Skip to content

T1639.001 Exfiltration Over Unencrypted Non-C2 Protocol

Adversaries may steal data by exfiltrating it over an un-encrypted network protocol other than that of the existing command and control channel. The data may also be sent to an alternate network location from the main command and control server.

Adversaries may opt to obfuscate this data, without the use of encryption, within network protocols that are natively unencrypted (such as HTTP, FTP, or DNS). Adversaries may employ custom or publicly available encoding/compression algorithms (such as base64) or embed data within protocol headers and fields.

Item Value
ID T1639.001
Sub-techniques T1639.001
Tactics TA0036
Platforms Android, iOS
Version 1.0
Created 06 April 2022
Last Modified 06 April 2022

Procedure Examples

ID Name Description
S0655 BusyGasper BusyGasper can download text files with commands from an FTP server and exfiltrate data via email.2
S0425 Corona Updates Corona Updates has exfiltrated data using FTP.1