@ZetaTwo profile picture
Calle Svensson @ZetaTwo

Security Engineer @ XTX. MSc in eng. physics & CompSci, dev & gamer. ❤️ music & long distance running. Wanna do a PhD sometime. Same U/N on all other sites

Joined April 2009
  • Tweets 7,649
  • Following 722
  • Followers 6,884
380 Photos and videos
Calle Svensson retweeted
LiveCTF@livectf
May 25
We didn't really post here during the event but DEFCON CTF Quals just concluded and LiveCTF was part of it with a new concept. Check out our website livectf.com/ to find links to all the recap streams we did and witness the chaotic bird training action!
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I'm optimistic we can create _some_ type of knowledge-based security-related community activity but traditional online jeopardy-style CTF as a competitive format is on its deathbed and this video hurts. Big love to the community that has meant the world to me the past 11 years!
Renwa@RenwaX23
May 24
"Dad, what was it like playing CTFs before AI?"
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Really proud of this year's edition of @livectf! And it seems to actually generate some interesting problems to solve for the teams. Next stream is in 40 min. Check it out!
Jordan Wiens@psifertex
May 23
If you aren't playing DEFCON CTF quals this weekend (heck, even if you are) and you want to see what's going on, check out LiveCTF! youtube.com/playlist?list=PL…
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I'm once again looking for a friend willing to proof-read my latest article. Ideally someone with some reverse engineering and maths knowledge.
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My @REverseConf talk about reverse engineering #AoE2 is now available on YouTube: youtube.com/watch?v=Dp-IvqfC… check it out and hear about some reverse engineering techniques and a code pattern matching tool I released: github.com/ZetaTwo/bnil-matc…

RE//verse 2026: Reversing AoE 2: Upgrading tools from Dark Age to...

From RE//verse 2026, watch Carl Svensson's talk: Reversing AoE 2: U...

youtube.com
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Check out my new article on obfuscation (and all the other cool articles) in the latest issue of PagedOut!
PagedOut@pagedout_zine
Feb 19
Here it is, our biggest issue to date, Issue #8! Read, share, enjoy! pagedout.institute/?page=iss… Get prints here - lulu.com/search?page=1&pageS… And with that CFP for #9 is open - deadline 30 April 2026
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Really looking forward to share my work on #AgeofEmpires with you all and to visit the conference.
RE//verse
@REverseConf
Jan 8
Carl Svensson (@zetatwo) is bringing Age of Empires II Definitive Edition to RE//verse 2026 as a playground for tooling. This talk walks through Binary Ninja automation to decrypt and deobfuscate game code and a BNIL query system for matching obfuscated instruction patterns. If you like game reversing you will want to see this talk: shop.binary.ninja/collection…
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LOL. I got emailed by some site building "open source profiles" for hiring, scraping GitHub and adding some things on top. You can opt out in your profile and they'll delete your page. The catch? There's no auth at all. Anyone can go and delete me here: algora.io/profile/ZetaTwo

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I'm proud of you all. My page disappeared within an hour of posting this.
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Any friends with solid low-level skills (RE, obfuscation, etc.) around to provide feedback on my new @pagedout_zine article?
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Calle Svensson retweeted
Farenain@Farenain
31 Dec 2025
A few articles from the @pagedout_zine #7 that I found interesting: * Disassembling with LLVM: using LLVM API for disassembling. * Obfuscating Crypto Constants: generating crypto constants in runtime. * Turning a GCC anti-debug trick into a LCE Easy and quick to read :D
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Seems like there's been a slightly generous interpretation of the numbers but regardless it's really cool to see how well represented Sweden is in gaming.
Martin Lindell@martinlindell
23 Dec 2025
Games made in Sweden stood for 20% of the revenue on Steam in 2025. Pretty impressive considering Sweden’s size of 10 million inhabitants. Source: @alineaanalytics
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At BSides London if anyone wants to meet up.
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Calle Svensson retweeted
Wiz
@wiz_io
12 Dec 2025
Our CTF Winners Team: operationcrownfall! @cr0wn, @ZetaTwo, @mr_nankeencr0wn dominated our on-site CTF, winning both Best Overall and Best in the Cloud & Web track. In a last minute hacking session, they shut down Egor - the evil AI Robot - and won a total of $15,000!
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No surprises, mainly rock and musicals this year. #SpotifyWrapped
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See you all in London in April!
Age of Empires
@AgeOfEmpires
3 Dec 2025
Ticket sales are LIVE for #RedBullWololo: Londinium! 🎟️ See top #AoEII and #AoEIV players compete for glory in London. But hurry, they won't last long! 🪽 Playoffs: win.gs/WololoPlayoffs Grand Final: win.gs/wololoRAH @redbullgaming
Promotional graphic for Red Bull Wololo: Londinium, an Age of Empires II: Definitive Edition and Age of Empires IV: Anniversary Edition tournament hosted by Red Bull Gaming happening in London in 2026. The Red Bull Wololo: Londinium logo is centered in front of icon London architecture at twilight under a cloudy sky, with wooden sailing ships crossing the Thames River beneath Tower Bridge while villagers, monks, and other units watch on the shore. A shiny Red Bull can covered in condensation is positioned in the lower right. Image text: Playoffs: Luxe Cinema, Leicester Square. April 4th & 5th, 2026. Grand Final - Royal Albert Hall. April 6th, 2026. Tickets on sale December 3rd, 2025 at 2pm CET. The Age of Empires II: Definitive Edition and Age of Empires IV logos are centered beneath it.

ALT Promotional graphic for Red Bull Wololo: Londinium, an Age of Empires II: Definitive Edition and Age of Empires IV: Anniversary Edition tournament hosted by Red Bull Gaming happening in London in 2026. The Red Bull Wololo: Londinium logo is centered in front of icon London architecture at twilight under a cloudy sky, with wooden sailing ships crossing the Thames River beneath Tower Bridge while villagers, monks, and other units watch on the shore. A shiny Red Bull can covered in condensation is positioned in the lower right. Image text: Playoffs: Luxe Cinema, Leicester Square. April 4th & 5th, 2026. Grand Final - Royal Albert Hall. April 6th, 2026. Tickets on sale December 3rd, 2025 at 2pm CET. The Age of Empires II: Definitive Edition and Age of Empires IV logos are centered beneath it.

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Calle Svensson retweeted
Age of Empires
@AgeOfEmpires
14 Nov 2025
You've spent thousands of hours battling through centuries of history with over 50 civilizations across the world. We're so grateful to our community as we mark six years of #AgeofEmpiresIIDE today! Thank you for playing! 🥳
A graphic celebrating the sixth anniversary of Age of Empires II: Definitive Edition. The game's retail key art is centered on a black marble background, with six characters from different DLC releases arranged in front of it. From left to right: Lysander from Chronicles: Battle for Greece, Alexander from Chronicles: Alexander the Great, Liu Bei from The Three Kingdoms, Tamar from The Mountain Royals, Oda Nobunaga from Victors and Vanquished, and Trajan from Return of Rome. A partially transparent black background outlined by golden bars reads: "Thank you for playing!" while flaming sparks float in the background behind it.

ALT A graphic celebrating the sixth anniversary of Age of Empires II: Definitive Edition. The game's retail key art is centered on a black marble background, with six characters from different DLC releases arranged in front of it. From left to right: Lysander from Chronicles: Battle for Greece, Alexander from Chronicles: Alexander the Great, Liu Bei from The Three Kingdoms, Tamar from The Mountain Royals, Oda Nobunaga from Victors and Vanquished, and Trajan from Return of Rome. A partially transparent black background outlined by golden bars reads: "Thank you for playing!" while flaming sparks float in the background behind it.

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Thank you, Maurice for a very interesting presentation. For people who like reverse engineering, I can really recommend checking it out.
Maurice Heumann@momo5502
10 Oct 2025
I held a talk about reverse engineering and bypassing Denuvo in Hogwarts Legacy at @NavajaNegra_AB The recording and the slides are now online :D momo5502.com/posts/2025-10-0…
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Accidentally switched from the "following" to the "for you" tab in Twitter, big mistake. Just posts from people who are angry, mean or both. It's truly depressing how toxic (a large portion of) social media has become. Is this how it will stay or is there any way back?
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I have now been a year in the UK. It's been pretty cool so far. Let's see what the next one holds in store.
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