C2 via FTP(S)

Created the Monday 12 June 2023. Updated 3 months, 1 week ago.

C2 via FTP is a technique that utilizes the File Transfer Protocol (FTP) to establish command and control communication between an attacker and victim systems. It involves sending commands and receiving responses within FTP sessions, effectively using FTP as a conduit for covert communication.

To implement C2 via FTP, an attacker needs control over an FTP server, and must establish a connection to a compromised system that has access to an external network. The victim’s system must be capable of initiating FTP sessions with the attacker's server. Additionally, the attacker could employ various means of obfuscation to make the traffic appear innocuous and blend in with legitimate FTP traffic.

C2 via FTP can serve diverse objectives, such as remotely executing commands, managing malware, or orchestrating multistage attacks. Detecting C2 via FTP can be challenging, as FTP is a widely-used protocol for legitimate file transfers, and the malicious traffic may not raise alarms in a network’s security monitoring systems. Moreover, if FTPS (FTP Secure) is used, the data is encrypted, adding an additional layer of complexity to detection.

Technique Identifier


Technique Tags


Featured Windows API's

Below, you will find a list of the most commonly used Windows API's that are currently utilized by malware authors for current evasion technique. This list is meant to provide an overview of the API's that are commonly used for this purpose. If there are any API's that you feel should be included on this list, please do not hesitate to contact us. We will be happy to update the list and provide any additional information or documentation that may be helpful.

Code Snippets


Additional Resources

External Links

The resources provided below are associated links that will give you even more detailed information and research on current evasion technique. It is important to note that, while these resources may be helpful, it is important to exercise caution when following external links. As always, be careful when clicking on links from unknown sources, as they may lead to malicious content.

Subscribe to our Newsletter

The information entered into this form is mandatory. It will be subjected to computer processing. It is processed by computer in order to support our users and readers. The recipients of the data will be : contact@unprotect.it.

According to the Data Protection Act of January 6th, 1978, you have at any time, a right of access to and rectification of all of your personal data. If you wish to exercise this right and gain access to your personal data, please write to Thomas Roccia at contact@unprotect.it.

You may also oppose, for legitimate reasons, the processing of your personal data.