This script aims to enumerate common Windows configuration issues that can be leveraged for local privilege escalation. It also gathers various information that might be useful for exploitation and/or post-exploitation.

You can find more information about PrivescCheck here.

Assuming, the file PrivescCheck.ps1 is located in the current directory...

REM Basic usage
powershell -ep bypass -c ". .\PrivescCheck.ps1; Invoke-PrivescCheck"
REM Extended mode
powershell -ep bypass -c ". .\PrivescCheck.ps1; Invoke-PrivescCheck -Extended"
REM Extended mode + Write a report file (default format is raw text)
powershell -ep bypass -c ". .\PrivescCheck.ps1; Invoke-PrivescCheck -Extended -Report PrivescCheck_%COMPUTERNAME%"
REM Extended mode + Write report files in other formats
powershell -ep bypass -c ". .\PrivescCheck.ps1; Invoke-PrivescCheck -Extended -Report PrivescCheck_%COMPUTERNAME% -Format TXT,CSV,HTML,XML"

First, load the script in the current session (the first "." is a shortcut for Import-Module).

# Case #1: Execution policy is already set to "Bypass", so simply load the script.
. .\PrivescCheck.ps1
# Case #2: Default execution policy is set, so set it to "Bypass" for the current
# PowerShell process and load the script.
Set-ExecutionPolicy Bypass -Scope process -Force; . .\PrivescCheck.ps1
# Case #3: Execution policy is locked down, so get the file's content and pipe it
# to Invoke-Expression.
Get-Content .\PrivescCheck.ps1 | Out-String | IEX

Then, use the Invoke-PrivescCheck cmdlet.

# Show usage
Get-Help Invoke-PrivescCheck
# Basic usage
Invoke-PrivescCheck
# Extended mode
Invoke-PrivescCheck -Extended
# Extended mode + Write a report file (default format is raw text)
Invoke-PrivescCheck -Extended -Report "PrivescCheck_$($env:COMPUTERNAME)"
# Extended mode + Write report files in other formats
Invoke-PrivescCheck -Extended -Report "PrivescCheck_$($env:COMPUTERNAME)" -Format TXT,CSV,HTML,XML

If you run this script within a Meterpreter session, you will likely get a "timeout" error. Metasploit has a "response timeout" value, which is set to 15 seconds by default, but this script takes a lot more time to run in most environments.

meterpreter > load powershell
Loading extension powershell...Success.
meterpreter > powershell_import /local/path/to/PrivescCheck.ps1
[+] File successfully imported. No result was returned.
meterpreter > powershell_execute "Invoke-PrivescCheck"
[-] Error running command powershell_execute: Rex::TimeoutError Operation timed out.

It is possible to set a different value thanks to the -t option of the sessions command (documentation). In the following example, a timeout of 2 minutes is set for the session with ID 1.

msf6 exploit(multi/handler) > sessions -t 120 -i 1
[*] Starting interaction with 1...
meterpreter > powershell_execute "Invoke-PrivescCheck"

• You think you identified a bug or a false positive/negative?
• You think a particular check is missing?
• You think something could be improved?

That's awesome! 🙂 Please let me know by opening an issue and include as much detail as possible.

Especially if it's a bug, I will need:

• The Windows version and the PowerShell version.
• The script output (do not forget to remove sensitive information).