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xSTF

@xstf_team

xtreme Security Task Force CTF Team from @uporto 🇵🇹

 Oporto, Portugal
linktr.ee/xstf
Joined April 2017
  • Tweets63
  • Following28
  • Followers446
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Photo by xSTF (@xstf_team)Photo by xSTF (@xstf_team)Photo by xSTF (@xstf_team)Photo by xSTF (@xstf_team)Photo by xSTF (@xstf_team)Photo by xSTF (@xstf_team)Photo by xSTF (@xstf_team)Photo by xSTF (@xstf_team)Photo by xSTF (@xstf_team)Photo by xSTF (@xstf_team)
No clankers allowed, just human brains🤖🚩 The hack.lu organizers did an amazing job filtering out AI usage. Excellent set of challenges from @fluxfingers , we had a great time solving them. #xstf #uporto #CTF
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Wearing the nacional colors at ECSC 2026.🇵🇹 After an intense week of competition, proud of you guys for all the work and dedication.🐟 📸 @CNCSgovpt 📍@ECSC_openECSC
Image from xSTF (@xstf_team)
Image from xSTF (@xstf_team)
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In them we trust 🐟🇵🇹 @ECSC_openECSC
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I may have organized a challenge (or two) for upCTF by @xstf_team, starting in 14 hours! Register now for a chance to win cool prizes 🥷 ctf.xstf.pt
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🚨 IT’S OFFICIAL! 🚨 xSTF presents: upCTF 2026 🏴‍☠️ Our first @CTFtime global event is dropping March 7th. We’ve got a massive 💰 $12,000+ in prizes and 48 hours of pure pwnage. 👉 Register your team: ctf.xstf.pt RT to invite your squad. #ctf
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We did it! 🏆 We just took 1st place in the CTF at @Bsideslisbon 2025 🇵🇹 #xstf #uporto
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Join us for an Intro to CTFs Workshop. No prior experience needed, just curiosity and enthusiasm! 🔐 📍 Dates: (starting at 2PM): 17th Sep @ FCUP, DCC, 1.83 - xSTF Room 24th Sep @ FEUP, TBD 1st Oct @ FEUP, TBD 📝 Rooms will be announced soon.
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Not even the summer heat can stop us ☀️🚩 #xstf #uporto
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Being back never felt so good 🚩 #xstf #uporto
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📸 Flashbacks from an unforgettable May 17th! A huge thank you to everyone who joined us, participated, and made the day such a success! 🚩💻 See you at the next one! #CyberSecurity #UPorto #CTF #xSTF #ACMFEUP
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Image from xSTF (@xstf_team)
Image from xSTF (@xstf_team)
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Your friends bailed or aren't into CTFs? 🚩 We've got your back. 🤝 Sign up solo and we'll match you with other hackers! Link in bio for more information. #CyberSecurity #UPorto #CTF #xSTF #ACMFEUP
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Image from xSTF (@xstf_team)
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Hack your way to some cash! 🚩💸 These are our podium prizes for you: 🏆 1st Prize - 400 € (300 € store voucher + 7.1 Tech Hub Interview and CV analysis) 🏆 2nd Prize - 200 € store voucher 🏆 3rd Prize - 100 € store voucher #CyberSecurity #UPorto #CTF #xSTF #ACMFEUP
Image from xSTF (@xstf_team)
Image from xSTF (@xstf_team)
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Get ready for an electrifying day of hacking, learning, and connecting! 🚩🤩 Here’s how the day unfolds. See you all there! #CyberSecurity #UPorto #CTF #xSTF #ACMFEUP
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Image from xSTF (@xstf_team)
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And that’s a wrap on April! 🚩 On to the next! #xstf #uporto
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🚨Ready to hack the system? ACM FEUP & xSTF FCUP are hosting a beginner-friendly CTF on May 17 @ FEUP! 💸 €700 in prizes 🍕 Free lunch 🤝 Meet Euronext, CGI, Checkmarx & more. Teams of 3-5. Sign up via our bio! #CTF #CyberSecurity #xSTF #ACMFEUP #FEUP #FCUP #UPorto #TechEvents
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What a nice way to close April. 🤩 Thank you to everyone who participated! 🚩 #xstf #uporto
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A new #pwn writeup made by vLad was just posted in our website. ✏️📃 Go check it out! (link in bio) #xstf #uporto
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A new writeup made by @coutinho0x21 was just posted in our website. ✏️📃 Go check it out! (link in bio)
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What a wonderful Easter weekend 🐰 Our hackers are to be congratulated! 🚩🤩 #xstf #uporto
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Back in 2015, the @xstf_team team was founded at @uporto. I got invited to the first CTF and embraced the captain role shortly after. In the first months, there were just 3 active players: @JLLiS , Joana Barão, and me. Almost no one wanted to join us. But we still pushed through sleepless nights, sometimes ending up with 0 points in multiple CTFs as we worked to grow the team. Then, @cirne12, and now @goncalomelo_sw, stepped up as captains and took the team to a new level. Let's go!
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