Application Layer Protocol

Adversaries may communicate using application layer protocols to avoid detection/network filtering by blending in with existing traffic. Commands to the mobile device, and often the results of those commands, will be embedded within the protocol traffic between the mobile device and server.

Adversaries may utilize many different protocols, including those used for web browsing, transferring files, electronic mail, or DNS.

ID: T1437
Sub-techniques:  T1437.001
Tactic Type: Post-Adversary Device Access
Platforms: Android, iOS
Version: 1.2
Created: 25 October 2017
Last Modified: 19 April 2022

Procedure Examples

ID Name Description
S0550 DoubleAgent

DoubleAgent has used both FTP and TCP sockets for data exfiltration.[1]


This type of attack technique cannot be easily mitigated with preventive controls since it is based on the abuse of system features.


Abuse of standard application protocols can be difficult to detect as many legitimate mobile applications leverage such protocols for language-specific APIs. Enterprises may be better served focusing on detection at other stages of adversarial behavior.