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.Ursnif variant outbound beacon

Rule Explanation

The rule looks for URLs in HTTP requests that match known Win.Trojan.Ursnif patterns.

What To Look For

This rule alerts on an outbound HTTP beaconing request generated by Win.Trojan.Ursnif.

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic: Exfiltration

Technique: Exfiltration Over Command and Control Channel

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