Libclamav includes a DLP module which can detect the following
    credit card issuers: AMEX, VISA, MasterCard, Discover, Diner's Club,
    and JCB and U.S. social security numbers inside text files.
    
Future versions of Libclamav may include additional features to
    detect other credit cards and other forms of PII (Personally
    Identifiable Information) which may be transmitted without the
    benefit of being encrypted.
Cisco 2019-02-28