"Python" Exe2shellcode,shellcode2exe

Writing this kind of program in Python is very concise, if you don't know how many lines of code to write in C + +.

Exe2shellcode

#! /usr/bin/env python# -*- coding: utf-8 -*-import osimport sysdef payload(files):    shellcode = ""    ctr = 1    maxlen = 15 #to create rows    try:        for b in open(files, "rb").read():            shellcode +=b.encode("hex")            if ctr == maxlen:                ctr = 0            ctr += 1        print "Code length: " + str(len(shellcode))        return shellcode    except:        print "转换失败，请检查!"f = open(‘messagebox.txt‘,‘w‘)files = "messagebox.exe" a = payload(files)f.write(a)f.close()

Shellcode2exe

#! /usr/bin/env python# -*- coding: utf-8 -*-# 计算messagebox大小c = open(‘messagebox.txt‘,‘r‘)r = c.read()print len(r)# 将cmd.exe中的opcode再转换为HEX数据s = open(‘messagebox.txt‘,‘rb‘)b = s.read()bb = b[-len(r):]cb = bb.decode("hex")f = open(‘mess.exe‘,‘wb‘)f.write(cb)

Reference

Discussion on the concept of decomposition type backdoor
https://mp.weixin.qq.com/s/KLR2s9PkHqy97eZjYTeM2w

"Python" Exe2shellcode,shellcode2exe