AWS Bedrock AgentCore Resource Created with IAM Execution Role

Last updated 7 days ago on 2026-08-25

Created 7 days ago on 2026-08-25

About

Detects the creation of an AWS Bedrock AgentCore resource (code interpreter, agent runtime, browser, or harness) with an IAM execution role attached. When an attacker with iam:PassRole permission creates an AgentCore resource and attaches a privileged role, subsequent invocations inside that resource execute as the attached role — enabling privilege escalation to roles that trust bedrock-agentcore.amazonaws.com.

Tags

Domain: CloudData Source: AWSData Source: Amazon Web ServicesPlatform: AWSData Source: AWS CloudTrailService: AWS BedrockService: AWS IAMTactic: Privilege EscalationTactic: PersistenceRule Type: Custom Query (KQL)Language: kuery

Severity

medium

Risk Score

MITRE ATT&CK™

Privilege Escalation (TA0004)(external, opens in a new tab or window)

↳ Valid Accounts (T1078)(external, opens in a new tab or window)

Persistence (TA0003)(external, opens in a new tab or window)

↳ Account Manipulation (T1098)(external, opens in a new tab or window)

False Positive Examples

Legitimate provisioning of Bedrock AgentCore resources by CI/CD pipelines or platform engineers. Validate the caller identity against expected provisioning principals and verify the attached role is commensurate with the workload's documented requirements.

License

Elastic License v2(external, opens in a new tab or window)

Definition

Rule Type: Query (Kibana Query Language)
Integration Pack: Prebuilt Security Detection Rules
Index Patterns: logs-aws.cloudtrail-*
Related Integrations: aws(external, opens in a new tab or window)
Query

✄𐘗text code block:
✄𐘗event.dataset: "aws.cloudtrail" and
  event.provider: "bedrock-agentcore.amazonaws.com" and
  event.action: (
    "CreateCodeInterpreter" or
    "CreateAgentRuntime" or
    "CreateBrowser" or
    "CreateHarness"
  ) and
  event.outcome: "success" and
  aws.cloudtrail.request_parameters: (*executionRoleArn* or *roleArn*) and
  not aws.cloudtrail.user_identity.invoked_by: ("bedrock-agentcore.amazonaws.com" or "cloudformation.amazonaws.com")

Install detection rules in Elastic Security

Detect AWS Bedrock AgentCore Resource Created with IAM Execution Role in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).