NetExec/cme/protocols/smb/passpol.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#Stolen from https://github.com/Wh1t3Fox/polenum

from impacket.dcerpc.v5.rpcrt import DCERPC_v5
from impacket.dcerpc.v5 import transport, samr
from time import strftime, gmtime
from cme.logger import cme_logger


def d2b(a):
    tbin = []
    while a:
        tbin.append(a % 2)
        a //= 2

    t2bin = tbin[::-1]
    if len(t2bin) != 8:
        for x in range(6 - len(t2bin)):
            t2bin.insert(0, 0)
    return ''.join([str(g) for g in t2bin])


def convert(low, high, lockout=False):
    time = ""
    tmp = 0

    if low == 0 and hex(high) == "-0x80000000":
        return "Not Set"
    if low == 0 and high == 0:
        return "None"

    if not lockout:
        if (low != 0):
            high = abs(high+1)
        else:
            high = abs(high)
            low = abs(low)

        tmp = low + (high)*16**8  # convert to 64bit int
        tmp *= (1e-7)  # convert to seconds
    else:
        tmp = abs(high) * (1e-7)

    try:
        minutes = int(strftime("%M", gmtime(tmp)))
        hours = int(strftime("%H", gmtime(tmp)))
        days = int(strftime("%j", gmtime(tmp)))-1
    except ValueError as e:
        return "[-] Invalid TIME"

    if days > 1:
        time += f"{days} days "
    elif days == 1:
        time += f"{days} day "
    if hours > 1:
        time += f"{hours} hours "
    elif hours == 1:
        time += f"{hours} hour "
    if minutes > 1:
        time += f"{minutes} minutes "
    elif minutes == 1:
        time += f"{minutes} minute "
    return time


class PassPolDump:
    KNOWN_PROTOCOLS = {
        "139/SMB": (r"ncacn_np:%s[\pipe\samr]", 139),
        "445/SMB": (r"ncacn_np:%s[\pipe\samr]", 445),
    }

    def __init__(self, connection):
        self.logger = connection.cme_logger
        self.addr = connection.host if not connection.kerberos else connection.hostname + '.' + connection.domain
        self.protocol = connection.args.port
        self.username = connection.username
        self.password = connection.password
        self.domain = connection.domain
        self.hash = connection.hash
        self.lmhash = ''
        self.nthash = ''
        self.aesKey = None
        self.doKerberos = connection.kerberos
        self.protocols = PassPolDump.KNOWN_PROTOCOLS.keys()
        self.pass_pol = {}

        if self.hash is not None:
            if self.hash.find(':') != -1:
                self.lmhash, self.nthash = self.hash.split(':')
            else:
                self.nthash = self.hash
        
        if self.password is None:
            self.password = ''

    def dump(self):
        # Try all requested protocols until one works.
        for protocol in self.protocols:
            try:
                protodef = PassPolDump.KNOWN_PROTOCOLS[protocol]
                port = protodef[1]
            except KeyError:
                cme_logger.debug(f"Invalid Protocol '{protocol}'")
            cme_logger.debug(f"Trying protocol {protocol}")
            rpctransport = transport.SMBTransport(
                self.addr,
                port,
                r"\samr",
                self.username,
                self.password,
                self.domain,
                self.lmhash,
                self.nthash,
                self.aesKey,
                doKerberos=self.doKerberos
            )
            try:
                self.fetchList(rpctransport)
            except Exception as e:
                cme_logger.debug(f"Protocol failed: {e}")
            else:
                # Got a response. No need for further iterations.
                self.pretty_print()
                break

        return self.pass_pol

    def fetchList(self, rpctransport):
        dce = DCERPC_v5(rpctransport)
        dce.connect()
        dce.bind(samr.MSRPC_UUID_SAMR)

        # Setup Connection
        resp = samr.hSamrConnect2(dce)
        if resp["ErrorCode"] != 0:
            raise Exception("Connect error")

        resp2 = samr.hSamrEnumerateDomainsInSamServer(dce, serverHandle=resp["ServerHandle"],
                                                      enumerationContext=0,
                                                      preferedMaximumLength=500)
        if resp2["ErrorCode"] != 0:
            raise Exception("Connect error")

        resp3 = samr.hSamrLookupDomainInSamServer(dce, serverHandle=resp["ServerHandle"],
                                                  name=resp2["Buffer"]["Buffer"][0]["Name"])
        if resp3["ErrorCode"] != 0:
            raise Exception("Connect error")

        resp4 = samr.hSamrOpenDomain(dce, serverHandle=resp["ServerHandle"],
                                     desiredAccess=samr.MAXIMUM_ALLOWED,
                                     domainId=resp3["DomainId"])
        if resp4["ErrorCode"] != 0:
            raise Exception("Connect error")

        self.__domains = resp2["Buffer"]["Buffer"]
        domainHandle = resp4["DomainHandle"]
        # End Setup

        re = samr.hSamrQueryInformationDomain2(dce, domainHandle=domainHandle,
                                               domainInformationClass=samr.DOMAIN_INFORMATION_CLASS.DomainPasswordInformation)
        self.__min_pass_len = re["Buffer"]["Password"]["MinPasswordLength"] or "None"
        self.__pass_hist_len = re["Buffer"]["Password"]["PasswordHistoryLength"] or "None"
        self.__max_pass_age = convert(int(re["Buffer"]["Password"]["MaxPasswordAge"]["LowPart"]), int(re['Buffer']['Password']['MaxPasswordAge']['HighPart']))
        self.__min_pass_age = convert(int(re["Buffer"]["Password"]["MinPasswordAge"]["LowPart"]), int(re['Buffer']['Password']['MinPasswordAge']['HighPart']))
        self.__pass_prop = d2b(re["Buffer"]["Password"]["PasswordProperties"])

        re = samr.hSamrQueryInformationDomain2(dce, domainHandle=domainHandle,
                                               domainInformationClass=samr.DOMAIN_INFORMATION_CLASS.DomainLockoutInformation)
        self.__rst_accnt_lock_counter = convert(0, re["Buffer"]["Lockout"]["LockoutObservationWindow"], lockout=True)
        self.__lock_accnt_dur = convert(0, re["Buffer"]["Lockout"]["LockoutDuration"], lockout=True)
        self.__accnt_lock_thres = re["Buffer"]["Lockout"]["LockoutThreshold"] or "None"

        re = samr.hSamrQueryInformationDomain2(dce, domainHandle=domainHandle,
                                               domainInformationClass=samr.DOMAIN_INFORMATION_CLASS.DomainLogoffInformation)
        self.__force_logoff_time = convert(re["Buffer"]["Logoff"]["ForceLogoff"]["LowPart"], re['Buffer']['Logoff']['ForceLogoff']['HighPart'])

        self.pass_pol = {
            "min_pass_len": self.__min_pass_len,
            "pass_hist_len": self.__pass_hist_len,
            "max_pass_age": self.__max_pass_age,
            "min_pass_age": self.__min_pass_age,
            "pass_prop": self.__pass_prop,
            "rst_accnt_lock_counter": self.__rst_accnt_lock_counter,
            "lock_accnt_dur": self.__lock_accnt_dur,
            "accnt_lock_thres": self.__accnt_lock_thres,
            "force_logoff_time": self.__force_logoff_time
        }

        dce.disconnect()

    def pretty_print(self):

        PASSCOMPLEX = {
            5: "Domain Password Complex:",
            4: "Domain Password No Anon Change:",
            3: "Domain Password No Clear Change:",
            2: "Domain Password Lockout Admins:",
            1: "Domain Password Store Cleartext:",
            0: "Domain Refuse Password Change:"
        }

        cme_logger.debug("Found domain(s):")
        for domain in self.__domains:
            cme_logger.debug(f"{domain['Name']}")

        self.logger.success(f"Dumping password info for domain: {self.__domains[0]['Name']}")

        self.logger.highlight(f"Minimum password length: {self.__min_pass_len}")
        self.logger.highlight(f"Password history length: {self.__pass_hist_len}")
        self.logger.highlight(f"Maximum password age: {self.__max_pass_age}")
        self.logger.highlight("")
        self.logger.highlight(f"Password Complexity Flags: {self.__pass_prop or 'None'}")

        for i, a in enumerate(self.__pass_prop):
            self.logger.highlight(f"\t{PASSCOMPLEX[i]} {str(a)}")

        self.logger.highlight("")
        self.logger.highlight(f"Minimum password age: {self.__min_pass_age}")
        self.logger.highlight(f"Reset Account Lockout Counter: {self.__rst_accnt_lock_counter}")
        self.logger.highlight(f"Locked Account Duration: {self.__lock_accnt_dur}")
        self.logger.highlight(f"Account Lockout Threshold: {self.__accnt_lock_thres}")
        self.logger.highlight(f"Forced Log off Time: {self.__force_logoff_time}")