generate_powersehll_command.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

###################
#    This tool encodes PowerShell script to execute it in single command line (in memory).
#    Copyright (C) 2023  Maurice Lambert

#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.

#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.

#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
###################

from sys import argv, stdin, stderr, exit, stdout
from argparse import ArgumentParser, FileType
from base64 import b64encode

parser = ArgumentParser(
    description="This script generates a powershell command to execute script with only one command line (in memory)."
)
parser.add_argument(
    "-f",
    "--file",
    default=stdin,
    const=stdin,
    type=FileType(),
    nargs="?",
    help="Filename of the script to encode or stdin",
)
parser.add_argument(
    "-i",
    "--inputs",
    nargs="+",
    action="extend",
    help="Inputs to read in your powershell.",
)
parser.add_argument(
    "-p",
    "--as-process",
    action="store_true",
    help="Start this command as single process.",
)
arguments = parser.parse_args()

script = arguments.file.read()
arguments.file.close()

if arguments.as_process:
    stdout.write(r'C:\Windows\System32\cmd.exe /c "')

if arguments.inputs:
    inputs = "(echo " + " & echo ".join(arguments.inputs) + ") | "
    stdout.write(inputs)

print(
    r"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -ExecutionPolicy Unrestricted -EncodedCommand",
    b64encode(script.encode("utf-16-le")).decode()
    + ('"' if arguments.as_process else ""),
)
exit(0)