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Stefan Beyer

@sbeyer@ioc.exchange
mastodon 4.7.0-alpha.2+glitch
  • Open on ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

0 Followers
0 Following
25 Posts
Joined April 27, 2022
LinkedIn:
https://www.linkedin.com/in/beyerstefan/
Company website:
https://www.threatint.eu
Codeberg:
https://codeberg.org/threatint

Posts

Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Jul 31, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @EricAlper@mastodon.social
@EricAlper@mastodon.social You seem like a teenager to me. People who used to boot CP/M from a floppy, or who later had to change the disk the moment the linker for the Aztec C started up, might be old.
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Jul 29, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @briankrebs@infosec.exchange
@briankrebs@infosec.exchange Nature calling :-)
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Jul 29, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
OK. Well-written malware. I get that. But am I the only one who’s surprised that Telnet is still running anywhere at all, and that this is what made the compromise possible in the first place? Sure. It was a honeypot. But the developers of this malware aren’t just targeting honeypots; they’re also after ‘real’ systems. If only someone would develop something like VPNs. https://www.nozominetworks.com/blog/tengu-a-modernized-mirai-that-doesnt-want-to-leave #mirai #malware #wtf #iot #linux #telnet
www.nozominetworks.com

Tengu: A Modernized Mirai That Doesn’t Want to Leave

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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Jul 28, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Die Autokorrektur. https://www.alles-bekloppte.de/replace-with-schutzenberger/ #fun #funny #fail
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Jul 26, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Ihre Cybersicherheits-News 20.-26. Juli 2026. In 60 Sekunden. Die Website der Nextcloud ist offline, gehen Sie weiter, es ist nichts passiert, ein Modell von OpenAI hackt Hugging Face. https://www.60-sekunden-cyber.de/kw30-2026/ #cyber #cybersicherheit #itsicherheit #itsecurity #infosec
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Jul 26, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to on social.darc.de
@DL7TNY@social.darc.de Wir haben fast alles unsere Dienste bei europäischen Anbietern und sind zufrieden - die Situation ist IMHO gar nicht so schlecht. Worüber ich mich wundere, wir bleiben bei meinem Beispiel mit Hetzern, wie so ein großes Problem ("may lead to timeouts" ist nicht ehrlich!) über sechs Monate lang bestehen bleibt und sich, zumindest nach meiner Beobachtung eher ausweitet! Da bin ich dann auch raus... Ich bin aber schon viel zu lange in der IT, darüber rege ich mich komplett GAR NICHT auf. SCHÖNEN SONNTAG! ;-)
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Jul 26, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @DL7TNY@social.darc.de
@DL7TNY@social.darc.de Falls Du von #Hetzner sprichts ... Ich bin komplett bei Dir! Wir hatten mehrere Buckets bei Hetzner, Performance und Zuverlässigkeit über Monate hinweg gut, keine Probleme im produktiven Betrieb. Gefühlt parallel mit der ersten Ankündigung von höheren Preisen wegen AI gab es die ersten Probleme mit der Performance, Timeouts, der produktive Betrieb wurde problematischer. Wir haben vor vielleicht vier Wochen unser S3 komplett von dort wegmigriert, es ging einfach nicht mehr! Wenn man sich in der Konsole anmeldet, bekommt man seit langer, langer Zeit die im Bild gezeigte Meldung. Unter https://status.hetzner.com/incident/ebd62173-d902-4e75-939a-265c0b3f1ddb kann man dann sehen, dass die Probleme sogar schon im Januar angefangen haben.
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Jul 14, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
That’s either just a generic statement designed to get me interested, or TechSmith isn’t adhering to the settings under Data & Privacy. Which one is it? #g2 #techsmith #snagit #dataprivacy
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Jul 11, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @malwarejake@infosec.exchange
I think you’re going about it the wrong way! You should really give Copilot a proper telling-off. You could, for example, call Copilot worse than a locally running model from three years ago. That’ll really get to him her it.
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Jul 05, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Es gibt Angebote, die passen so gut zusammen, da muss man einfach ... schnell weiterklicken!!!!1! ! https://www.alles-bekloppte.de/2x-boxershort-gratis/ #pizza #angebot #lieferando #boxershorts #fun #funny #wtf
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Jul 03, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Was soll man noch sagen...? https://www.alles-bekloppte.de/sie-koennen-ba-mobil-mit-ihrem-benutzerkonto-aktuell-nicht-verwenden/ #digitalisierung #bundesagenturfuerarbeit #arbeitsamt
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · May 19, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @bagder@mastodon.social
@bagder@mastodon.social I voted for OpenSSL because I assume that any serious use of libcurl also requires OpenSSL. This means that libcurl would always be used in combination with OpenSSL. Conversely, there are scenarios where OpenSSL is used without libcurl. This would mean OpenSSL is potentially used more frequently on devices worldwide. However, there are also systems such as Microsoft Windows where OpenSSL is not present. SQLite is very commonly embedded in systems, and libz is very often used as a dependency. It is really hard to say.
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · May 09, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @alfonsosiciliano@mastodon.bsd.cafe
@alfonsosiciliano@mastodon.bsd.cafe From a historical point of view this is interesting and somehow funny, but: isn't that now in the past? It is still necessary to handle Büsingen differently? Or am I missing something?
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · May 09, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @fernandez@troet.cafe
@fernandez@troet.cafe 🤘🏻
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · May 07, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @ralphruthe@troet.cafe
@ralphruthe@troet.cafe Traumhaft!!! :-))
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · May 05, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @sbeyer@ioc.exchange
Die Tatsache, dass status.denic.de überhaupt (wieder?) aufgelöst wird, lässt hoffen ;-)
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · May 05, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange

Imagine it’s 2026 and Microsoft is so proud of having a responsive version of a website or an app that they’re sending out emails to tell everyone about it.

So cute.

#Microsoft #Bing

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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · May 05, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @kharkerlake@karlsruhe-social.de
@kharkerlake@karlsruhe-social.de So ging es mehreren Kunden von mir :-)) Und typisch DNS: Am Anfang waren Einträge noch im Resolver-Cache, d.h. das Fehlerbild war nicht einheitlich ... das ist dann immer der beste Fall 🫣
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · May 05, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange

Aktuell gibt es Probleme beim #DENIC in Verbindung mit #DNSSEC . Auch .de-Domains die selber kein DNSSEC einsetzen, sind scheinbar über Hierarchie betroffen.

Beispielhaftes Fehlerbild für die Domain threatint.de:
https://dnssec-analyzer.verisignlabs.com/threatint.de

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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · May 04, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange

60 Sekunden Cyber KW18 2026, 27. April - 3. Mai:

Daten von Kunden und Benutzern von Vimeo werden von der Gruppierung ShinyHunters ins Dark Net gestellt, Sicherheitsforscher finden mit Copy Fail eine seit 2017 (!) bestehende Schwachstelle (CVE-2026-31431), mit der man root-Zugriff auf allen bekannteren Linux-Distributionen erhalten kann, das NGO noyb klagt gegen die Hamburger

https://www.60-sekunden-cyber.de/kw18-2026/

#cyber #cybersicherheit #itsicherheit #itsecurity #infosec #threatint #threatintel #news #update

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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Apr 20, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @azureshit@mastodon.social
@azureshit@mastodon.social 🤦🏻‍♂️
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Apr 03, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @lued@troet.cafe
@lued Es kommt für mich nicht in Frage, würde mich aber sehr interessieren, wie so ein Einsatz vergütet wird - hat hier jemand tiefere Einsichten?
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Mar 30, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @nixCraft@mastodon.social
@nixCraft I don't fully agree. As much as I’ve come to hate Microsoft’s AI strategy and products: if you look at the share price over the last three years, it actually seems to be heading back towards a more ‘normal’ level
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Mar 10, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @ralphruthe@troet.cafe
@ralphruthe@troet.cafe Dieses Witzbild ist SEHR albern! Und voll auf den Punkt! :-)
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Open post
sbeyer
Stefan Beyer @sbeyer@ioc.exchange · Jan 16, 2026
Stefan Beyer
@sbeyer@ioc.exchange

Cybersecurity professional and software engineer, helping companies of all sizes defend their networks against cyber attacks and build cyber resilience | 🌎 CY DE

ioc.exchange
Replying to @Elmar_Iachi@chaos.social
@Elmar_Iachi@chaos.social DANKE!!! für Deinen Post - bisher dachte ich immer, ich sei der einzige, der die Posts vom BSI inhaltlich mehr als bedenklich findet. Ufff ...
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