Adversaries may disable or modify a firewall within a cloud environment to bypass controls that limit access to cloud resources.
Cloud environments typically utilize restrictive security groups and firewall rules that only allow network activity from trusted IP addresses via expected ports and protocols. An adversary with appropriate permissions may introduce new firewall rules or policies to allow access into a victim cloud environment and/or move laterally from the cloud control plane to the data plane.
For example, an adversary may use a script or utility that creates new ingress rules in existing security groups (or creates new security groups entirely) to allow any TCP/IP connectivity to a cloud-hosted instance. They may also remove networking limitations to support traffic associated with malicious activity (such as cryptomining).(Citation: Palo Alto Unit 42 Compromised Cloud Compute Credentials 2022)(Citation: Expel AWS)
View in MITRE ATT&CK®| Capability ID | Capability Description | Mapping Type | ATT&CK ID | ATT&CK Name | Notes |
|---|---|---|---|---|---|
| resource_manager | Resource Manager | technique_scores | T1686.001 | Cloud Firewall |
Comments
This control adopts the security principle of least privilege, which grants necessary access to user's resources when justified and needed. This control manages access control and ensures proper user permissions are in place to prevent adversaries that try to modify and/or disable firewall.
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| resource_manager | Resource Manager | technique_scores | T1686.001 | Cloud Firewall |
Comments
An adversary may disable cloud logging capabilities and integrations to limit what data is collected on their activities and avoid detection. GCP allows configuration of account policies to enable logging and IAM permissions and roles to determine your ability to access audit logs data in Google Cloud resources.
References
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| security_command_center | Security Command Center | technique_scores | T1686.001 | Cloud Firewall |
Comments
SCC is able to detect changes to VPC service controls that could modify and reduced the secured perimeter. This security solution protects against modifications that could lead to a lower security posture and defense evasion. Because of the near-real time temporal factor to detect against this cyber-attack the control was graded as significant.
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