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.Proxy.Earthworm outbound connection

Rule Explanation

This rule alerts on network communications from the Earthworm network proxy tool. This rule may alert on any of the subcommands involved in the client-server handshake of custom TCP protocol used by Earthworm, including the establishment of a reverse socks5 tunnel from the server to the client.

What To Look For

This rule alerts on network communications from the Earthworm network proxy tool.

Known Usage

Attacks/Scans seen in the wild

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

Rule Groups

MITRE::ATT&CK Framework::Enterprise::Command and Control::Application Layer Protocol

CVE

None

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.

None