# communication\_to\_bad\_rep **Explanation** The communication\_to\_bad\_rep NDM is designed to detect successful outbound connections to a known bad IP. The NDM triggers when a connection is made to an IP address that is on a deny list or has been identified as a malicious IP. **What to Look For** The communication\_to\_bad\_rep NDM Event may indicate that a host on your network is compromised. IP Reputation, Reverse DNS, and Whois information for the remote IP address identified by the event may add valuable additional context for your investigation. Check your endpoint security solutions for signs of infected systems and take action to remediate any identified security threats. **Related MITRE ATT\&CK Categories** [Command and Control: Application Layer Protocol, Technique T1071 - Enterprise](https://attack.mitre.org/techniques/T1071) [Command and Control: Non-Application Layer Protocol, Technique T1095 - Enterprise](https://attack.mitre.org/techniques/T1095) [Command and Control: Non-Standard Port, Technique T1571 - Enterprise](https://attack.mitre.org/techniques/T1571) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.fusion.vectra.ai/detection-models/library/post-compromise/communication_to_bad_rep.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.