 Hey, what is going on everybody? My name is John Hammond. Welcome back to the YouTube video again showing off the Kaizen CTF I this time I want to show off that blackjack challenge So this was an interesting one because it looked like a 500 point challenge So I was waiting to get to it early on in the competition But my teammates were looking the scoreboard and thankfully it showed like what everyone else and what other teams were solving It looked like everyone had seemed to solve blackjack So we were like what is it? Is it is it really easy or something or why? How did everyone get this so quickly? It's a 500 point challenge. So We took a look at it and I had seen that kind of exploit before so I was able to get it really quickly because it's not a difficult thing It's just like tricking the program. So here we go The challenge prompt is the Kaizen teams open up their new casino casino and you're invited I hear they have a special flag if you can win a million dollars. So It's this netcat session. We'll go ahead and connect to it Honestly, I don't know if the intention was to literally script something to play blackjack over and over again I'm sure that's not it because I don't know. We seem to get it. Okay The idea is good luck. You have this much amount of money How much would you like to bet so you can bet whatever amount of money you want and you can play the game by entering these capital letters and You will lose money if you lose that amount, etc if If that's how the game plays through or if you get it, right Whatever the case may be you can keep doubling down or doing whatever you want. You can keep betting it however much money You do want I am apparently not getting any luck and not being able to get anything Okay, cool. So I was dealt something and I didn't lose money that time But I keep moving keep moving and I eventually lose money. So What I kind of thought I've seen this kind of thing before where you can suggest how much money you want or how much money you want to get and You'll lose money or like you were buying something or buying a flag So what you can do is you can say I would like to buy something with a negative on a negative amount of money Or I would like to bet negative amount of money and once you lose You will be subtracted a negative amount of money and you will gain that much money So if I were to say I want negative a bunch of money and then I lose eventually. Oh, hey Okay, that wasn't enough. We'll try again. You can keep doing this Honestly until you get something that does work for you and you get your flag It's kind of variable how the game will play out because it looks like the blackjack thing is random I don't know. I've literally never seen that happen before. It's really funny that that happens while I'm playing the game I didn't realize I would get a blackjack But if you get busted and you lose that much amount of money you get however much money You said you wanted to lose which is a negative value in this case So you gain the money and you get a flag once you're over a million dollars. So easy easy Just specifying I want to lose a negative amount of money, which will give you money So just something to keep in mind if you ever have any challenges like that where you want to spend money on something Try spending a negative amount of money. So and then we get our flag Again, not a difficult challenge. We were very curious like how are so many people getting this 500 point thing very early on in the game. So we jumped on it as soon as we could cool Thanks for watching guys. See you next video