The following links may help to troubleshoot:
https://community.spiceworks.com/topic/252957-the-system-detected-a-possible-attempt-to-compromise-security
https://www.sqlservercentral.com/Forums/Topic498813-359-1.aspx
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/7e6be4d2-d657-44b9-a03d-992144f6df0c/sql-network-interfaces-the-system-detected-a-possible-attempt-to-compromise-security?forum=sqlsecurity