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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