Suspicious Security Group Ingress Rule Opened to the Internet via CloudTrail

ATT&CK techniques

Initial Access → Persistence

Recon
Resource Dev
Initial Access
- T1133External Remote Services
Execution
Persistence
- T1133External Remote Services
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects AuthorizeSecurityGroupIngress events that add an ingress rule allowing the 0.0.0.0/0 or ::/0 CIDR range. Adversaries widen security groups to the entire internet to expose management and database service ports such as SSH, RDP, MySQL, and Redis for remote access or lateral movement. Opening a security group to any source weakens network boundaries and is a common precursor to exploitation.

Reporting behind it

Related detections9 linkedT1133 — drag to rearrange

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FortiGate: Addition of VPN SSL Web Portal via Event Logs

FortiGate SSL VPN Settings Edited

Windows Process Creation: GoAnywhere child command execution indicating possible MFT exploitation

Suspicious Security Group Ingress Rule Opened to the Internet via CloudTrail

Pivot detection · T1133 · 9 related

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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