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.CrimsonRAT inbound connection attempt

Rule Explanation

This rule is looking an attempt by an attacker to infect client noted by reaching out to the cnc for command.

What To Look For

This rule alert on malicious traffic that attempts to make inbound connection to client.

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic: Command and Control

Technique: Remote Access Tools

For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org

Additional Links

Rule Vulnerability

N/A

Not Applicable

CVE Additional Information