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BAT_Part2.py
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BAT_Part2.py
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from inspect import FullArgSpec
from os import read, terminal_size
from posixpath import split
import sys
import copy
from graphviz.graphs import Graph
import attr_types
from colorama import Fore,Back,Style
from capstone import *
from tabulate import tabulate
from graphviz import Digraph, dot
import readelf
from dfs import Graph
little_endian = False
def get_ei_class(attr):
if (attr == '01'):
return "32"
else:
return "64"
def get_ei_data(attr):
if (attr == '01'):
return "2's comp , little endian"
else:
return "2's comp , big endian"
def get_ei_version(attr):
return "current version = 1"
def get_ei_osabi(attr):
if (attr == "00"):
return "system v"
elif (attr == "01"):
return "HP-UX"
elif (attr == "02"):
return "NetBSD"
elif (attr == "03"):
return "Linux"
elif (attr == "04"):
return "GNU Hurd"
elif (attr == "06"):
return "Solaris"
elif (attr == "07"):
return "AIX"
elif (attr == "08"):
return "IRIX"
elif (attr == "09"):
return "FreeBSD"
elif (attr == "0A"):
return "Tru64"
elif (attr == "0B"):
return "Novell Modesto"
elif (attr == "0C"):
return "OpenBSD"
elif (attr == "0D"):
return "OpenVMS"
elif (attr == "0E"):
return "NonStop Kernel"
elif (attr == "0F"):
return "AROS"
elif (attr == "10"):
return "Fenix OS"
elif (attr == "11"):
return "CloudABI"
elif (attr == "12"):
return "Stratus Technologies OpenVOS"
def get_ei_abiversion(attr):
return attr
def get_ei_pad(attr):
return ''.join(attr)
def get_e_type(attr):
if (attr[0] == "00"):
return "No file type"
elif (attr[0] == "01"):
return "relocatable object file"
elif (attr[0] == "02"):
return "executable binary"
elif (attr[0] == "03"):
return "Shared object file"
elif (attr[0] == "04"):
return "Core file"
elif (attr[0] == "FE" and attr[1] == "00"):
return "Operating system-specific"
elif (attr[0] == "FE" and attr[1] == "FF"):
return "Operating system-specific"
elif (attr[0] == "FF" and attr[1] == "00"):
return "Processor-specific"
elif (attr[0] == "FF" and attr[1] == "FF"):
return "Processor-specific"
def get_e_machine(attr):
if (attr[0] == "10"):
return "WDC 65C816"
attr_to_int = int('0x'+''.join(attr[0]),16)
return attr_types.e_machines[str(attr_to_int)]
def fix_little_endian(attr):
tmp = copy.deepcopy(attr)
return tmp[::-1]
def get_e_version(attr):
if (little_endian):
version = ''.join(fix_little_endian(attr))
return hex(int(version , 16))
else:
version = ''.join(attr)
return hex(int(version , 16))
def get_e_entry(attr):
if (little_endian):
entry = ''.join(fix_little_endian(attr))
return hex(int(entry , 16))
else:
entry = ''.join(attr)
return entry
def get_e_flags(attr):
if (little_endian):
flags = ''.join(fix_little_endian(attr))
return hex(int(flags , 16))
else:
flags = ''.join(attr)
return flags
def get_e_ehsize(attr):
return int_extract(attr)
def get_e_shstrndx(attr):
return int_extract(attr)
def get_ptype(attr):
tmp = fix_little_endian(attr)
str_tmp = ''.join(tmp)
type_value = str(int(str_tmp, 16))
if (type_value in attr_types.p_types):
return attr_types.p_types[type_value]
else:
return "unknown"
def get_pflags(attr):
tmp = fix_little_endian(attr)
tmp_str = ''.join(tmp)
return attr_types.p_flags[str(int(tmp_str , 16))]
def get_poffset(attr):
tmp = fix_little_endian(attr)
tmp_str = ''.join(tmp)
return tmp_str
def get_pvaddr(attr):
tmp = fix_little_endian(attr)
tmp_str = ''.join(tmp)
return tmp_str
def get_ppaddr(attr):
tmp = fix_little_endian(attr)
tmp_str = ''.join(tmp)
return tmp_str
def get_pfilesz(attr):
tmp = fix_little_endian(attr)
tmp_str = ''.join(tmp)
return tmp_str
def get_pmemsz(attr):
tmp = fix_little_endian(attr)
tmp_str = ''.join(tmp)
return tmp_str
def get_palign(attr):
tmp = fix_little_endian(attr)
tmp_str = ''.join(tmp)
return hex(int(tmp_str ,16))
def get_sh_name(attr , f , name_entry_offset):
sh_name_ndx = attr
name = ''
if (sh_name_ndx != 0 ):
f.seek(name_entry_offset + sh_name_ndx)
while(True):
read = f.read(1)
name += ['{:02x}'.format(c) for c in read][0]
if name[-2]+name[-1] == '00':
name = name[:-2]
break
return str(bytes.fromhex(name))[2:-1]
def get_sh_type(attr):
tmp = fix_little_endian(attr)
str_tmp = ''.join(tmp)
type_value = str(int(str_tmp, 16))
if (type_value in attr_types.s_types):
return attr_types.s_types[type_value]
else:
return "unknown"
def get_sh_flags(attr):
tmp = fix_little_endian(attr)
str_tmp = ''.join(tmp)
type_value = str(int(str_tmp, 16))
if (type_value in attr_types.s_flags):
return attr_types.s_flags[type_value]
else:
return "unknown"
def get_sh_addr(attr):
tmp_addr = fix_little_endian(attr)
return ''.join(tmp_addr)
def get_sh_offset(attr):
tmp_addr = fix_little_endian(attr)
return ''.join(tmp_addr)
def get_sh_size(attr):
tmp_addr = fix_little_endian(attr)
return ''.join(tmp_addr)
def get_sh_link(attr):
return int_extract(attr)
def get_sh_info(attr):
return int_extract(attr)
def get_sh_addralign(attr):
return int_extract(attr)
def get_sh_entsize(attr):
tmp_addr = fix_little_endian(attr)
return ''.join(tmp_addr)
# for x 64
def extract_header_file_output_x64(e_header_file_info ):
file_header = dict()
file_header["ei_Magic"] = ' '.join(e_header_file_info[:16])
file_header["ei_class"] = get_ei_class(e_header_file_info[4])
file_header["ei_data"] = get_ei_data(e_header_file_info[5])
file_header["ei_version"] = get_ei_version(e_header_file_info[6])
file_header["ei_osabi"] = get_ei_osabi(e_header_file_info[7])
file_header["ei_abiversion"] = get_ei_abiversion(e_header_file_info[8])
file_header["ei_pad"] = get_ei_pad(e_header_file_info[9:16])
file_header["e_type"] = get_e_type(e_header_file_info[16:18])
file_header["e_machine"] = get_e_machine(e_header_file_info[18:20])
file_header["e_version"] = get_e_version(e_header_file_info[20:24])
file_header["e_entry"] = get_e_entry(e_header_file_info[24:32])
file_header["e_flags"] = get_e_flags(e_header_file_info[48:52])
file_header["e_ehsize"] = get_e_ehsize(e_header_file_info[52:54])
file_header["e_shstrndx"] = get_e_shstrndx(e_header_file_info[62:64])
return file_header
def extract_program_header_output_x64(e_program_header):
program_header = dict()
for index , pr_enries in enumerate(e_program_header):
program_header[str(index)] = dict()
program_header[str(index)]["p_type"] = get_ptype(pr_enries[0:4])
program_header[str(index)]["p_flags"] = get_pflags(pr_enries[4:8])
program_header[str(index)]["p_offset"] = get_poffset(pr_enries[8:16])
program_header[str(index)]["p_vaddr"] = get_pvaddr(pr_enries[16:24])
program_header[str(index)]["p_paddr"] = get_ppaddr(pr_enries[24:32])
program_header[str(index)]["p_filesz"] = get_pfilesz(pr_enries[32:40])
program_header[str(index)]["p_memsz"] = get_pmemsz(pr_enries[40:48])
program_header[str(index)]["p_align"] = get_palign(pr_enries[48:56])
return program_header
def extract_section_header_output_x64(e_section_header ,e_shstrndx , f ):
section_header = dict()
name_entry_offset = int_extract(e_section_header[e_shstrndx][24:32])
for index , s in enumerate(e_section_header):
section_header[str(index)] = dict()
tmp = int_extract(s[:4])
section_header[str(index)]["sh_name"] = get_sh_name(tmp , f , name_entry_offset)
section_header[str(index)]["sh_type"] = get_sh_type(s[4:8])
section_header[str(index)]["sh_flags"] = get_sh_flags(s[8:16])
section_header[str(index)]["sh_addr"] = get_sh_addr(s[16:24])
section_header[str(index)]["sh_offset"] = get_sh_offset(s[24:32])
section_header[str(index)]["sh_size"] = get_sh_size(s[32:40])
section_header[str(index)]["sh_link"] = get_sh_link(s[40:44])
section_header[str(index)]["sh_info"] = get_sh_info(s[44:48])
section_header[str(index)]["sh_addralign"] = get_sh_addralign(s[48:56])
section_header[str(index)]["sh_entsize"] = get_sh_entsize(s[56:64])
return section_header
def std_outx64(file_header , program_headers , section_headers , h_structur_extracted):
#start to print elf file header
print(Fore.LIGHTCYAN_EX + "ELF Header")
print(Fore.RED + "\t Magic:\0\0" + "\t\t " + file_header["ei_Magic"])
print(Fore.GREEN + "\t Class:" + "\t\t " + "ELF" + file_header["ei_class"])
print(Fore.GREEN + "\t Data:\0" + "\t\t " + file_header["ei_data"])
print(Fore.GREEN + "\t Version:" + "\t\t " + file_header["ei_version"])
print(Fore.GREEN + "\t Type : \0" + "\t\t " + file_header["e_type"])
print(Fore.GREEN + "\t OS/ABI: " + "\t\t " + file_header["ei_osabi"])
print(Fore.GREEN + "\t ABI Version: " + "\t\t " + file_header["ei_abiversion"])
print(Fore.GREEN + "\t Machine :" + "\t\t " + file_header["e_machine"])
print(Fore.GREEN + "\tVersion :" + "\t\t " + file_header["e_version"])
print(Fore.GREEN + "\t Entry point address:" + " " + file_header["e_entry"])
# structure
print(Fore.GREEN + "\t Start of program headers:" + "\t\t" + str(h_structur_extracted["e_phoff"])+ "\tBytes into file")
print(Fore.GREEN + "\t Start of section headers:" + "\t\t" + str(h_structur_extracted["e_shoff"])+ "\tBytes into file")
print(Fore.GREEN + "\t Flags:" + "\t\t" + str(file_header["e_flags"]))
print(Fore.GREEN + "\t Size of this header:" + "\t\t" + str(file_header["e_ehsize"])+ "\tBytes")
print(Fore.GREEN + "\t Size of program headers:" + "\t\t" + str(h_structur_extracted["e_phentsize"])+ "\tBytes")
print(Fore.GREEN + "\t Number of program headers: " + "\t\t" + str(h_structur_extracted["e_phnum"]))
print(Fore.GREEN + "\t Size of section headers: " + "\t\t" + str(h_structur_extracted["e_shentsize"]) + "\tBytes")
print(Fore.GREEN + "\t Number of section headers:" + "\t\t" + str(h_structur_extracted["e_shnum"]) )
print(Fore.GREEN + "\t Number of section headers table index :" + "\t\t" + str(file_header["e_shstrndx"]) )
# prog header
print("\n\n")
print( Fore.LIGHTCYAN_EX+ "Program header")
print(Fore.GREEN+ "Elf file type is " , file_header['e_type'])
print(Fore.GREEN + "entry point is " , file_header['e_entry'])
print(Fore.GREEN + "there are " , str(h_structur_extracted['e_phnum']) + "\tprogram header")
p_table = [[ 'Type', 'offset', 'VirtAddr', 'PhysAddr' , 'FileSiz' , 'MemSiz' , 'Flags' ,'Align' ] ]
for i in program_headers:
row = []
row.append(program_headers[i]["p_type"])
row.append(program_headers[i]["p_offset"])
row.append(program_headers[i]["p_vaddr"])
row.append(program_headers[i]["p_paddr"])
row.append(program_headers[i]["p_filesz"])
row.append(program_headers[i]["p_memsz"])
row.append(program_headers[i]["p_flags"])
row.append(program_headers[i]["p_align"])
p_table.append(row)
print(tabulate(p_table))
# section headers
print("\n\n")
print( Fore.LIGHTCYAN_EX+ "Section header")
print(Fore.GREEN + "there are " , str(h_structur_extracted['e_shnum']) + "\tprogram header")
s_table = [[ 'Number' , 'Name', 'Type', 'Address', 'Offset' , 'Size' , 'EntSize' , 'Flags' ,'Link' , 'Info' , 'Align'] ]
for i in section_headers:
row = []
row.append(i)
row.append(section_headers[i]["sh_name"])
row.append(section_headers[i]["sh_type"])
row.append(section_headers[i]["sh_addr"])
row.append(section_headers[i]["sh_offset"])
row.append(section_headers[i]["sh_size"])
row.append(section_headers[i]["sh_entsize"])
row.append(section_headers[i]["sh_flags"])
row.append(section_headers[i]["sh_link"])
row.append(section_headers[i]["sh_info"])
row.append(section_headers[i]["sh_addralign"])
s_table.append(row)
print(tabulate(s_table))
print("\n\n")
print("Key to Flags:W (write), A (alloc), X (execute), M (merge), S (strings), I (info),L (link order), O (extra OS processing required), G (group), T (TLS),")
def create_output_x64(e_header_file_info , h_structur_extracted , e_program_header , e_section_header , f):
file_header = dict()
file_header = extract_header_file_output_x64(e_header_file_info )
program_headers = extract_program_header_output_x64(e_program_header)
section_headers = extract_section_header_output_x64(e_section_header , file_header["e_shstrndx"] , f)
# print(program_headers)
# print(file_header)
# print(section_headers)
std_outx64(file_header , program_headers , section_headers , h_structur_extracted)
end_char = ''
# print(readsymtable(f , section_headers))
if little_endian == True:
end_char = '<'
else :
end_char = '>'
lists = []
st_tabindx = 0
relocated_list = []
dyn_symindex = 0
got_offset = 0
for i in section_headers:
lists.append(section_headers[i])
if (section_headers[i]['sh_name'] == '.strtab'):
st_tabindx = int(i)
if (section_headers[i]['sh_name'] == '.dynsym'):
dyn_symindex = int(i)
if (section_headers[i]['sh_name'] == '.got'):
got_offset = section_headers[i]['sh_addr']
symbol_table = readelf.readsymtab(f , file_header, lists , elf_class=64 ,end_char=end_char , shidx_strtab=st_tabindx )
Dynamic_relocated_list = read_dynSections(f , section_headers , symbol_table , x86_or_x64, little_endian )
relocated_list = dict()
for s in symbol_table:
for symb in s[1]:
relocated_list[symb['st_value']] = symb
nodes = []
Graphs = []
syscalls = dict()
dynamic_count = 0
for i in symbol_table:
for sym in i[1]:
if (sym['st_size'] != 0):
if ('X' in section_headers[str(sym['st_shndx'])]['sh_flags']):
f.seek(sym['st_value'])
x = f.read(sym['st_size'])
CS_mode = 0
if little_endian == True:
CS_mode = CS_MODE_LITTLE_ENDIAN
else :
CS_mode = CS_MODE_BIG_ENDIAN
md = Cs(CS_ARCH_X86, CS_MODE_32 + CS_mode)
disass_items = [*md.disasm_lite(x, sym['st_value'])]
for i, (address, size, mnemonic, op_str) in enumerate(disass_items):
# print("0x%x:\t%s\t%s" %(address, mnemonic, op_str))
if (mnemonic == 'call'):
# print('caller is : ' , sym['st_name'])
caller = sym['st_name']
if (op_str[:2] == '0x' and int(op_str,16) in relocated_list):
# print('callee is : ' , relocated_list[int(op_str, 16)]['st_name'])
if (relocated_list[int(op_str, 16)]['st_name'] != ''):
callee = relocated_list[int(op_str, 16)]['st_name']
else :
is_there , name = search_inDynamics(op_str , Dynamic_relocated_list , little_endian , x86_or_x64 , f , got_offset)
if (is_there):
callee = name
else:
callee = 'UNKNOWN'
else:
if (op_str[:2] == '0x'):
is_there , name = search_inDynamics(op_str , Dynamic_relocated_list , little_endian , x86_or_x64 , f , got_offset)
if (is_there):
callee = name
else:
callee = 'UNKNOWN' + str(op_str)
else :
callee = 'UNKNOWN' + str(op_str)
if (caller not in nodes):
nodes.append(caller)
if (callee not in nodes):
nodes.append(callee)
Graphs.append([caller , callee])
if (callee == 'syscall'):
ins = ''
x = i
while(ins != 'edi'):
x = x - 1
ins = disass_items[x][-1].split(',')[0]
syscalnum = disass_items[x][-1].split(',')[1]
syscalnum = syscalnum.split(' ')[-1]
syscalnum = int(syscalnum , 16)
if (syscalls != 0 ):
if(sym['st_name'] in syscalls):
syscalls[sym['st_name']].append(syscalnum)
else:
syscalls[sym['st_name']] = []
syscalls[sym['st_name']].append(syscalnum)
if (mnemonic == 'syscall'):
syscal_num = int(disass_items[i-1][-1].split(',')[-1].split(' ')[-1] , 16)
if (syscalls != 0 ):
if (sym['st_name'] in syscalls):
syscalls[sym['st_name']].append(syscal_num)
else:
syscalls[sym['st_name']] = []
syscalls[sym['st_name']].append(syscal_num)
nodes , Graphs = filter_Graph(nodes , Graphs )
dot_file = Digraph(name="output" + "/" + file_path)
Detect_FuncSysCallPattern(nodes , Graphs , syscalls)
print(syscalls)
dot_file.format = 'png'
# print(syscalls)
for l in nodes:
sysc = ''
try:
if (sys.argv[2] == '-s'):
sysc = ' syscalls : '
if (l in syscalls):
for i in syscalls[l]:
sysc += str(i) + " "
except:
pass
if (l == 'main'):
dot_file.node(l , l + sysc , attrs=sysc, shape='circle')
else:
dot_file.node(l , l + sysc , attrs=sysc)
for ed in Graphs:
dot_file.edge(ed[0], ed[1], label='call')
dot_file.edge(ed[1], ed[0], label='ret')
try:
dot_file.render()
except Exception as e:
pass
pass
# for x86
def extract_header_file_output_x86(e_header_file_info ):
file_header = dict()
file_header["ei_Magic"] = ' '.join(e_header_file_info[:16])
file_header["ei_class"] = get_ei_class(e_header_file_info[4])
file_header["ei_data"] = get_ei_data(e_header_file_info[5])
file_header["ei_version"] = get_ei_version(e_header_file_info[6])
file_header["ei_osabi"] = get_ei_osabi(e_header_file_info[7])
file_header["ei_abiversion"] = get_ei_abiversion(e_header_file_info[8])
file_header["ei_pad"] = get_ei_pad(e_header_file_info[9:16])
file_header["e_type"] = get_e_type(e_header_file_info[16:18])
file_header["e_machine"] = get_e_machine(e_header_file_info[18:20])
file_header["e_version"] = get_e_version(e_header_file_info[20:24])
file_header["e_entry"] = get_e_entry(e_header_file_info[24:28])
file_header["e_flags"] = get_e_flags(e_header_file_info[36:40])
file_header["e_ehsize"] = get_e_ehsize(e_header_file_info[40:42])
file_header["e_shstrndx"] = get_e_shstrndx(e_header_file_info[50:52])
return file_header
def extract_program_header_output_x86(e_program_header):
program_header = dict()
for index , pr_enries in enumerate(e_program_header):
program_header[str(index)] = dict()
program_header[str(index)]["p_type"] = get_ptype(pr_enries[0:4])
program_header[str(index)]["p_flags"] = get_pflags(pr_enries[24:28])
program_header[str(index)]["p_offset"] = get_poffset(pr_enries[4:8])
program_header[str(index)]["p_vaddr"] = get_pvaddr(pr_enries[8:12])
program_header[str(index)]["p_paddr"] = get_ppaddr(pr_enries[12:16])
program_header[str(index)]["p_filesz"] = get_pfilesz(pr_enries[16:20])
program_header[str(index)]["p_memsz"] = get_pmemsz(pr_enries[20:24])
program_header[str(index)]["p_align"] = get_palign(pr_enries[28:32])
return program_header
def extract_section_header_output_x86(e_section_header , e_shstrndx , f):
section_header = dict()
name_entry_offset = int_extract(e_section_header[e_shstrndx][16:20])
for index , s in enumerate(e_section_header):
section_header[str(index)] = dict()
tmp = int_extract(s[:4])
section_header[str(index)]["sh_name"] = get_sh_name(tmp , f , name_entry_offset)
section_header[str(index)]["sh_type"] = get_sh_type(s[4:8])
section_header[str(index)]["sh_flags"] = get_sh_flags(s[8:12])
section_header[str(index)]["sh_addr"] = get_sh_addr(s[12:16])
section_header[str(index)]["sh_offset"] = get_sh_offset(s[16:20])
section_header[str(index)]["sh_size"] = get_sh_size(s[20:24])
section_header[str(index)]["sh_link"] = get_sh_link(s[24:28])
section_header[str(index)]["sh_info"] = get_sh_info(s[28:32])
section_header[str(index)]["sh_addralign"] = get_sh_addralign(s[32:36])
section_header[str(index)]["sh_entsize"] = get_sh_entsize(s[36:40])
return section_header
def std_outx86(file_header , program_headers , section_headers):
print("1")
def get_dynsymname(offset , index , f):
dyn_name_str = offset
name = ''
if (index != 0 ):
f.seek(offset + index)
while(True):
read = f.read(1)
name += ['{:02x}'.format(c) for c in read][0]
if name[-2]+name[-1] == '00':
name = name[:-2]
break
return str(bytes.fromhex(name))[2:-1]
def read_dynSections(f , section_headers ,symbol_table , mode , little_endian ):
read_size = 0
And_Roperator = 0
Shift_Count = 0
column_size = 0
if (mode == 'x86'):
read_size = 16
Shift_Count = 8
And_Roperator = 0xFFFFFF
column_size = 4
else :
And_Roperator = 0xFFFFFFFF
Shift_Count = 32
read_size = 24
column_size = 8
dynstr_index , dyn_index , rel_dyn_index , rel_plt_index = 0 , 0 , 0 , 0
for s in section_headers:
if (section_headers[s]['sh_name'] == '.dynsym'):
dyn_index = s
if (section_headers[s]['sh_name'] == '.dynstr'):
dynstr_index = s
if (mode == 'x86' ):
if (section_headers[s]['sh_name'] == '.rel.plt'):
rel_plt_index = s
if (section_headers[s]['sh_name'] == '.rel.dyn'):
rel_dyn_index = s
if (mode == 'x64' ):
if (section_headers[s]['sh_name'] == '.rela.plt'):
rel_plt_index = s
if (section_headers[s]['sh_name'] == '.rela.dyn'):
rel_dyn_index = s
# read dyn
dyn_size = int('0x'+ ''.join(section_headers[dyn_index]['sh_size']), 16)
f.seek(int('0x'+ ''.join(section_headers[dyn_index]['sh_offset']), 16))
dyn_symbolTable = []
for symbol_data in [f.read(read_size) for _ in range(dyn_size // read_size)]:
index = symbol_data[:4]
index = ["{:02x}".format(i) for i in index]
index = int_extract(index)
name = get_dynsymname(int('0x'+ ''.join(section_headers[dynstr_index]['sh_offset']), 16) , index , f )
dyn_symbolTable.append([index , name ])
# read rel.plt
plt_table = []
plt_row_size = 8 if mode == 'x86' else 24
plt_size = int('0x'+ ''.join(section_headers[rel_plt_index]['sh_size']), 16)
f.seek(int('0x'+ ''.join(section_headers[rel_plt_index]['sh_offset']), 16))
for row in [f.read(plt_row_size) for s in range(plt_size // plt_row_size)]:
row = ["{:02x}".format(i) for i in row]
plt_offset = ''.join(fix_little_endian(row[:column_size]))
dyn_indx = (int_extract(row[column_size:]) >> Shift_Count) & And_Roperator
plt_info = int_extract(row[column_size:])
# plt_info = int_extract(row[4:]
plt_table.append([ plt_offset , plt_info , dyn_indx])
# read rel.dyn
# print(plt_table)
reldyn_table = []
reldyn_row_size = 8 if mode == 'x86' else 24
reldyn_size = int('0x'+ ''.join(section_headers[rel_dyn_index]['sh_size']), 16)
f.seek(int('0x'+ ''.join(section_headers[rel_dyn_index]['sh_offset']), 16))
for row in [f.read(reldyn_row_size) for s in range(reldyn_size // reldyn_row_size)]:
row = ["{:02x}".format(i) for i in row]
reldyn_offset = ''.join(fix_little_endian(row[:column_size]))
reldyn_indx = (int_extract(row[column_size:]) >> Shift_Count) & And_Roperator
reldyn_info = int_extract(row[column_size:])
# plt_info = int_extract(row[4:]
reldyn_table.append([ reldyn_offset , reldyn_info , reldyn_indx])
# print(reldyn_table)
# print('-----------')
# print(dyn_symbolTable)
# print(reldyn_table)
relocated_Dynamic_list = []
for i in range(len(reldyn_table)):
offset = reldyn_table[i][0]
info = reldyn_table[i][1]
name = dyn_symbolTable[reldyn_table[i][2]][1]
relocated_Dynamic_list.append([offset , info , name])
for i in range(len(plt_table)):
offset = plt_table[i][0]
info = plt_table[i][1]
name = dyn_symbolTable[plt_table[i][2]][1]
relocated_Dynamic_list.append([offset , info , name])
return relocated_Dynamic_list
def is_in_dtable(d_list , Got_called_function):
for l in d_list:
if (int('0x' + l[0] , 16) ==int(Got_called_function ,16) ):
called_func = l[2]
return called_func
def search_inDynamics(op_str , d_list , little_endian , x86_or_x64 , f , got_offset):
if (op_str[:2] == '0x'):
# print(op_str , '-----------------------')
f.seek(int(op_str , 16))
x = f.read(20)
CS_mode = 0
if little_endian == True:
CS_mode = CS_MODE_LITTLE_ENDIAN
else :
CS_mode = CS_MODE_BIG_ENDIAN
if x86_or_x64 == 'x86':
file_format = CS_MODE_32
else :
file_format = CS_MODE_64
md = Cs(CS_ARCH_X86, file_format + CS_mode)
disass_items = [*md.disasm_lite(x, int(op_str , 16))]
for i, (address, size, mnemonic, op_str) in enumerate(disass_items):
if ('jmp' in mnemonic ):
if x86_or_x64 == 'x86':
index = op_str.split('0x')[1].split(']')[0]
Got_called_function = hex(int('0x' + index , 16) + int( '0x' + got_offset , 16))
func_called = is_in_dtable(d_list , Got_called_function)
if (func_called != ''):
return True , func_called
else :
return False , func_called
# pass
else:
# print(op_str)
index = op_str.split('0x')[1].split(']')[0]
got_offset = disass_items[i+1][0]
Got_called_function = hex(int('0x' + index , 16) + got_offset)
func_called = is_in_dtable(d_list , Got_called_function)
if (func_called != ''):
return True , func_called
else :
return False , func_called
else :
return False , ''
def filter_Graph(nodes , Graphs ):
for n in nodes:
if (n == 'main'):
continue
is_called = False
for e , e2 in enumerate(Graphs):
if (e2[1] == n):
is_called = True
if (is_called == False ):
# print(n , 'should remove')
nodes.remove(n)
# print(nodes)
for l in Graphs:
if (l[0] == n):
Graphs.remove(l)
nodes.remove(l[1])
if ('UNK' in n):
nodes.remove(n)
for l in Graphs:
if (l[0] == n):
Graphs.remove(l)
nodes.remove(l[1])
if (l[1] == n):
Graphs.remove(l)
nodes.remove(l[0])
return nodes , Graphs
def Detect_FuncSysCallPattern(nodes , Graphs , syscalls):
f= open('FuncCallPattern.txt' , 'r')
pattern_count = int(f.readline())
call_patterns = []
for i in range(pattern_count):
content = f.readline()
content = content.split(' ')
call_patterns.append(content[:-1])
print( Fore.YELLOW + "*"*100 )
g = Graph()
for n1 , n2 in Graphs:
g.addEdge(n1,n2)
Traversed_DFS = g.DFS('main')
Traversed_list = g.Traversed_DFS.split('*')
success = False
for p in call_patterns:
index = 0
success = False
for t in Traversed_list:
# print(t , p[index])
if (success == True):
print(Fore.RED + "Warning : " + '-->'.join(p) + " Has been detected" )
break
# print(p[index] , t)
if ('->' in t):
if (p[index] in t.split('->')[-1]):
index += 1
if (index == len(p)):
success = True
if (success != True):
if (t == p[index]):
index+=1
if (index == len(p)):
success = True
f= open('SyscallPattern.txt' , 'r')
pattern_count = int(f.readline())
syscall_patterns = []
for i in range(pattern_count):
content = f.readline()
content = content.split(' ')
syscall_patterns.append(content[:-1])
# print(syscalls)
print( Fore.RED + "*"*100 )
for p in syscall_patterns:
index = 0
success = False
for t in Traversed_list:
# print(t , p[index])
# print(p[index],t )
if (success == True):
print(Fore.BLUE + "Warning : " + '-->'.join(p) + " Has been detected" )
break
if (success != True):
if (t in syscalls):
if (int(p[index]) in syscalls[t]):
index+=1
if (index == len(p)):
success = True
def create_output_x86(e_header_file_info , h_structur_extracted , e_program_header , e_section_header , f):
file_header = dict()
file_header = extract_header_file_output_x86(e_header_file_info )
program_headers = extract_program_header_output_x86(e_program_header)
section_headers = extract_section_header_output_x86(e_section_header , file_header["e_shstrndx"] , f)
std_outx64(file_header , program_headers , section_headers , h_structur_extracted)
end_char = ''
# print(readsymtable(f , section_headers))
if little_endian == True:
end_char = '<'
else :
end_char = '>'
lists = []
st_tabindx = 0
dyn_symindex = 0
got_offset = 0
relocated_list = []
for i in section_headers:
lists.append(section_headers[i])
if (section_headers[i]['sh_name'] == '.strtab'):
st_tabindx = int(i)
if (section_headers[i]['sh_name'] == '.dynsym'):
dyn_symindex = int(i)
if (section_headers[i]['sh_name'] == '.got'):
got_offset = section_headers[i]['sh_addr']
symbol_table = readelf.readsymtab(f , file_header, lists , elf_class=32 ,end_char=end_char , shidx_strtab=st_tabindx )
Dynamic_relocated_list = read_dynSections(f , section_headers , symbol_table , x86_or_x64, little_endian )
relocated_list = dict()
for s in symbol_table:
for symb in s[1]:
relocated_list[symb['st_value']] = symb
nodes = []
Graphs = []
syscalls = {}
dynamic_count = 0
for i in symbol_table:
for sym in i[1]:
if (sym['st_size'] != 0):
if ('X' in section_headers[str(sym['st_shndx'])]['sh_flags']):
f.seek(sym['st_value'])
x = f.read(sym['st_size'])
CS_mode = 0
if little_endian == True:
CS_mode = CS_MODE_LITTLE_ENDIAN
else :
CS_mode = CS_MODE_BIG_ENDIAN
md = Cs(CS_ARCH_X86, CS_MODE_32 + CS_mode)
disass_items = [*md.disasm_lite(x, sym['st_value'])]
for i, (address, size, mnemonic, op_str) in enumerate(disass_items):
# print("0x%x:\t%s\t%s" %(address, mnemonic, op_str))
if (mnemonic == 'call'):
# print('caller is : ' , sym['st_name'])
caller = sym['st_name']
if (op_str[:2] == '0x' and int(op_str,16) in relocated_list):
# print('callee is : ' , relocated_list[int(op_str, 16)]['st_name'])
if (relocated_list[int(op_str, 16)]['st_name'] != ''):
callee = relocated_list[int(op_str, 16)]['st_name']
else :
is_there , name = search_inDynamics(op_str , Dynamic_relocated_list , little_endian , x86_or_x64 , f , got_offset)
if (is_there):
callee = sym['st_name'] + "->" + name
else:
callee = 'UNKNOWN'
dynamic_count +=1
else:
if (op_str[:2] == '0x'):
is_there , name = search_inDynamics(op_str , Dynamic_relocated_list , little_endian , x86_or_x64 , f , got_offset)
if (is_there):
callee = name + ''
else:
callee = 'UNKNOWN\t' + str(op_str)
else :
callee = 'UNKNOWN\t' + str(op_str)
if (caller not in nodes):
nodes.append(caller)
if (callee not in nodes):
nodes.append(callee)
Graphs.append([caller , callee])
if (callee == 'syscall'):
syscalnum = disass_items[i-1][-1]
# if ('0x' in syscalnum):
syscalnum = int(syscalnum , 16)
if (sym['st_name'] in syscalls):
syscalls[sym['st_name']].append(syscalnum)
else:
syscalls[sym['st_name']] = []
syscalls[sym['st_name']].append(syscalnum)
# deetct int 0x80
if ('int' in mnemonic and '0x80' in op_str):
syscall_num =int(disass_items[i-1][3].split(',')[1].split(' ')[1] , 16)
print()
if (syscall_num != ''):
if (sym['st_name'] in syscalls):
syscalls[sym['st_name']].append(int(syscall_num))
else:
syscalls[sym['st_name']] = []
syscalls[sym['st_name']].append(int(syscall_num))
# print(Graphs)
nodes , Graphs = filter_Graph(nodes , Graphs )
# print(Graphs)
dot_file = Digraph(name="output" + "/"+file_path)
Detect_FuncSysCallPattern(nodes , Graphs , syscalls)
dot_file.format = 'png'
# print(syscalls)
for l in nodes:
sysc = ''
try:
if (sys.argv[2] == '-s'):
sysc = ' syscalls : '
if (l in syscalls):
for i in syscalls[l]:
sysc += str(i) + " "
except: