t1639-001-exfiltration-over-unencrypted-non-c2-protocol

name	T1639.001_exfiltration-over-unencrypted-non-c2-protocol
description	Adversaries may steal data by exfiltrating it over an un-encrypted network protocol other than that of the existing command and control channel.
category	client-side
version	18.1
author	cyberstrike-official
tags	["mitre-attack","mobile","t1639.001","exfiltration","android","ios","sub-technique"]
technique_id	T1639.001
tactic	exfiltration
all_tactics	["exfiltration"]
platforms	["Android","iOS"]
mitre_url	https://attack.mitre.org/techniques/T1639/001
tech_stack	["android","ios"]
cwe_ids	["CWE-200"]
chains_with	["T1639"]
prerequisites	["T1639"]
severity_boost	{"T1639":"Chain with T1639 for deeper attack path"}

T1639.001 Exfiltration Over Unencrypted Non-C2 Protocol

Sub-technique of: T1639

High-Level Description

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.

Kill Chain Phase

• Exfiltration (TA0036)

Platforms: Android, iOS

What to Check

• Identify if Exfiltration Over Unencrypted Non-C2 Protocol technique is applicable to target mobile environment
• Check Android devices for indicators of Exfiltration Over Unencrypted Non-C2 Protocol
• Check iOS devices for indicators of Exfiltration Over Unencrypted Non-C2 Protocol
• Assess detection coverage (1 detection strategies)

How to Test

Identify Attack Surface

Determine if the target mobile environment is susceptible to Exfiltration Over Unencrypted Non-C2 Protocol by examining the target platforms (Android, iOS).

Assess Existing Defenses

Review whether mitigations for T1639.001 are in place. If defenses are absent or misconfigured, this technique may be exploitable.

Remediation Guide

No specific mitigations documented for this technique.

Detection

Detection of Exfiltration Over Unencrypted Non-C2 Protocol

Risk Assessment

Finding	Severity	Impact
Exfiltration Over Unencrypted Non-C2 Protocol technique applicable	Medium	Exfiltration

CWE Categories

CWE ID	Title
CWE-200	Exposure of Sensitive Information

References

• NIST Mobile Threat Catalogue