So much cracking.

-rw------- 1 patpro patpro 71G apr 30 16:44 john.log

#password #jtr #johntheripper

À chaque fois que je me sers d’une IA générative pour démontrer que ça ne marche pas, l’expérience prouve que j’ai raison.
100% de réussite avec une IAgen. Tout le monde ne peut pas en dire autant.

Ce midi je voulais évaluer les assertions de https://blog.gitguardian.com/the-bot-fingerprint-detecting-llm-passwords/ sur des modèles locaux.

J’ai donc lancé à l’arrache un modèle local gemma3:4b et je lui ai envoyé la requête suivante :

génère 200 mots de passe de 12 caractères minimum

C’est pas dur, même un enfant de 6 ans sait que 200 c’est beaucoup. C’est plus que tous ses doigts et tous ses orteils.
Pas gemma3:4b :

Voici 20 mots de passe de 12 caractères minimum, générés aléatoirement et conçus pour être difficiles à deviner :
(liste de 20 mots de passe pourris)

Alors je me démonte pas, je copie-colle mon prompt pour réitérer ma requête sans rien changer :

génère 200 mots de passe de 12 caractères minimum

Le machin écrit en réponse :

Okay, here are 200 passwords, each 12 characters or longer, generated randomly.
(liste de 200 mdp encore plus pourris)

Entre les 2 requêtes identiques gemma3:4b a appris à compter jusqu’à 200 et a décidé que c’est mieux de formuler la réponse en anglais.

Non, vraiment, jamais déçu par ces merdes :)

Maintenant je vais donner tout ça à John pour qu’il calcule à partir de tout ça les fichiers nécessaires à une attaque de mots de passe par chaînes de Markov.

#iagen #markov #johntheripper #jtr

(edit: typo)

The Bot Left a Fingerprint: Detecting and Attributing LLM-Generated Passwords

LLMs leave statistical fingerprints in the passwords they generate. We built a 100-year-old model to find them and detected 28,000 in the wild.

GitGuardian Blog - Take Control of Your Secrets Security
FOSS Advent Calendar - Door 6: Cracking Passwords with John the Ripper

Today we explore John the Ripper, one of the most powerful and flexible open-source password-cracking tools. It is widely used for security testing, digital forensics, and understanding how weak passwords can be recovered.

John works by taking a password hash and trying to recover the original password. It can do this in different ways, for example through brute force, where every possible combination is tried, or through wordlists, where John tests passwords from a predefined dictionary. When the generated hash matches the original, the password is revealed.

This tool is perfect for learning about cybersecurity, testing the strength of your own passwords, or experimenting with how attackers might attempt to crack weak credentials.

Pro tip: try using both brute force and a wordlist. You’ll immediately see how effective wordlists can be compared to testing every combination.

Which hashing algorithm gives you the most headaches?

Link: https://github.com/openwall/john

#FOSS #OpenSource #Linux #CLI #Terminal #JohnTheRipper #CyberSecurity #PasswordCracking #SecurityTools #HashCracking #Pentesting #EthicalHacking #DigitalForensics #Unix #Infosec #NerdContent #TechNerds #AdventCalendar #OpenTools #FOSSAdvent #adventkalender #adventskalender

Did you know, John the Ripper can use hashcat rules?

Unlike hashcat’s simple -r flag, JtR requires some manual setup in a conf file. @freeroute posted a step-by-step guide explaining how to do this.

https://forum.hashpwn.net/post/2718

#jtr #john #JohnTheRipper #hashcat #rules #hashcracking #infosec #howto #hashpwn

Trying to beat #johntheripper  on scrypt ​

Found a trick that got me 113c/s over 76c/s

After seeing yescrypt hashes appear in CMIYC a while back, I started developing a yescrypt cracker in pure Go. Since then, yescrypt has become the default /etc/shadow hash for many popular linux distros such as Debian, Ubuntu, RHEL, Fedora, and Arch (to name a few), but hash cracking support for this algo has been limited to JtR -- until now.

Here's a sneak peek of the yescrypt_cracker POC:

https://forum.hashpwn.net/post/446

#yescrypt #hashcracking #cyclone #hashpwn #hashcat #cmiyc #jtr #johntheripper #golang

1236 emails envoyés à autant d’utilisateurisses dont j’ai pu casser le mot de passe lors d’un audit.
Si tout se passe bien, demain j’aurais de la lecture.

#hashcat #JohnTheRipper #motdepasse #RSSI

A CMD script to crack password protected ZIP, RAR, 7z and PDF files, using JohnTheRipper.

https://github.com/illsk1lls/ZipRipper

#zipcrack #password #passwordcracking #JohnTheRipper

GitHub - illsk1lls/ZipRipper: A CMD script to crack password protected ZIP, RAR, 7z and PDF files, using JohnTheRipper.

A CMD script to crack password protected ZIP, RAR, 7z and PDF files, using JohnTheRipper. - illsk1lls/ZipRipper

GitHub
Custom Rules in John the Ripper: Enhancing Password Cracking - Deniz Halil

Learn how to write custom rules in John the Ripper to enhance password cracking. Unlock the power of JtR for complex password hashes and advanced security measures.

Deniz Halil
Or you can bug #chatgpt for my #bowlroll pass lol

It cracked it as soon a I told it about just the hint.

You could also #bruteforce the #pass with #johntheripper