Using z3 to find a password and reverse obfuscated JavaScript - Fsec2017 CTF

Recently I attended fsec 2017 in croatia. And there was a cool CTF challenge I solved during the conference that I wanted to share.

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#CTF

[webwolfy]

This is by far my favourite hacking related YouTube channel, the story + CTF format works great as far as I'm concerned.

[seismicdna]

I think if you keep the story + film in the first part and the challenge in the second part (or vice versa), a lot of people would like it.

[kingkongrilla]

Very dope video walking through the various skillsets required to solve such a problem, as well as the need to understand the scope of a problem. De-obfuscation is really the secret sauce, once you understand the recipe manipulating it is just a matter of how lazily/efficiently you can execute.

[BoZmD]

I thought the video was a nice intro to why and where you made this. I like your humility. I also like the pacing of the video. Sure I wish you would slow down, but I can watch it again. You get to the solution quickly showing how each step fits together. I will rewatch closer.

[Jango]

I liked the story telling and thought it added to the video and made it more interesting and entertaining to watch.

[biehdc]

As you asked if storytelling + reversing is good, i dont think so, because it breaks the thought process when you try to follow whats going on, especially for less experienced like me i think

[blairsaid]

Very impressive man. Really enjoyed your video and was satisfied with the story telling.

[DSAhmed]

I love it when you drop F bombs. Great videos. I'm sad that Youtube algorithms took so long to suggest your videos to me.

[theotherguy]

Appreciate the honesty on how long it takes to solve ctfs

[MrJellekeulemans]

Love your videos. I'm learning alot from them.

[einstian]

I really like your videos! Great for learning how to deconstruct ctf challenges :)

[evilchairproductions]

I'm going trough your CTF playlist and I find my country! Yaay!

[angryman]

i need to rewatch these, since first time i saw it i didn't knew shit about this stuff

[owendearmond-macleod]

I thought it was a good mix between talking about the conference and playing the CTF.

[NickInts]

Hahaha flag hoarding! Well when you're the main person who makes CTF videos, I guess people expect you to be a god!

[SergioAndress]

Muito interessante seus vídeos sobre hacker, obrigado por compartilhar seus ensinamentos e por sua humildade em ser quem você é!

[phiber]

great meeting you dude! too bad we didnt get a chance to talk over a beer.

[DM-qmsc]

It sucked






That the video ended 😭

[msec]

Look at that Cake!!! Nice vid as always !!

[lucid]

you WERE IN CROATIA WHY THE FUK I DIDNT VISIT THAT CONFERENCE :(