Suspicious Azure Network Security Group Rule Opening Inbound Access to the Internet
- Product
- azure
- Service
- activitylogs
- Author
- HuntRule
- Published
- 2026-09-14
- Updated
- 2026-09-14
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 a Microsoft.Network/networkSecurityGroups/securityRules/write operation that creates an allow inbound rule with an unrestricted source, exposing resources to the entire Internet. Adversaries modify NSG rules to open management ports or services for later remote access after gaining cloud control-plane permissions. This is important because Internet-exposed inbound rules sharply increase attack surface and often precede lateral movement or data access.
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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Also included
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