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processor.py
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processor.py
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from injector import *
from convertor import *
import struct
def process_x64(filename, func_rva : list, load_base):
buffer = open('runtime_x64.bin', 'rb').read()
global_info = {}
convertor = CodeConverter(filename, load_base)
print('[-] translating function bytecodes...')
offset_ptr = 0
for rva in func_rva:
print('[+] - processing function: ' + hex(rva + load_base))
convertor.process(rva + load_base)
opcodes = convertor.get_opcode()
global_info[rva + load_base] = (offset_ptr, convertor.get_func_graph())
buffer += opcodes
offset_ptr += len(opcodes)
print('[-] building runtime codes')
vm_entry = inject_data_to_section(filename, filename + '.out', b'.vmp', buffer)
print('[-] patching functions..')
for rva in func_rva:
entry_code1 = b'\x48\x89\x64\x24\xF8\x48\x83\xEC\x08\xE8\x00\x00\x00\x00\x48\x83\x2C\x24\x0E\x48\xC7\x44\x24\xF8'
entry_code2 = b'\x48\x83\xEC\x08\xE9'
opcode_offset = struct.pack('I', global_info[rva + load_base][0])
jump_stub0 = entry_code1 + opcode_offset + entry_code2
jump_rva = rva + len(jump_stub0) - 1
jump_offset = struct.pack('i', vm_entry - jump_rva - 5)
jump_stub = jump_stub0 + jump_offset
cfg = global_info[rva + load_base][1]
patched_size = 0
for n in cfg.nodes():
patch_bytes(filename + '.out', filename + '.out', n.addr - load_base, b'\xCC' * n.original_size)
patched_size += n.original_size
assert len(jump_stub) <= patched_size
patch_bytes(filename + '.out', filename + '.out', rva, jump_stub)
print('[!] Done')
process_x64('.\\example\\rc4.exe', [0x1560], 0x400000)