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NoPowerShell

NoPowerShell is a tool implemented in C# which supports executing PowerShell-like commands while remaining invisible to any PowerShell logging mechanisms. This .NET Framework 2 compatible binary can be loaded in Cobalt Strike to execute commands in-memory. No System.Management.Automation.dll is used; only native .NET libraries. An alternative usecase for NoPowerShell is to launch it as a DLL via rundll32.exe in a restricted environment: rundll32 NoPowerShell.dll,main.

This project makes it easy for everyone to extend its functionality using only a few lines of C# code. For more info, see CONTRIBUTING.md.

Latest binaries available from the Releases page. Bleeding edge code available in the DEV branch. To kickstart your NoPowerShell skills, make sure to also check out the cmdlet Cheatsheet.

Screenshots

Running in Cobalt Strike

NoPowerShell supported commands

Sample execution of commands

NoPowerShell sample commands

Rundll32 version

NoPowerShellDll via rundll32

Why NoPowerShell

NoPowerShell is developed to be used with the execute-assembly command of Cobalt Strike or in a restricted environment using rundll32. Reasons to use NoPowerShell:

  • Executes pretty stealthy
  • Powerful functionality
  • Provides the cmdlets you are already familiar with in PowerShell, so no need to learn yet another tool
  • If you are not yet very familiar with PowerShell, the cmd.exe aliases are available as well (e.g. ping instead of Test-NetConnection)
  • In case via powerpick or powershell cmdlets are not available, they are available in nps (e.g. cmdlets from the ActiveDirectory module)
  • Easily extensible with only a few lines of C#

Usage

Examples

See CHEATSHEET.md.

Use in Cobalt Strike via execute-assembly

Use Cobalt Strike's execute-assembly command to launch the NoPowerShell.exe. For example execute-assembly /path/to/NoPowerShell.exe Get-Command. Optionally NoPowerShell.cna can be used to add the nps alias to Cobalt Strike.

Use in Cobalt Strike via BOF.NET

  1. Install the BOF.NET BOF from https://github.com/CCob/BOF.NET
  2. Load the BOF.NET runtime: bofnet_init
  3. Load the NoPowerShell module: bofnet_load /path/to/NoPowerShell.dll
  4. Execute NoPowerShell cmdlets: bofnet_execute NoPowerShell.Program Get-Command

Use in Cobalt Strike using @williamknows fork of BOF.NET

This fork allows running regular .NET executables

  1. Obtain and compile @williamknows' fork of the BOF.NET from https://github.com/CCob/BOF.NET
  2. Load the BOF.NET runtime: bofnet_init
  3. Load the NoPowerShell module: bofnet_load /path/to/NoPowerShell.exe
  4. Execute NoPowerShell cmdlets: bofnet_executeassembly NoPowerShell Get-Command

Launch via rundll32

  1. Create a new shortcut to NoPowerShell.dll file (drag using right click -> Create shortcuts here)
  2. Update the shortcut prefixing the filename with rundll32 and appending ,main
  3. The shortcut will now look like rundll32 C:\Path\to\NoPowerShell.dll,main
  4. Double click the shortcut

Note

When using NoPowerShell from cmd.exe or PowerShell, you need to escape the pipe character (|) with respectively a caret (^) or a backtick (`), e.g.:

  • cmd.exe: ls ^| select Name
  • PowerShell: ls `| select Name

Known issues

  • Pipeline characters need to be surrounded by spaces
  • TLS 1.1+ is not supported by .NET Framework 2, so any site enforcing it will result in a connection error

Improvements

  • Fix above issues
  • Improve stability by adding exception handling
  • Support for parameter groups
  • Add support for .NET code in commandline, e.g.: [System.Security.Principal.WindowsIdentity]::GetCurrent().Name

Requested NoPowerShell cmdlets

Cmdlet Description
Invoke-Command Using PSRemoting execute a command on a remote machine (which in that case will of course be logged)
Get-Service Include option to also show service paths like in sc qc
* More *-Item* commands
Search-ADAccount
Get-ADPrincipalGroupMembership
Get-ADOrganizationalUnits
* More commands from the ActiveDirectory PowerShell module
* Sysinternals utilities like pipelist and sdelete

Contributed NoPowerShell cmdlets

Authors of additional NoPowerShell cmdlets are added to the table below. Moreover, the table lists commands that are requested by the community to add. Together we can develop a powerful NoPowerShell toolkit!

Cmdlet Contributed by GitHub Twitter Description

Included NoPowerShell cmdlets

Cmdlet Module Notes
Get-ADGroup ActiveDirectory
Get-ADGroupMember ActiveDirectory
Get-ADComputer ActiveDirectory
Get-ADObject ActiveDirectory
Get-ADUser ActiveDirectory
Get-ADTrust ActiveDirectory
Get-WinStation Additional
Get-RemoteSmbShare Additional
Get-Whoami Additional whoami.exe /ALL is not implemented yet
Expand-Archive Archive Requires .NET 4.5+
Compress-Archive Archive Requires .NET 4.5+
Where-Object Core
Get-Help Core
Get-Command Core
Resolve-DnsName DnsClient
Get-LocalGroup LocalAccounts
Get-LocalGroupMember LocalAccounts
Get-LocalUser LocalAccounts
Get-ItemProperty Management
Invoke-WmiMethod Management
Remove-Item Management
Copy-Item Management
Get-Content Management
Get-ChildItem Management
Get-WmiObject Management
Get-Process Management
Stop-Process Management
Get-HotFix Management
Get-PSDrive Management
Get-ItemPropertyValue Management
Set-Clipboard Management
Get-DnsClientCache Management
Get-ComputerInfo Management
Get-Clipboard Management
Get-NetRoute NetTCPIP
Get-NetIPAddress NetTCPIP
Get-NetNeighbor NetTCPIP No support for IPv6 yet
Test-NetConnection NetTCPIP
Get-GetNetTCPConnection NetTCPIP
Get-SmbShare SmbShare
Get-SmbMapping SmbShare
Format-Table Utility
Sort-Object Utility
Export-Csv Utility
Format-List Utility
Select-Object Utility
Out-File Utility
Write-Output Utility
Invoke-WebRequest Utility
Measure-Object Utility

Also make sure to check out the Cheatsheet for examples on how to use these cmdlets.

Acknowledgements

Various NoPowerShell cmdlets and NoPowerShell DLL include code created by other developers.

Who Website Notes
Contributors of pinvoke.net https://www.pinvoke.net/ Various cmdlets use snippets from pinvoke
Michael Conrad https://github.com/MichaCo/ Parts of the Resolve-Dns cmdlet are based on the code of the DnsClient.Net project
Rex Logan https://stackoverflow.com/a/1148861 Most code of the Get-NetNeighbor cmdlet originates from his StackOverflow post
PowerShell developers https://github.com/PowerShell/ Code of NoPowerShell DLL is largely based on the code handling the console input of PowerShell
Benjamin Delpy https://github.com/gentilkiwi/ Code of Get-WinStation is inspired by the code of Mimikatz' ts::sessions command
Dan Ports https://github.com/danports/ Marshalling code of Get-Winstation is partially copied from the Cassia project
Mazdak https://www.codeproject.com/Articles/2937/Getting-local-groups-and-member-names-in-C Native function calls for the Get-LocalGroupMember cmdlet
Rex Logan https://stackoverflow.com/a/1148861 Code of Get-NetNeighbor cmdlet

Authored by Arris Huijgen (@bitsadmin - https://github.com/bitsadmin/)