
Security Vulnerability Coach, responsible for @x41sec and @persistent_psi Tweets here are my own.
Right here
Joined January 2009
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Reality check your defenses! POC collection of the Month-of-Bypasses: github.com/persistent-securi…
Markus Vervier retweeted
Loved catching up with old friends and making new ones at @_c0c0n_ 2026!
Getting such a warm welcome from Kerala Police was a highlight, along with @marver's training session.
Big thanks to the organizers, volunteers and speakers for a great event 👋
#c0c0n2026 #cybersecurity
Wow I really managed to look like the evil red team guy in this one! 😈
A month ago I rented an Irish Bar and hosted an AI security panel + speakeasy. Here is the 35min panel youtu.be/ShMq_vH44LU
Lots of fun content here.. I've gotta put more of these on the books.
With Uber and friends we traded conversations with drivers all over the world for lower risk of being scammed and ease of use.
Markus Vervier retweeted
Qwen3-0.6B running happily in a bare metal Go TamaGo microVM and writing a haiku about it.
This is on pure CPU with GOEXPERIMENT=simd on.
Qwen3.8-27B also runs (slower) if you have enough RAM.
I just need a bare metal Go GPU driver now...
Markus Vervier retweeted
🎉
PDF direct link here archives.phrack.org/dl/73/th…
Zip's (team-teso) long lost ssh1-crc32 exploit was found (xt 😘), (PLUS hellkit, 7350statd, 7350qpopper, icmp-tunnel, shellcode, lkm-work, and much more).
🚰 LEAKING phrack 73 article NOW (@phrack ):
github.com/hackerschoice/tea…
🤘🤘🤘
Markus Vervier retweeted
One more Phrack 73 leak for you!
Blueboxing Myths and Feelings: a nostalgic dive into phone phreaking’s golden age.
archives.phrack.org/dl/73/bl…
by @hackerschoice and @GammaTHC
On my way to #c0c0n2026 where I will give a training on building AI tools for security. Thanks for having me @_c0c0n_ !
Markus Vervier retweeted
Signal security, theory vs reality:
you've got PQ-e2ee and forward secrecy and post-compromise security and secure contact discovery and key transparency and PIN protection etc. and you use a fully patched burner phone so you feel so secure and confident when you send that message in the wrong convo and only notice it hours later—not even kidding, much greater a risk than post-compromise etc., should have a local classifier that tells you "are you sure?" when a dissonance is found
Markus Vervier retweeted
The TL;DR of what Anthropic just said:
1.) GLM-5.3 is as good as Mythos for exploit development.
2.) Unlike Claude, GLM-5.3 gives you the results you pay for.
3.) Governments should ban AI models which are as good as theirs but are not made by them.
The funniest part is how Anthropic admitted self-reflectively that the lack of guardrails may actually be benefiting the defenders working to secure their systems. 🤪
Something they never wanted to allow, because of possible misuse.
I don't get it, but I feel Anthropic should at least put a note at the very bottom if they are doing paid advertising to promote GLM-5.3. 😜
Source:
anthropic.com/research/glm-5…
The audacity of OpenAI bike-shedding about a bug bounty, while they’ve had 50.000 of their own agents marauding through other people’s infrastructure.
fwiw, i’m going to stop talking about the openai thing. we made our points pretty clearly, one final note.
to hackers:
1. most serious companies will receive good-faith research like this gracefully and treat you well. they don’t question your intent or threaten you, they look at your profile, your history, and the work itself, and that usually estables bridge quiet quickly.
2. yes, some of the "old and outdated people who are not following the state of vdp," as someone put it, are right about the risky waters.
don’t randomly test every company, stick to top companies. nd yes, they are right about pivoting too, opening pr is one thing, cloning openai’s source code or exfiling ci secrets and starting to hunt for model weights would obviously be a crazy step too far.
3. have your own disclosure policy, i will attach down below ours, 30/90 days, whatever you believe is reasonable. personally, i wouldn’t sell my sole or sell away control of my research for money, being able to show your work publicly goes very far.
you can call that chasing fame. i call it keeping my agency over my own work and proudly showing people what we built.
4. when you choose to publish, understand that publication is opposite of what a ciso wants, occasionally people will become antagonistic.
try to talk sense into them, a vdp does not have to become an embarrassing story, it can become a great one.
case in point, google cloud had nasty bugs disclosed publicly all the time, researchers wrote detailed posts about them, and google celebrates security research every year, highlights top bugs, and has people like @LiveOverflow make videos about them.
Hacking into Google's Network for $133,337:
youtube.com/watch?v=g-JgA1hv…
StubZero: $148,337 RCE in Google Cloud Production
brutecat.com/articles/google…
---
to security leaders:
1. please, you don’t need to be asinine.
2. researchers are doing something useful for society and for your company, even when they also have their own interests
3. treat them well, learn from google or meta, vulnerability research works best as a collaboration, not a threatening relationship
Markus Vervier retweeted
Your weekend reading assignment has arrived early.
A first taste of the upcoming, still-under-wraps Phrack 73: “THE PROXY THAT MADE NO SENSE” by @mikko.
archives.phrack.org/dl/73/th…
Glad I could do some thought leadering about AI! While everyone is focused on AI finding bugs, we tend to loose track of the process. Which leads to new exploits!
🔥THE ENERGY IS STILL HIGH!
@marver took the stage with:“The Singularity Doesn’t Care About Leaking Your Data: From Prompt Injection to Posthuman Recon-A Field Report on Attacking AI in 2026.”🤖A fascinating deep dive into attacking AI & the perfect pairing with beers & red wine!
Markus Vervier retweeted
🔥THE ENERGY IS STILL HIGH!
@marver took the stage with:“The Singularity Doesn’t Care About Leaking Your Data: From Prompt Injection to Posthuman Recon-A Field Report on Attacking AI in 2026.”🤖A fascinating deep dive into attacking AI & the perfect pairing with beers & red wine!
On my way to Singapore for @offbyoneconf where I will speak about my experiences and research about AI in security (more info in the responses!)
I learned so much in the last two years about the implications of AI for security, both as target for attacks and as tool to hunt bugs and testing infrastructure - and as a distraction and dilution that poses dangers as well!
Markus Vervier retweeted
🧐If you’ve been holding off an AI-driven security testing because of strict compliance, we get it!
🥳Introducing Nemesis’s On-Prem Local AI, you can run continuous attack simulations powered by a custom model hosted entirely on your systems.
#LocalAI #EUSecurity #ThreatToTest

























