MALWARE-CNC -- Snort has detected a Comand and Control (CNC) rule violation, most likely for commands and calls for files or other stages from the control server. The alert indicates a host has been infiltrated by an attacker, who is using the host to make calls for files, as a call-home vector for other malware-infected networks, for shuttling traffic back to bot owners, etc.
MALWARE-CNC DNS Fast Flux attempt
This rule is looking for a DNS response that contains several answers to a single query where each response has an abnormally small TTL.
What To Look For
This rule alerts on malicious DNS responses.
No public information
No known false positives
Cisco Talos Intelligence Group