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Hack Forums Hacks, Exploits, and Various Discussions Whitehat • Blue Team • Defensive Security Pentesting and Forensics › [The Brotherhood] Get All Environment Variables - 2 Python Methods / Scripts - FREE Source Code

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Get All Environment Variables - 2 Python Methods / Scripts - FREE Source Code
Hackers
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May 1, 2024 07:09 AM (This post was last modified: Mar 16, 2026 08:38 PM by Hackers.)
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Get All Environment Variables
2 Python Methods / Scripts - FREE Source Code

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In the first example below, we use the 'os' package to get environment variables. It's easy to see what's going on because of how the package already handles all of the hard work for us.
Code
import os

# Get all environment variables
env_vars = os.environ

# Open file to write
with open('output.txt', 'w') as f:
    # Iterate over each environment variable
    for key, value in env_vars.items():
        # Write to file
        f.write(f'{key}: {value}\n')

Example output which gives all of the key=value dumps:
Spoiler (Click to View)

In the next example, we go to a lower level and use the ctypes package to get wintypes & use kernel32 to fetch environment variables (GetEnvironmentVariableW). Just add or remove properties from the list if you need different data.
Code
import ctypes
from ctypes.wintypes import LPWSTR, DWORD

# Load the kernel32.dll
kernel32 = ctypes.WinDLL('kernel32', use_last_error=True)

# Define the GetEnvironmentVariable function
get_env_var = kernel32.GetEnvironmentVariableW
get_env_var.argtypes = [LPWSTR, LPWSTR, DWORD]
get_env_var.restype = DWORD

def get_environment_variable(name):
    buffer = ctypes.create_unicode_buffer(32767)  # Large buffer for the environment variable
    ret = get_env_var(name, buffer, 32767)
    if ret == 0:
        error = ctypes.get_last_error()
        if error:
            raise ctypes.WinError(error)
    return buffer.value

# List of environment variables to fetch
env_vars = [
    'ALLUSERSPROFILE', 'APPDATA', 'CHOCOLATEYINSTALL', 'CHOCOLATEYLASTPATHUPDATE',
    'COMMONPROGRAMFILES', 'COMMONPROGRAMFILES(X86)', 'COMMONPROGRAMW6432', 'COMPUTERNAME',
    'COMSPEC', 'CPLUS_INCLUDE_PATH', 'DRIVERDATA', 'EFC_11384', 'FPS_BROWSER_APP_PROFILE_STRING',
    'FPS_BROWSER_USER_PROFILE_STRING', 'HOME', 'HOMEDRIVE', 'HOMEPATH', 'LIBRARY_PATH',
    'LOCALAPPDATA', 'LOGONSERVER', 'NUMBER_OF_PROCESSORS', 'NVM_HOME', 'NVM_SYMLINK',
    'ONEDRIVE', 'OPENSSL_CONF', 'OS', 'PATH', 'PATHEXT', 'PROCESSOR_ARCHITECTURE',
    'PROCESSOR_IDENTIFIER', 'PROCESSOR_LEVEL', 'PROCESSOR_REVISION', 'PROGRAMDATA',
    'PROGRAMFILES', 'PROGRAMFILES(X86)', 'PROGRAMW6432', 'PSMODULEPATH', 'PUBLIC',
    'SESSIONNAME', 'SYSTEMDRIVE', 'SYSTEMROOT', 'TEMP', 'TMP', 'USERDOMAIN',
    'USERDOMAIN_ROAMINGPROFILE', 'USERNAME', 'USERPROFILE', 'VBOX_MSI_INSTALL_PATH', 'WINDIR'
]

# Fetch the values
env_values = {var: get_environment_variable(var) for var in env_vars}

# Write the fetched environment variables to 'output.txt'
with open('output.txt', 'w') as file:
    for key, value in env_values.items():
        file.write(f'{key}: {value}\n')

Here is our output.txt file from the ctypes Python script:
Spoiler (Click to View)
flyingduck
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May 1, 2024 07:13 AM
looking good! thx for putting up another quality share bro! <3
just because i'm a jewish black trans midget with bbc :(
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May 1, 2024 08:36 AM
(May 1, 2024 07:13 AM)flyingduck Wrote:  looking good! thx for putting up another quality share bro! <3

thanks duck! Hope this helps someone, it can be useful for a lot of different reasons.

If anyone wants help understanding part of the code just let me know!
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May 1, 2024 09:00 AM
(May 1, 2024 08:36 AM)Hackers Wrote:  thanks duck! Hope this helps someone, it can be useful for a lot of different reasons.

If anyone wants help understanding part of the code just let me know!

done and done 4 u :P

This Python script performs a couple of major functions related to working with environment variables on a Windows system, including accessing and writing them to a file. Here's a breakdown of its components and their purposes:

Importing Modules:
os: This module provides a way to interact with the operating system. In this script, it's used to access environment variables.
ctypes and ctypes.wintypes: These are used to interact with the Windows API, allowing for deeper system-level interactions.

Extracting and Writing Environment Variables to a File:
The script initially uses os.environ to get all environment variables, storing them in env_vars.
It then opens a file named output.txt in write mode.
It iterates over the env_vars dictionary and writes each key-value pair (representing environment variable names and values) to the file in the format KEY: VALUE.

Loading kernel32.dll Using ctypes:
kernel32 = ctypes.WinDLL('kernel32', use_last_error=True): This line loads the kernel32.dll library (a core Windows library) into the script, enabling direct API calls to system-level functions.
The script sets up a function GetEnvironmentVariableW from this DLL to fetch environment variable values, tailored to handle wide character strings (Unicode).

Defining a Python Function to Fetch Environment Variables:
get_environment_variable: This function is defined to wrap the GetEnvironmentVariableW API call. It uses a large buffer to ensure it can handle the value of any environment variable.
It checks if the API call fails (returns 0), and if so, it raises an error with the last error reported by the system.

Fetching Specific Environment Variables:
A list of specific environment variable names is defined.
The script then iterates over this list, fetching each environment variable's value using the previously defined get_environment_variable function.

Writing Specific Environment Variables to a File:
The script opens output.txt again in write mode and writes the values of the specific environment variables fetched via the Windows API.

This script is particularly useful for debugging or managing environment variables in a Windows environment, and it demonstrates advanced usage of Python for interacting with Windows system functions via APIs.
just because i'm a jewish black trans midget with bbc :(
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May 1, 2024 09:33 AM
Can you please recommend me to an AI app developer. I have a project I would like to get off the ground
Hackers
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May 2, 2024 04:32 AM
(May 1, 2024 09:00 AM)flyingduck Wrote:  done and done 4 u :P

(May 1, 2024 09:33 AM)LLynn101 Wrote:  Can you please recommend me to an AI app developer. I have a project I would like to get off the ground

Nice... What was your favorite part of this thread?
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May 5, 2024 08:15 AM
One-liner in Python for SSTI :

Code
open('leak.env', 'w').write(__import__('json').dumps(dict(__import__('os').environ), indent=4))
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Jun 11, 2024 07:10 PM
Ill come back when I know more Python.
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Jun 11, 2024 07:17 PM
(Jun 11, 2024 07:10 PM)K24Barton Wrote:  Ill come back when I know more Python.

nice, hope to see you soon!
Best of luck, let me know if you have any questions
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