AWS Bedrock AgentCore with Public Network Browser or Code Interpreter Sandbox

Description

Detects the successful creation of an Amazon Bedrock AgentCore Browser or Code Interpreter with an execution IAM role and public network access. These sandboxes run agent-generated code or automated browsing on the caller's behalf, and the attached role lets the sandbox call other AWS services. Public network mode removes the sandbox's network containment, so a sandbox steered by prompt injection, malicious tool output, or code-execution abuse can reach the internet and pivot into other AWS resources with the role's permissions. Review the role scope and whether public egress is required.

Detection logic

Its licence does not clear it for publishing here

Sunturai publishes a detection's own text where the licence it arrived under has been reviewed and permits it, and Elastic License 2.0 has not. The query as its source wrote it, its canonical form and the hash that pins this revision are in the workspace record.

Detection requirements

Platform: Containers ESXi IaaS Identity Provider Linux macOS Network Devices Office Suite SaaS Windows
The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.
Log source category: event_index

Known benign triggers

Approved AgentCore Browsers or Code Interpreters that require public egress, such as a code interpreter installing packages or a browser tool reaching external sites, created by a known platform or CI/CD principal. Validate the caller, the attached execution role, and whether VPC or sandbox network mode was required by policy.

References

Links the source published beside this detection. Reference is the link the source wrote, unmodified. Class is decided by this catalogue from the host and path, not stated by the source. Cited by counts published detections citing the same resource, including this one, and the sources beneath it count the repositories this catalogue ingests, which is not the same as independent research.
Reference	Class	Cited by
sonraisecurity.com/blog/sandboxed-to-compromised-new-research-exposes-credential-exfiltration-paths-in-aws-code-interpreters/	Unclassified	2
unit42.paloaltonetworks.com/bypass-of-aws-sandbox-network-isolation-mode/	Threat report	3
www.beyondtrust.com/blog/entry/aws-agentcore-privilege-escalation	Unclassified	2

Detection rules

AWS Bedrock AgentCore with Public Network Browser or Code Interpreter Sandbox

Description

Detection logic

Detection requirements

Known benign triggers

MITRE ATT&CK mappings

References

From the source

Licence

Authorship

Detection rules