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md5_cracker.txt

md5_cracker.txt
Posted Nov 14, 2008
Authored by 0x90

Small shell script to brute force MD5 hashes.

tags | shell, cracker
SHA-256 | f87813eabb4710f5991a4f961e02c2c5687de3355ab0e7d9075d5a4268c8e7f9

md5_cracker.txt

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#!/usr/bin/env bash
# MD5 Cracker V1.0
# coded By 0x90 2008
# 0x90[at]bsdmail.org
# This small tool will bruteForce MD5 hash
# work only on FreeBSD
#
# I do not take any reponsibilty for what you do with this tool
# Hopefully it will make your life easier rather then making other
# peoples lives more difficult!
##############################
# ___ ___ ___
# / _ \ / _ \ / _ \
#| | | |_ _| (_) | | | |
#| | | \ \/ /\__, | | | |
#| |_| |> < / /| |_| |
# \___//_/\_\ /_/ \___/
##############################

echo ".:: MD5 Cracker, Coded By 0x90 ::."
echo -n "Enter MD5 Hash: "
read hash
if [ -z "$hash" ] || [ "${#hash}" != "32" ]; then
echo "Error: please Enter a valid md5 hash"
exit
fi
echo

echo -n "Select BruteForce Method:
1: Random BruteForce
2: Dictionary BruteForce
Enter your choise 1 or 2: "
read choise
if [ -z "$choise" ] || [ "$choise" != "1" ] && [ "$choise" != "2" ]; then
echo "Error: please choise between 1 or 2"
exit 1
fi
#########################
# Random BruteForce
#########################

if [ "$choise" == "1" ]; then
echo "use Random method to crack"
echo "trying to bruteforce MD5 hash ..."

echo -n "enter min lengh: "
read minlen
echo -n "enter max lengh: "
read maxlen

echo -n "Select bruteForce mode:
all, alnum, lower, upper, digit, alpha, symbols
> "
read mode

if [ "$mode" = "all" ]; then
char="a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9 ! # \$ % & \' ( ) \* + , -
. / : ; & < = > ? @ [ \\ ] ^ _ { | } ~"
fi
if [ "$mode" = "alnum" ]; then
char="a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9"
fi
if [ "$mode" = "alpha" ]; then
char="a b c d e f g h i j k l m n o p q r s t u v w x y z 0 1 2 3 4 5 6 7 8 9"
fi
if [ "$mode" = "lower" ]; then
char="a b c d e f g h i j k l m n o p q r s t u v w x y z"
fi
if [ "$mode" = "upper" ]; then
char="A B C D E F G H I J K L M N O P Q R S T U V W X Y Z"
fi
if [ "$mode" = "digit" ]; then
char="0 1 2 3 4 5 6 7 8 9"
fi
if [ "$mode" = "symbols" ]; then
char="! # \$ % & \' ( ) \* + , - . / : ; & < = > ? @ [ \\ ] ^ _ { | } ~"
fi

bf(){
for c in $char ; do

nc=$[$nc+1]
ch[$nc]=$c
done
for x in `jot - 1 $[$maxlen+1]` ; do

if [ $minlen -ge $x ] ; then
ci[$x]=1
else
ci[$x]=0
fi
done
for clen in `jot - $minlen $maxlen` ; do

while [ ${ci[$[$clen+1]]} -ne 1 ] ; do
wrd=""
for x in `jot - $clen 1` ; do
wrd=$wrd${ch[${ci[$x]}]}
done


md5_hash=`md5 -q -s "$wrd"`

echo "$wrd: hash: $md5_hash"
if [ "$md5_hash" == "$hash" ]; then
echo
echo "Cracked, MD5 password is: $wrd"
exit 0
fi
ci[1]=$[${ci[1]}+1]
for x in `jot - 1 $clen`; do
if [ ${ci[$x]} -gt $nc ] ; then
ci[$x]=1
ci[$[$x+1]]=$[${ci[$[$x+1]]}+1]
fi
done
done
done
}

bf



fi
#########################
# Dictionary BruteForce
#########################
# Cain&Abel wordlist http://www.md5this.com/Wordlist.zip
# dont forget to convert the wordlist to Unix file format
# dos2unix Wordlist.txt
if [ "$choise" == "2" ]; then
echo "use dictionary method to crack"
echo -n "Enter dictionary name: "
read dic
echo "trying to bruteforce MD5 hash ..."

n=`cat $dic | wc -l`

echo "we have $n password to try"
for (( i=1; i <= $n; i++));
do
pass=`sed -n "$i"p $dic`
md5_hash=`md5 -q -s "$pass"`

echo "$i: hash: $md5_hash"

if [ "$md5_hash" == "$hash" ]; then
echo
echo "Cracked, md5 password is: $pass"
exit 0
fi
done
fi
exit
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