t1421-system-network-connections-discovery

name	T1421_system-network-connections-discovery
description	Adversaries may attempt to get a listing of network connections to or from the compromised device they are currently accessing or from remote systems by querying for information over the network.
category	information-gathering
version	18.1
author	cyberstrike-official
tags	["mitre-attack","mobile","t1421","discovery","android"]
technique_id	T1421
tactic	discovery
all_tactics	["discovery"]
platforms	["Android"]
mitre_url	https://attack.mitre.org/techniques/T1421
tech_stack	["android"]
cwe_ids	["CWE-200"]
chains_with	[]
prerequisites	[]
severity_boost	{}

T1421 System Network Connections Discovery

High-Level Description

Adversaries may attempt to get a listing of network connections to or from the compromised device they are currently accessing or from remote systems by querying for information over the network.

This is typically accomplished by utilizing device APIs to collect information about nearby networks, such as Wi-Fi, Bluetooth, and cellular tower connections. On Android, this can be done by querying the respective APIs:

• WifiInfo for information about the current Wi-Fi connection, as well as nearby Wi-Fi networks. Querying the WiFiInfo API requires the application to hold the ACCESS_FINE_LOCATION permission.

• BluetoothAdapter for information about Bluetooth devices, which also requires the application to hold several permissions granted by the user at runtime.

• For Android versions prior to Q, applications can use the TelephonyManager.getNeighboringCellInfo() method. For Q and later, applications can use the TelephonyManager.getAllCellInfo() method. Both methods require the application hold the ACCESS_FINE_LOCATION permission.

Kill Chain Phase

• Discovery (TA0032)

Platforms: Android

What to Check

• Identify if System Network Connections Discovery technique is applicable to target mobile environment
• Check Android devices for indicators of System Network Connections Discovery
• Assess detection coverage (1 detection strategies)

How to Test

Identify Attack Surface

Determine if the target mobile environment is susceptible to System Network Connections Discovery by examining the target platforms (Android).

Assess Existing Defenses

Review whether mitigations for T1421 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 System Network Connections Discovery

Risk Assessment

Finding	Severity	Impact
System Network Connections Discovery technique applicable