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Crack The Hash Level 2 - Write-up - TryHackMe

noraj (Alexandre ZANNI)
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Information

Room#

  • Name: Crack The Hash Level 2
  • Profile: tryhackme.com
  • Difficulty: Medium
  • Description: Advanced cracking hashes challenges and wordlist generation

Crack The Hash Level 2

Write-up

Overview#

Install tools used in this WU on BlackArch Linux:

$ sudo pacman -S john wordlistctl mentalist lyricpass cewl haiti ttpassgen

John the ripper rules:

[List.Rules:norajCommon01]
c$[0-9]$[0-9]$[$%&*-_+=#@~!]

[List.Rules:norajCommon02]
c$1$2$3$4$[$%&*-_+=#@~!]

[List.Rules:norajCommon03]
r

[List.Rules:norajCommon04]
d
dd
ddd
dddd

Task 6 - It's time to crack hashes#

Hash 1 - English male name - f76a69033cc94d1fb3b2122becf46828 (MD5)#

Border mutation - commonly used combinations of digits and special symbols can be added at the end or at the beginning, or both

$ john hash.txt --format=raw-md5 --wordlist=/usr/share/wordlists/misc/top_1000_usa_malenames_english.txt --rules=norajCommon02

Hash 2 - English female name - 01bf0eb071a40ba731ccb3cb47319375 (MD5)#

Border mutation - commonly used combinations of digits and special symbols can be added at the end or at the beginning, or both

$ john hash.txt --format=raw-md5 --wordlist=/usr/share/wordlists/misc/top_1000_usa_femalenames_english.txt --rules=norajCommon01

Hash 3 - Town name of Mexico - 8ebe45d61ef53c7d748b80c592436e23 (MD5)#

Freak mutation - letters are replaced with similarly looking special symbols

$ cat /usr/share/wordlists/misc/city-state-country.txt | dos2unix | rg 'Mexico$' | cut -f 1 -d ',' | uniq > mexico.txt

Then with mentalist or by any other mean, substitute some letters into leet, eg a -> @ or o -> 0.

Then use the generated dict with John.

$ john hash.txt --format=raw-md5 --wordlist=mentalist.txt

Hash 4 - Own name - 1f474c6dadb3cb2370f6cb88d4576ede0db9ff43 (SHA1)#

Case mutation - the program checks all variations of uppercase/lowercase letters for any character

Build a short dictionary with the guy name:

david
guettapan
davidguettapan

Then use john with a case permutation rule:

$ john hash.txt --format=raw-sha1 --wordlist=david.txt --rules=NT --fork=3

Hash 5 - Lyrics - 140d61a5ecbe4dc82b61d68c8fc05e42 (MD5)#

Order mutation - character order is reversed

Adele

Generate wordlist of her songs.

$ lyricpass -a adele
$ cat raw-lyrics-2021-01-13-23.59.48 > adele.txt

Then use the lyrics list and a reverse mutation rule:

$ john hash.txt --format=raw-md5 --wordlist=adele.txt --rules=norajCommon03 --fork=3

Hash 6 - Phone number - a6319095c2cff7ffb0f3d5e930e902f3 (MD5)#

No mutations

https://en.wikipedia.org/wiki/List_of_mobile_telephone_prefixes_by_country

Sint Maarten: +1 and 721 prefix for mobile phone number

Modify prefix.txt and python pnwgen.py (https://github.com/toxydose/pnwgen) or do it with your own script.

$ python pnwgen.py +1721 '' 7

Then use the list with john:

$ john hash.txt --format=raw-md5 --wordlist=/tmp/pnwgen/wordlist.txt

Hash 7 - Rockyou - 7f921bcacce131426fc5111e664feb80f509796299a764dfbfb834cd97ce3217ca8015f699bdb517ed913aac3e207cf5b566859470ce7dea33ec5cea30603fb0 (SHA3-512)#

No mutations

SHA3

$ john hash.txt --format=raw-sha3 --wordlist=/usr/share/wordlists/passwords/rockyou.txt --fork=3

Hash 8 - Web scrapping - 9eb3430dc236ec9d3d5cfc6c3390523fc498037bb3de7d7e58254f7e253307a8d102b374713f425eaf1e71f33d3de9094b6a205b78510c9c3b754107a3b09c53 (blake2)#

Repetition (4)

$ git clone https://github.com/digininja/CeWL.git
$ cd CeWL
$ bundle install --path vendor
$ bundle exec cewl.rb -d 0 -w $(pwd)/rtfm.txt https://rtfm.re/en/sponsors/index.html
$ john --format=Raw-Blake2 hash.txt --wordlist=/tmp/CeWL/rtfm.txt --rules=norajCommon04

Hash 9 - Rockyou - $6$norajPass$rQe8.6rPhZcivym.tpPacR2u360yUZBKTuXbXIJ/zKrzhC4v4eayiNfW/HlcaFVkmVh7Hps5Rupc3ZINTwhmL1 (SHA512-crypt)#

No mutations

$ john --format=sha512crypt hash.txt --wordlist=/usr/share/wordlists/passwords/rockyou.txt --show
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