AWS Bedrock Third-Party or External Knowledge Base Associated to Agent

Description

Detects when an Amazon Bedrock agent is associated with, or updated to use, a knowledge base via the AssociateAgentKnowledgeBase, or UpdateAgentKnowledgeBase API actions. Bedrock agents consume knowledge base (RAG) content as trusted context for the model. By wiring an agent to an externally controlled or third-party knowledge base, or by swapping in an attacker-controlled knowledge base, an adversary can redraw the agent's trust boundary toward an untrusted source. This is a software-supply-chain compromise and an indirect prompt-injection delivery vector: poisoned or adversarial content served from the associated knowledge base is treated as authoritative by the agent. Validate that the associated knowledge base, and any underlying data source, is owned and controlled by your organization.

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: ESXi Linux macOS Network Devices Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source category: event_index

Known benign triggers

Legitimate platform, ML, or application teams may associate or update knowledge bases on Bedrock agents as part of normal development, onboarding, or RAG pipeline changes. Verify that the actor identity, user agent, and source IP correspond to expected automation or authorized engineers, and that the associated knowledge base is an approved, organization-owned resource. If known behavior is causing false positives, it can be exempted from the rule.

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
docs.aws.amazon.com/bedrock/latest/userguide/agents.html	Product documentation	2
docs.aws.amazon.com/bedrock/latest/userguide/knowledge-base.html	Product documentation	Only this detection cites it

Detection rules

AWS Bedrock Third-Party or External Knowledge Base Associated to Agent

Description

Detection logic

Detection requirements

Known benign triggers

MITRE ATT&CK mappings

References

From the source

Licence

Authorship

Detection rules