Rule Category

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.

Alert Message

MALWARE-CNC Win.Trojan.BlackRAT variant inbound connection

Rule Explanation

This event is generated when C2 traffic produced by BlackRAT is detected Impact: A Network Trojan was detected Details: BlackRAT is a trojan that maintains contact with its C2 server by creating a sentinel file on the victim machine. It creates persistence by copying itself to multiple locations and can exfiltrate data to the C2 from the victim machine. Ease of Attack:

What To Look For

Known Usage

No public information

False Positives

No known false positives


Cisco Talos Intelligence Group

MITRE ATT&CK Framework



For reference, see the MITRE ATT&CK vulnerability types here:

Additional Links

Rule Vulnerability

CVE Additional Information