Elektrine
EN
Log in Register
Paige Chat Timeline Communities Gallery Videos Email DNS VPN Uptime Kairo
Back to Timeline
Remote

cryptax

@cryptax@mastodon.social
mastodon 4.7.0-beta.1
  • Open on mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF.
This account does not represent my employer.

0 Followers
0 Following
36 Posts
Joined October 30, 2022

Posts

Open post
cryptax
cryptax @cryptax@mastodon.social · Jul 30, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Je cherche un réparateur de confiance pour mon hautbois, proche des Alpes Maritimes (06). Il a ~50 ans, et besoin de révision. Je sais expliquer les problèmes (mais pas les résoudre lol). J'ai cherché jusqu'ici sans succès. Je cherche qqun d'honnête, qui sait comment réparer un hautbois (pas qqun qui révise un hautbois tous les 5 ans). Re-post bienvenu. #alpes-maritimes #hautbois #luthier #vent #bois #musique #reparation #oboe #repair
0
0
22
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Jul 28, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Currently decompiling LabubaRAT with Ghidra. It's taking ages to perform the initial analyzing, probably because of Rust. https://blackpointcyber.com/blog/labubarat-a-rust-based-remote-access-tool-masquerading-as-nvidia-software/ #malware #rust #RAT #labubaRAT
0
0
1
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Jul 28, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Replying to @cryptax@mastodon.social
If you really insist on "creating malware for science", please pay attention to contain it (air-gapped, strict container), use a void payload (no impact) and present your research in closed conferences with no picture and no recording. But again, please don't. Use your intelligence to fight malware. It's very interesting too, and it requires lots of brains and skills! Want to prove your value? Far more efficient. Don't give in the dark side ;P 4/4
0
0
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Jul 28, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Replying to @cryptax@mastodon.social
By the way, I personally enjoy this "community service" part of my job : combating malware, and helping - a bit - the population gives sense to my work. I know that some researchers and hackers will argue that "it's good to know how to create malware for science", to learn to fight it more efficiently. I believe there are more secure way to do so. Do you spread the plague to test how efficiently your vaccine works? No. Same for malware. #malware #creation #ethics 3/4
0
1
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Jul 28, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Replying to @cryptax@mastodon.social
Submitting such a paper is just IRRESPONSIBLE. We, malware analysts and other anti-malware jobs, spend hours trying to secure lives / money of your family, friends, colleagues, companies. Trying to help malware authors feels like spitting on our jobs. Or shooting in your leg. To correlate it to current events in France, it's just like lighting a fire in front of fire-fighters. Will you tell people who lost their house, their life that it's fun to "try"? #malware #paper #research #ethics 2/4
0
2
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Jul 28, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
I've just been reviewing a paper that explains how to create malware more or less automatically. I won't get into the details of how nor which conference as it's confidential. It's not the first time I review such papers, and I want you to know, that if I am in the review board, such a submission will never get accepted whatsoever. I strongly feel against it. Android malware alone, we have between 6,000 and 10,000 new samples PER DAY. Do you really think we need more? #ethics #malware 1/4
0
1
2
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Jul 26, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Sunday morning, and currently fixing an unhappy update on Linux Mint 22.3 yesterday. To my understanding, Mint is not the cause, but it's the Nvidia drivers which were not rebuilt and signed (Secure Boot) correctly. Fortunately, ChatGPT is helping me out here or this would have been a horrible mess... :( #linux #nvidia #dkms #secureboot
1
1
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Jun 19, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
The badge for THCon2026, a DVID board, had 2 firmware : the conference firmware, which was reversed by @virtualabs@mamot.fr here: https://virtualabs.fr/geekeries/thcon26-badge-writeup and a challenge firmeware here: https://github.com/dvid-security/dvidv2-opensource/tree/main/workshop/thcon2026 That I solved here: https://cryptax.github.io/2026-06-thconbadge/ (writeup/spoiler). #badge #hacking #challenge #ESP32 #thcon #writeup #spoiler
8
1
5
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Jun 01, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

My CTF team at Auvergn'hack was fabulous. We had awesome discussions about Java, Python, security in general, but also Saint Nectaire and French pastry.

Thanks to my team mates, and again thanks so much for the Saint Nectaire.

Write-up for the Crypto challenge: https://cryptax.github.io/auvergn2026-crypto/

0
0
1
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Jun 01, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

Last Friday, I was at Auvergn'hack, a small single-tracked conference in the middle of France.

A very friendly atmosphere, beautiful weather, great venue, and several very interesting talks.

https://cryptax.github.io/posts/auvergnhack-2026/

0
0
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · May 29, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

Learning about Landlock with a sandboxed opencode in nono. Nono is a sandbox, uses Landlock, and for example we can restrict directories opencode can go into.

#auvergnhack #landlock #sekoia

0
1
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · May 28, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

https://geohot.github.io/blog/jekyll/update/2026/05/24/the-eternal-sloptember.html

Interesting point of view. I don't agree with all of it, but lots.

"the adoption of AI agents into software development will be one of the most costly mistakes in the field’s history." --> Disagree (anyway, it's done).

"Agents cannot program" --> yes and no. Agents are worse than a good software engineer, but far better than a bad one.

2
1
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · May 21, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

Mounted my first Luksbox, protected by a Yubikey. Works very well.

Compared to Gocryptfs: you have support for FIDO2 keys.

Compared to veracrypt and truecrypt, the big advantage is you don't have to reserve x Gb for the encrypted partition.

#luks #encrypted #partition #volume #fido #crypt #file #linux

cc: @Penthertz@infosec.exchange

24
2
12
0
Open post
cryptax
cryptax @cryptax@mastodon.social · May 21, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

Ca me "tue" le nombre grandissant de services avec une facturation "floue":

- souscription mensuelle à de l'IA : je ne vois aucun contrat, garantie de service. Par ex, pour Warp, ils ont essayé de me prélever mensuellement alors que je n'ai pas souvenir d'avoir signé pour une souscription mensuelle, juste que je voulais essayer un mois. Nuance.

- supermarchés où on te donne de moins en moins ta facture.

- etc

Vous avez trop d'argent, vous voulez plus regarder ce qu'on vous facture ?

1
1
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · May 19, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

FYI, I updated my blog post on CTFs and AI, because I wasn't entirely satisfied with what was in it + people press me for my opinion... so I added it.

https://cryptax.github.io/posts/ctf-ai/

Want it brielfly?

4
0
2
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Apr 30, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Replying to @pancake@infosec.exchange
@pancake@infosec.exchange I'm not sure NetBSD or FreeBSD are really more secure, just less targeted, and yes probably less features. If you do shift, let me know how it goes!
0
0
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Apr 30, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Replying to @cryptax@mastodon.social

BTW, don't run the exploit without understanding, in particular, you should backup your su. Something with cp -a su su.orig.

You'll see the exploit is devastating, because it gets rid of the password protection, but you don't see anything on the disk : the binary looks the same, original size, original date.

1
0
1
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Apr 30, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

Devastating privilege escalation on Linux: https://copy.fail/

Explanation: https://xint.io/blog/copy-fail-linux-distributions

Implementation in Go: https://github.com/badsectorlabs/copyfail-go

... and I learned today that there are AF_ALG socket types, to access cryptographic functions of the kernel.

#Linux #CVE-2026-31431 #crypto #AF_ALG

Copy Fail — 732 Bytes to Root
Xint

Copy Fail — 732 Bytes to Root

CVE-2026-31431. 100% Reliable Linux LPE — no race, no per-distro offsets, page-cache write that bypasses on-disk file-integrity tools and crosses containers. Found by Xint Code.

10
5
6
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Mar 25, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Replying to @davidrevoy@framapiaf.org
@davidrevoy excellent !
1
0
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Mar 17, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

Y a qqun qui me dit demande si j'ai du temps pour discuter avec lui sur un sujet.

Ma réponse est "non désolée, pas avant la fin de la semaine prochaine".

Et il insiste "je dois rendre ma réponse vendredi".

Certes. Mais qu'est-ce qui n'est pas suffisamment précis dans le "non" et "pas avant la fin de la semaine prochaine" ? ;-)

NB. Je fais rarement ce genre de réponses.

1
0
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Mar 15, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

RE: @laluka@infosec.exchange

Ph0wn CTF Social Challenge. So many awesome submissions, I enjoyed seeing them all, and this one is particularly excellent :)

#ph0wn

0
0
1
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Mar 09, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

Je ne savais pas que Cline, dans VS, était capable d'ouvrir un navigateur et d'aller cliquer là où il faut se loguer et faire les taches demandées. Wow.

#IA

mastodon.social

Mastodon

1
0
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Mar 04, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

Il n'y avait pas de lumière dans ces toilettes. Je suppose que là, c'était parce que c'est inutile aux malvoyants ?

#humour

mastodon.social

Mastodon

0
0
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Mar 02, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

@davbucci@mastodon.sdf.org --> @ghspacefr@infosec.exchange peut être ?

1
4
1
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Feb 20, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

https://www.welivesecurity.com/en/eset-research/promptspy-ushers-in-era-android-threats-using-genai/

#Android #malware #AI

1
0
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Feb 19, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

Je viens de passer ~1 jour à avoir un environnement de développement stable avec Android Studio. Entre toutes les horreurs de gradle, de dependancies bizarre, d'émulateur qui était trop lent etc.

Makefile, c'était pas parfait, mais au moins c'était bien scriptable et compact. Là, je continue à pester contre ces nouveautés qui n'améliorent au final rien.

#jaimeraler #frustration #android

3
0
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Feb 18, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

Message privé: bisous maman !

#24ans #heaven

0
0
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Feb 04, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Replying to @davidrevoy@framapiaf.org
@davidrevoy@framapiaf.org @thematic@mastodon.green this is gold mine!!!
3
0
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Feb 04, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Replying to @davidrevoy@framapiaf.org
@davidrevoy@framapiaf.org @thematic@mastodon.green thanks! Very interesting!
1
0
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Feb 04, 2026
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Replying to @davidrevoy@framapiaf.org
@davidrevoy@framapiaf.org amazing! But I'm surprised you put in the text first, image after! I do it the other way, but I'm a real amateur, so maybe actually what I do is stupid!
1
1
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Nov 25, 2025
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Replying to @gynvael@infosec.exchange
@gynvael@infosec.exchange @PagedOut@infosec.exchange oh you didn't manage to grab one at BlackAlps?
1
1
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Nov 24, 2025
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

Retrieved a printed copy of PagedOut at BlackAlps! Awesome! Nice to read, good paper quality and colors :)

@PagedOut@infosec.exchange

0
3
2
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Oct 23, 2025
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Replying to @claushoumann@mastodon.social
@claushoumann lol! But now, I do understand organizers: when this happens in your venue, you feel a bit responsible, and it can jeopardize the fact that the event wants to host you next year. So, yes, have fun, but put it back.
1
1
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Oct 06, 2025
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social

RE: @PagedOut@infosec.exchange

PagedOut #7 is out. I recomment page 66 ;-)

#linux #trigona #ransomware #r2ai

0
0
3
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Aug 02, 2024
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Replying to @radareorg@infosec.exchange
@radareorg what a pity that I can't be there!
0
2
0
0
Open post
cryptax
cryptax @cryptax@mastodon.social · Sep 12, 2023
cryptax
@cryptax@mastodon.social

Anti-Virus Researcher (Mobile, IoT) and Lead organizer of Ph0wn CTF. This account does not represent my employer.

mastodon.social
Replying to @Azeria@mastodon.social
@Azeria@mastodon.social wow!!!!!!!!
1
0
0
0

Remote instance

mastodon.social
Open on original server

Media

313k7r1n3
Elektrine

Tor hidden service

elekhj7afj4qnrr4yd3bkzslsyo5jgfxw3orgjkhlcxifueodybyiiad.onion

Platform

  • Email
  • Chat
  • Timeline
  • Communities
  • VPN
  • DNS

Company

  • About
  • Contact
  • FAQ

Legal

  • Terms of Service
  • Privacy Policy
  • Warrant Canary
  • Lite (no JS)
  • VPN Policy
  • Source code

Support

  • support@elektrine.com
  • Report Security Issue
Mail client setup IMAP mail.elektrine.com:993 POP3 mail.elektrine.com:995 SMTP mail.elektrine.com:465
© 2026 Elektrine. All rights reserved. Server: 20:59:38 UTC