Cyber threat indicator

Definition

A cyber threat indicator (CTI) is

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information that is necessary to describe or identify — (A) malicious reconnaissance, including anomalous patterns of communications that appear to be transmitted for the purpose of gathering technical information related to a cybersecurity threat or security vulnerability; (B) a method of defeating a security control or exploitation of a security vulnerability; (C) a security vulnerability, including anomalous activity that appears to indicate the existence of a security vulnerability; (D) a method of causing a user with legitimate access to an information system or information that is stored on, processed by, or transiting an information system to unwittingly enable the defeat of a security control or exploitation of a security vulnerability; (E) malicious cyber command and control; (F) the actual or potential harm caused by an incident, including a description of the information exfiltrated as a result of a particular cybersecurity threat; (G) any other attribute of a cybersecurity threat, if disclosure of such attribute is not otherwise prohibited by law; or (H) any combination thereof.

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