I coped with character type coversion to let it looks like c type, and search bytes from
*.dll to modify it.
so, there is sth I learned and written down here.
# Binary I/O operation
def hex_read(filepath: str) -> bytearray: if os.path.isfile(filepath): with open(filepath, 'rb') as f: data = bytearray(f.read()) return data
dll_data = hex_read('D:\\test\\test.dll')
Find bytes and replace it:
index_start = dll_data.find(b'\x85\x69\xf0\x7f') index_end = index_start + 100 if index_start != -1: data_old = dll_data[index_start:index_end] data_new = replacebytes # replacebytes is the content you want to replace dll_data_new = dll_data.replace(data_old, data_new) with open('D:\\test\\test.dll', 'wb') as f: f.write(dll_data_new)