Job Njenga

MIT Engineer Builds Tongue-Controlled Device For Paralyzed Users

💥Presenting the champions of p3rf3ctr00t CTF 2025! 🔥 🥇 1st Place — 0xfun 🥈 2nd Place — Al_Qabilah 🥉 3rd Place — Escadron Congratulations to these outstanding teams for an incredible performance! Thanks to all our sponsors and creators👏👏

💯💯P3rf3ctr00t CTF 2025 has officially come to an end🎉🎉. It was a great success. GG to everyone that participated and congrats to the winners.🎉🎉 UNTIL NEXT TIME👏👏 Also kudos to the support for 48 hrs of consistency😁😁

@tryhackme @konfushon has to be sticker chaos 😂😂

So which hacker are you? Sticker chaos or corporate clean? And seriously… who hurt you if you hate stickers?

🗣️🗣️The wait is almost over! P3rf3ctr00t CTF 2025 is around the corner — bigger, tougher, and more thrilling than ever.🎉 Gear up to test your skills, push your limits, and prove your dominance in the cybersecurity arena.🔥🔥 💥 Coming soon… Thanks to all our partners🙏🙏

Congrats again!!!🎉🎉, to the team @p3rf3ctr00t for bringing another one home . Led by @alvin_kidwiz we won the @SafaricomPLC PwnZone ctf. We are really umatched at this level😂😂. GG to all those legends who participated👍🏾👍🏾.

Another win for the team🔥🔥, participating in @AfricaCERT @CTF_Room @AfNOGWorkshops Cyber Drill. Congrats to the team led by @L0rd5ud0 🎉🎉. GG💯

@0xeliashezron I wouldn't have put it any other way 💯

𝗪𝗵𝘆 Crypto payments are not feassible for most African Markets. In powerhouses like Nigeria, Kenya, and South Africa, you can go fully cashless: every transaction, down to the cent, via digital payments. Mobile money penetration hits >86.6% in Kenya thanks to MPESA and drives >51% of African adults using digital tools overall. These countries embraced fintech early, making them ripe for crypto integration. This is also be reflected by the total value received in sub-saharan Africa with the highest volumes of crypto received in countries with high digital payment adoption. (Excerpt from chainalysis) Contrast that with cash-dominant economies like Uganda, Tanzania, and Ghana. Here, digital payments often come with "include withdrawal fees" caveats, limiting seamless use. Mobile money exists but cash reigns SUPREME. The main use case for mobile money is remittances and transfer payments whose recipients then convert it for cash via OTC desks (see image) for real-world use. Why is digital payment adoption low in Uganda and Tanzania? As a Ugandan, I confidently say it's due to low trust: fear that payers might claim "mistaken payment" and reverse it, doubts about government guarantees to secure the payment, and concerns over telecoms securing your funds. We have solid digital infrastructure, but in a trust-based society, human-level confidence is the missing piece. Crypto payment adoption (beyond remittances) needs a foundation of real-world digital payment adoption to take off. Without robust trust guarantees from governments and telecom companies, digital payment adoption drops and so does crypto payment adoption. Bottom line: Crypto payments could supercharge digital payments in cash economies, but it must build on (or solve) these human trust hurdles first. Crypto might help bridge remittances to digital payments, but we're not there yet.

@veggie_eric You can pick up a thing or two. The more you practice, the more you learn.

Has anyone actually successfully learned a language using Duolingo Seems like a lot of cute graphics and satisfying sound effects but I'm not buying that it actually works...

@cd_slash_x @vxunderground Uhm, gemini works just fine on my end.

@vxunderground Gemini, Claude and Deepseek all seem to be down too (via Cursor at least)... OpenAI seems like it's still working

wtf did yall do

@TheQuillBot For how long should we wait? It's been hours 🥲

LINUX USERS ARE NOT HACKERS! LINUX USERS ARE NOT HACKERS! LINUX USERS ARE NOT HACKERS! LINUX USERS ARE NOT HACKERS! LINUX USERS ARE NOT HACKERS! LINUX USERS ARE NOT HACKERS! LINUX USERS ARE NOT HACKERS! LINUX USERS ARE NOT HACKERS!

🚀 Kicking Off My Web3 Learning Journey Series! I've received many questions about how I transitioned into Web3 Security. So, I’ve decided to share my exact learning journey, step by step. This isn’t meant to be the ultimate guide. There are plenty of great resources out there (many probably better). But this is what genuinely worked for me, and I hope it’ll help in your own journey.

do you agree?

💣Pre-auth RCE in under 10 minutes. This vuln survived years of audits because it looked innocuous: forgotten service, commented code, and an obscure serializer. Humans skim past that, but AI doesn’t blink. 🤖

Plot twist: the FlexNetOperationsService was commented out in the config. Was this another dead end?🤔Well... the .svc file was still deployed. In IIS, that means the service was still live! Hacktron built a quick SOAP payload, fired it, and got a Windows directory listing back.

⚠️Then it landed on one weird serializer: NetDataContractSerializer. It turns out that this serializer embeds .NET metadata. Translation? It lets attackers sneak in full .NET objects if you’re not careful! The serializer lived inside a WCF service called FlexNetOperationsService.

Enter Hacktron — our AI security engineer. We gave it the decompiled .NET code and said: "Find pre-auth deserialization flaws". It tore through thousands of files in minutes. First stop: every .Deserialize() call it could see. Most were boring JSON converters with safe defaults.

Apple once ran this software. Multiple security firms poked at it. No one spotted the bug. Here's a thread of how we found CVE-2025-5086 in Delmia Apriso... 👇🧵