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.Dropper.Clipbanker file download attempt

Rule Explanation

This event is generated when a machine infected with a Clipsa/Clipbanker variant attempts to download additional files (most likely a coinminer) or a token/task from the C&C. Impact: A Network Trojan was detected Details: Clipsa works in 6 phases: the first ones are designed to steal crypto-mining data from users and the last two focus on finding and attacking vulnerable WordPress websites. Ease of Attack:

What To Look For

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic:

Technique:

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

Additional Links

Rule Vulnerability

CVE Additional Information