SID 1:61391

Report a false positive

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.Malware.Agent data exfiltration attempt

Rule Explanation

This rule detects the attempted data exfiltration from an unknown malware variant used in a malware campaign in March of 2021 by looking for specific base64 encoded data in the URI of an HTTP GET request.

What To Look For

This rule detects the attempted data exfiltration from an unknown malware variant used in a malware campaign in March of 2021.

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

Rule Groups

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

MITRE::ATT&CK Framework::Enterprise::Exfiltration::Exfiltration Over C2 Channel

CVE

None

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

MITRE ATT&CK Framework

Tactic: Exfiltration

Technique: Exfiltration Over C2 Channel

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