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 MultiOS.Trojan.DarkUtilities variant outbound connection

Rule Explanation

Dark Utilities makes use of a custom TCP protocol for status updates, also known as heartbeats and keep-alives. This rule detects such communications.

What To Look For

This rule will alert when detecting a custom keep-alive packet to a C2 service related to Dark Utilities.

Known Usage

No public information

False Positives

No known false positives


Cisco Talos Intelligence Group

Rule Groups

No rule groups



Additional Links

Rule Vulnerability

No information provided

CVE Additional Information

This product uses data from the NVD API but is not endorsed or certified by the NVD.


MITRE ATT&CK Framework

Tactic: Command and Control

Technique: Custom Command and Control Protocol

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