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T1481.003 One-Way Communication

Adversaries may use an existing, legitimate external Web service channel as a means for sending commands to a compromised system without receiving return output. Compromised systems may leverage popular websites and social media to host command and control (C2) instructions. Those infected systems may opt to send the output from those commands back over a different C2 channel, including to another distinct Web service. Alternatively, compromised systems may return no output at all in cases where adversaries want to send instructions to systems and do not want a response.

Popular websites and social media, acting as a mechanism for C2, may give a significant amount of cover. This is due to the likelihood that hosts within a network are already communicating with them prior to a compromise. Using common services, such as those offered by Google or Twitter, makes it easier for adversaries to hide in expected noise. Web service providers commonly use SSL/TLS encryption, giving adversaries an added level of protection.

Item Value
ID T1481.003
Sub-techniques T1481.001, T1481.002, T1481.003
Tactics TA0037
Platforms Android, iOS
Version 1.1
Created 06 April 2022
Last Modified 20 March 2023

Procedure Examples

ID Name Description
S0302 Twitoor Twitoor can be controlled via Twitter.1


ID Data Source Data Component
DS0041 Application Vetting Network Communication