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AT-3(4)—Suspicious Communications And Anomalous System Behavior

>Control Description

[ Moved to AT-2(4)]

>Assessment Interview Topics

Questions assessors commonly ask

Process & Governance:

  • •What formal policies and procedures govern the implementation of AT-3(4) (Suspicious Communications And Anomalous System Behavior)?
  • •Who are the designated roles responsible for implementing, maintaining, and monitoring AT-3(4)?
  • •How frequently is the AT-3(4) policy reviewed and updated, and what triggers policy changes?
  • •What training or awareness programs ensure personnel understand their responsibilities related to AT-3(4)?

Technical Implementation:

  • •Describe the specific technical mechanisms or controls used to enforce AT-3(4) requirements.
  • •What automated tools, systems, or technologies are deployed to implement AT-3(4)?
  • •How is AT-3(4) integrated into your system architecture and overall security posture?
  • •What configuration settings, parameters, or technical specifications enforce AT-3(4) requirements?

Evidence & Documentation:

  • •What documentation demonstrates the complete implementation of AT-3(4)?
  • •What audit logs, records, reports, or monitoring data validate AT-3(4) compliance?
  • •Can you provide evidence of periodic reviews, assessments, or testing of AT-3(4) effectiveness?
  • •What artifacts would you present during a FedRAMP assessment to demonstrate AT-3(4) compliance?

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